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[Qemu-discuss] No graphical interface on virtualized guest OS (on Arndal

From: guillaume.menant
Subject: [Qemu-discuss] No graphical interface on virtualized guest OS (on Arndale board)
Date: Thu, 5 Feb 2015 09:04:13 +0000
Hello,

We are currently trying to launch an Ubuntu guest OS (with virtualization/kvm) on a Cortex-A15/Exynos 5250 Arndale board with the following qemu command line :

qemu-system-arm \
 -enable-kvm \
 -m 512 -M vexpress-a15 -cpu cortex-a15 -smp 2 \
 -drive if=none,cache=writeback,file=rootfs_guest.img,id=drive0 \
 -device virtio-blk-device,drive=drive0 \
 -kernel zImage \
 -append "root=/dev/vda rw console=ttyAMA0 rootwait" \
 -dtb vexpress-v2p-ca15-tc1.dtb \
 -netdev type=tap,id=net0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown,vhost=off -device virtio-net-device,netdev=net0,mac="52:54:00:12:34:01" \
 -serial stdio

Our host and guest systems are "Linux armHost2 3.18.3-linaro-arndale #21 SMP Thu Jan 29 14:05:50 UTC 2015 armv7l armv7l armv7l GNU/Linux" (with different kernel configuration)

Our QEMU version is "QEMU emulator version 2.1.0 (Debian 2.1+dfsg-4ubuntu6), Copyright (c) 2003-2008 Fabrice Bellard"

>> We would like to have the guest graphical desktop displayed in the window opened by QEMU

Our dmesg boot log is the following :

Executing /etc/qemu-ifup
Bringing up tap0 for bridged mode...
Adding tap0 to br0...
pulseaudio: pa_context_connect() failed
pulseaudio: Reason: Connection refused
pulseaudio: Failed to initialize PA contextaudio: Could not init `pa' audio driver
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 3.18.3 (address@hidden) (gcc version 4.9.1 (Ubuntu/Linaro 4.9.1-16ubuntu6) ) #10 SMP Wed Feb 4 15:01:01 UTC 2015
[    0.000000] CPU: ARMv7 Processor [410fc0f4] revision 4 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
[    0.000000] Machine model: V2P-CA15
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] PERCPU: Embedded 11 pages/cpu @dfbd6000 s13888 r8192 d22976 u45056
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048
[    0.000000] Kernel command line: root=/dev/vda rw console=ttyAMA0 rootwait
[    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000] Memory: 508056K/524288K available (8088K kernel code, 341K rwdata, 2200K rodata, 532K init, 352K bss, 16232K reserved, 0K highmem)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xffe00000   (2048 kB)
[    0.000000]     vmalloc : 0xe0800000 - 0xff000000   ( 488 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)
[    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
[    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
[    0.000000]       .text : 0xc0008000 - 0xc0a14364   (10289 kB)
[    0.000000]       .init : 0xc0a15000 - 0xc0a9a000   ( 532 kB)
[    0.000000]       .data : 0xc0a9a000 - 0xc0aef470   ( 342 kB)
[    0.000000]        .bss : 0xc0aef470 - 0xc0b475f4   ( 353 kB)
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] GIC physical location is 0x2c001000
[    0.000000] L2C: failed to init: -19
[    0.000000] Architected cp15 timer(s) running at 24.00MHz (virt).
[    0.000003] sched_clock: 56 bits at 24MHz, resolution 41ns, wraps every 2863311519744ns
[    0.000010] Switching to timer-based delay loop, resolution 41ns
[    0.000112] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956969942ns
[    0.000853] Console: colour dummy device 80x30
[    0.000881] Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=240000)
[    0.000901] pid_max: default: 32768 minimum: 301
[    0.001059] Security Framework initialized
[    0.001090] AppArmor: AppArmor initialized
[    0.001165] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.001183] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.001915] CPU: Testing write buffer coherency: ok
[    0.001963] ftrace: allocating 27033 entries in 80 pages
[    0.025417] /cpus/address@hidden missing clock-frequency property
[    0.025441] /cpus/address@hidden missing clock-frequency property
[    0.025460] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.025701] Setting up static identity map for 0x80751ea0 - 0x80751ef8
[    0.034611] CPU1: Booted secondary processor
[    0.034743] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.034940] Brought up 2 CPUs
[    0.034978] SMP: Total of 2 processors activated (96.00 BogoMIPS).
[    0.034996] CPU: All CPU(s) started in SVC mode.
[    0.035951] devtmpfs: initialized
[    0.040029] VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0
[    0.041146] xor: measuring software checksum speed
[    0.135290]    arm4regs  :  2974.400 MB/sec
[    0.235489]    8regs     :  2902.400 MB/sec
[    0.335703]    32regs    :  2595.600 MB/sec
[    0.335737] xor: using function: arm4regs (2974.400 MB/sec)
[    0.336503] regulator-dummy: no parameters
[    0.340105] NET: Registered protocol family 16
[    0.340942] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.456579] cpuidle: using governor ladder
[    0.486740] cpuidle: using governor menu
[    0.487627] of_amba_device_create(): amba_device_add() failed (-19) for /address@hidden
[    0.488000] of_amba_device_create(): amba_device_add() failed (-19) for /address@hidden
[    0.488234] of_amba_device_create(): amba_device_add() failed (-19) for /address@hidden
[    0.489966] of_amba_device_create(): amba_device_add() failed (-19) for /smb/motherboard/address@hidden,00000000/address@hidden
[    0.492446] of_amba_device_create(): amba_device_add() failed (-19) for /smb/motherboard/address@hidden,00000000/address@hidden
[    0.494406] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[    0.494423] hw-breakpoint: maximum watchpoint size is 8 bytes.
[    0.494459] Serial: AMBA PL011 UART driver
[    0.494593] uart-pl011 1c090000.uart: ttyAMA0 at MMIO 0x1c090000 (irq = 37, base_baud = 0) is a PL011 rev1
[    0.622016] console [ttyAMA0] enabled
[    0.623515] uart-pl011 1c0a0000.uart: ttyAMA1 at MMIO 0x1c0a0000 (irq = 38, base_baud = 0) is a PL011 rev1
[    0.626545] uart-pl011 1c0b0000.uart: ttyAMA2 at MMIO 0x1c0b0000 (irq = 39, base_baud = 0) is a PL011 rev1
[    0.629729] uart-pl011 1c0c0000.uart: ttyAMA3 at MMIO 0x1c0c0000 (irq = 40, base_baud = 0) is a PL011 rev1
[    0.846732] raid6: int32x1    350 MB/s
[    1.016910] raid6: int32x2    514 MB/s
[    1.187113] raid6: int32x4    594 MB/s
[    1.357229] raid6: int32x8    608 MB/s
[    1.358346] raid6: using algorithm int32x8 (608 MB/s)
[    1.359823] raid6: using intx1 recovery algorithm
[    1.361728] 3V3: 3300 mV
[    1.363124] SCSI subsystem initialized
[    1.364799] usbcore: registered new interface driver usbfs
[    1.366831] usbcore: registered new interface driver hub
[    1.368455] usbcore: registered new device driver usb
[    1.370459] Advanced Linux Sound Architecture Driver Initialized.
[    1.373184] NetLabel: Initializing
[    1.374304] NetLabel:  domain hash size = 128
[    1.375620] NetLabel:  protocols = UNLABELED CIPSOv4
[    1.377143] NetLabel:  unlabeled traffic allowed by default
[    1.378986] Switched to clocksource arch_sys_counter
[    1.400279] AppArmor: AppArmor Filesystem Enabled
[    1.413418] NET: Registered protocol family 2
[    1.415264] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
[    1.417356] TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
[    1.419446] TCP: Hash tables configured (established 4096 bind 4096)
[    1.421326] TCP: reno registered
[    1.422297] UDP hash table entries: 256 (order: 1, 8192 bytes)
[    1.424029] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
[    1.426190] NET: Registered protocol family 1
[    1.427921] RPC: Registered named UNIX socket transport module.
[    1.429723] RPC: Registered udp transport module.
[    1.431114] RPC: Registered tcp transport module.
[    1.432503] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    1.434907] hw perfevents: enabled with armv7_cortex_a15 PMU driver, 1 counters available
[    1.438091] futex hash table entries: 512 (order: 3, 32768 bytes)
[    1.440291] audit: initializing netlink subsys (disabled)
[    1.441904] audit: type=2000 audit(1.410:1): initialized
[    1.444762] VFS: Disk quotas dquot_6.5.2
[    1.446003] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    1.449137] NFS: Registering the id_resolver key type
[    1.450788] Key type id_resolver registered
[    1.452018] Key type id_legacy registered
[    1.453231] jffs2: version 2.2. (NAND) (SUMMARY)  © 2001-2006 Red Hat, Inc.
[    1.455664] 9p: Installing v9fs 9p2000 file system support
[    1.457628] msgmni has been set to 992
[    1.461011] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
[    1.463223] io scheduler noop registered
[    1.464388] io scheduler deadline registered
[    1.465680] io scheduler cfq registered (default)
[    1.467648] clcd-pl11x 1c1f0000.clcd: PL111 rev2 at 0x1c1f0000
[    1.469852] clcd-pl11x 1c1f0000.clcd: /smb/motherboard/address@hidden,00000000/address@hidden hardware, address@hidden display
[    1.524749] Console: switching to colour frame buffer device 80x30
[    1.539142] Cores: 800 <--> 1050 mV at 900 mV
[    1.559076] VIO: at 3300 mV
[    1.741556] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    1.745288] [drm] Initialized drm 1.1.0 20060810
[    1.753654] brd: module loaded
[    1.758302] loop: module loaded
[    1.769922]  vda: unknown partition table
[    1.772492] mtdoops: mtd device (mtddev=name/number) must be supplied
[    1.885321] smsc911x 1a000000.ethernet (unnamed net_device) (uninitialized): Device not READY in 100ms aborting
[    1.888657] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.890548] ehci-pci: EHCI PCI platform driver
[    1.891923] ehci-platform: EHCI generic platform driver
[    1.893672] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    1.895581] ohci-pci: OHCI PCI platform driver
[    1.896959] ohci-platform: OHCI generic platform driver
[    1.898653] uhci_hcd: USB Universal Host Controller Interface driver
[    1.900766] [GIZ] plat probe
[    1.901751] nxp-isp1760 1b000000.usb: NXP ISP1760 USB Host Controller
[    1.903615] nxp-isp1760 1b000000.usb: new USB bus registered, assigned bus number 1
[    1.905877] nxp-isp1760 1b000000.usb: Scratch test failed.
[    1.907481] nxp-isp1760 1b000000.usb: can't setup: -19
[    1.909029] nxp-isp1760 1b000000.usb: USB bus 1 deregistered
[    1.910903] usbcore: registered new interface driver usb-storage
[    1.913592] mousedev: PS/2 mouse device common for all mice
[    1.916889] rtc-pl031 1c170000.rtc: rtc core: registered pl031 as rtc0
[    1.920849] device-mapper: ioctl: 4.28.0-ioctl (2014-09-17) initialised: address@hidden
[    1.923712] mmci-pl18x 1c050000.mmci: Got CD GPIO
[    1.925253] mmci-pl18x 1c050000.mmci: Got WP GPIO
[    1.926757] mmci-pl18x 1c050000.mmci: No vqmmc regulator found
[    1.928573] mmci-pl18x 1c050000.mmci: mmc0: PL181 manf 41 rev0 at 0x1c050000 irq 41,42 (pio)
[    1.970313] ledtrig-cpu: registered to indicate activity on CPUs
[    1.973203] usbcore: registered new interface driver usbhid
[    1.975940] usbhid: USB HID core driver
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4248:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4727:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: No such file or directory
audio: Failed to create voice `lm4549.out'
[    2.011826] input: AT Raw Set 2 keyboard as /devices/smb/smb:motherboard/smb:motherboard:address@hidden,00000000/1c060000.kmi/serio0/input/input0
[    2.039944] aaci-pl041 1c040000.aaci: ARM AC'97 Interface PL041 rev0 at 0x1c040000, irq 43
[    2.043668] aaci-pl041 1c040000.aaci: FIFO 512 entries
[    2.046624] oprofile: using timer interrupt.
[    2.048801] Netfilter messages via NETLINK v0.30.
[    2.050846] nf_conntrack version 0.5.0 (7938 buckets, 31752 max)
[    2.053694] ctnetlink v0.93: registering with nfnetlink.
[    2.056394] ip_tables: (C) 2000-2006 Netfilter Core Team
[    2.058797] TCP: cubic registered
[    2.060234] Initializing XFRM netlink socket
[    2.062264] NET: Registered protocol family 10
[    2.066147] ip6_tables: (C) 2000-2006 Netfilter Core Team
[    2.068647] sit: IPv6 over IPv4 tunneling driver
[    2.071541] NET: Registered protocol family 17
[    2.073852] NET: Registered protocol family 15
[    2.075921] bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your scripts to load br_netfilter if you need this.
[    2.080817] Bridge firewalling registered
[    2.082068] Ebtables v2.0 registered
[    2.084255] 9pnet: Installing 9P2000 support
[    2.087813] Key type dns_resolver registered
[    2.089642] Registering SWP/SWPB emulation handler
[    2.093837] Btrfs loaded
[    2.094926] AppArmor: AppArmor sha1 policy hashing enabled
[    2.097421] rtc-pl031 1c170000.rtc: setting system clock to 2015-02-05 08:49:14 UTC (1423126154)
[    2.100944] ALSA device list:
[    2.101911]   #0: ARM AC'97 Interface PL041 rev0 at 0x1c040000, irq 43

[    2.740272] EXT3-fs (vda): error: couldn't mount because of unsupported optional features (240)
[    2.751957] EXT2-fs (vda): error: couldn't mount because of unsupported optional features (240)
[    2.782495] EXT4-fs (vda): mounted filesystem with ordered data mode. Opts: (null)
[    2.785878] VFS: Mounted root (ext4 filesystem) on device 254:0.
[    2.788868] devtmpfs: mounted
[    2.790564] Freeing unused kernel memory: 532K (c0a15000 - c0a9a000)
Mount failed for selinuxfs on /sys/fs/selinux:  No such file or directory
[    2.974974] random: init urandom read with 6 bits of entropy available

[    3.101145] init: plymouth-upstart-bridge main process ended, respawning

[    3.166093] init: plymouth-upstart-bridge main process (1153) terminated with status 1
[    3.169376] init: plymouth-upstart-bridge main process ended, respawning

 * Starting Mount filesystems on boot                                    [ OK ]
 * Starting Signal sysvinit that the rootfs is mounted                   [ OK ]
 * Starting Populate /dev filesystem                                     [ OK ]
 * Stopping Populate /dev filesystem                                     [ OK ]
 * Starting Clean /tmp directory                                         [ OK ]
 * Starting Populate and link to /run filesystem                         [ OK ]
 * Stopping Populate and link to /run filesystem                         [ OK ]
 * Stopping Clean /tmp directory                                         [ OK ]
 * Stopping Track if upstart is running in a container                   [ OK ]
 * Starting Initialize or finalize resolvconf                            [ OK ]
 * Starting Signal sysvinit that virtual filesystems are mounted         [ OK ]
 * Starting Signal sysvinit that virtual filesystems are mounted         [ OK ]
 * Starting Bridge udev events into upstart                              [ OK ]
 * Starting Signal sysvinit that local filesystems are mounted           [ OK ]
 * Starting device node and kernel event manager                         [ OK ]
 * Starting Signal sysvinit that remote filesystems are mounted          [ OK ]
 * Starting flush early job output to logs                               [ OK ]
 * Starting load modules from /etc/modules                               [ OK ]
 * Starting cold plug devices                                            [ OK ]
 * Starting log initial device creation                                  [ OK ]
 * Starting D-Bus system message bus                                     [ OK ]
 * Stopping Mount filesystems on boot                                    [ OK ]
 * Stopping load modules from /etc/modules                               [ OK ]
 * Stopping flush early job output to logs                               [ OK ]
 * Starting SystemD login management service                             [ OK ]
 * Starting configure network device security                            [ OK ]
 * Starting system logging daemon                                        [ OK ]
 * Starting mDNS/DNS-SD daemon                                           [ OK ]
 * Starting Reload cups, upon starting avahi-daemon to make sure remote q[ OK ]are populated
 * Starting Reload cups, upon starting avahi-daemon to make sure remote q[fail]are populated
 * Starting set console font                                             [ OK ]
 * Stopping set console font                                             [ OK ]
 * Starting userspace bootsplash                                         [ OK ]
 * Stopping userspace bootsplash                                         [ OK ]
 * Starting Send an event to indicate plymouth is up                     [ OK ]
 * Stopping Send an event to indicate plymouth is up                     [ OK ]
 * Starting configure network device security                            [ OK ]
 * Starting configure network device security                            [ OK ]
 * Stopping cold plug devices                                            [ OK ]
 * Starting configure network device                                     [ OK ]
 * Stopping log initial device creation                                  [ OK ]
 * Starting configure network device security                            [ OK ]
 * Starting save udev log and update rules                               [ OK ]
 * Stopping save udev log and update rules                               [ OK ]
 * Starting Mount network filesystems                                    [ OK ]
 * Starting Failsafe Boot Delay                                          [ OK ]
 * Starting SMB/CIFS File Server                                         [ OK ]
 * Starting configure network device                                     [ OK ]
 * Starting SMB/CIFS File and Active Directory Server                    [ OK ]
 * Starting configure virtual network devices                            [ OK ]
 * Stopping Mount network filesystems                                    [ OK ]
 * Starting SMB/CIFS File and Active Directory Server                    [fail]
 * Starting bluetooth daemon                                             [ OK ]
 * Starting bluetooth daemon                                             [ OK ]
 * Starting bluetooth daemon                                             [ OK ]
 * Starting Bridge file events into upstart                              [ OK ]
 * Starting Bridge socket events into upstart                            [ OK ]
 * Starting bluetooth daemon                                             [ OK ]
 * Starting bluetooth daemon                                             [ OK ]
 * Starting bluetooth daemon                                             [ OK ]
 * Starting bluetooth daemon                                             [ OK ]
 * Starting bluetooth daemon                                             [fail]

 * Starting Mount network filesystems                                    [ OK ]
 * Starting configure network device                                     [ OK ]
 * Stopping Failsafe Boot Delay                                          [ OK ]
 * Starting System V initialisation compatibility                        [ OK ]
 * Starting NetBIOS name server                                          [ OK ]
 * Stopping Mount network filesystems                                    [ OK ]
 * Setting up X socket directories...                                    [ OK ]
 * Stopping System V initialisation compatibility                        [ OK ]
 * Starting network benchmark server                                     [ OK ]
 * Starting internet superserver inetd                                   [ OK ]

Last login: Thu Feb  5 08:42:26 UTC 2015 on tty1
Welcome to Linaro 14.04 (GNU/Linux 3.18.3 armv7l)

 * Documentation:  https://wiki.linaro.org/
address@hidden:~#

We currently have the following behaviour :
- When booting 2 penguins are displayed in the QEMU graphical window (if we remove "-serial stdio" option, kernel boot traces are also displayed in this window)
- Then QEMU window turns black and prompt is displayed in the window where I launched QEMU command line
-> If I stop directly the guest by "init 0" I see the guest "tty1" prompt during around 1sec in the QEMU graphical window
-> If I wait a long time and then stop the guest by "init 0" I see the guest "desktop" (lxdm) during around 1sec in the QEMU graphical window

My questions :
- Why are we facing this black screen ?
- Why do we something in the QEMU graphical window only when guest stops ?
- Why does it takes so much time to the guest to display the lxdm desktop ?

Thanks for your help,

Guillaume
_________________________________________________________________________________________________________________________

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