[Qemu-devel] [Bug 502107] Re: qemu-kvm 0.12.1.2 crashes booting Ubuntu 9.10 with "-vga std"

[Michael Kofler]

PS: qemu-kvm -version = 0.13.0

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https://bugs.launchpad.net/bugs/502107

Title:
  qemu-kvm 0.12.1.2 crashes booting Ubuntu 9.10 with "-vga std"

Status in QEMU:
  Confirmed

Bug description:
  I have an Ubuntu VM that works fine without "-vga std" but crashes if I add 
"-vga std".  This is the full command line:

qemu-system-x86_64 -vga std -drive
cache=writeback,index=0,media=disk,file=ubuntu.img -k en-us -m 2048 -smp 2 -vnc
:3102 -usbdevice tablet -enable-kvm &

I get this error:

 KVM internal error. Suberror: 1
rax 00007f789177e000 rbx 0000000000000000 rcx 0000000000000000 rdx
0000000000000000
rsi 0000000000000000 rdi 00007f789177e000 rsp 00007fff361775e8 rbp
00007fff36177600
r8  000000000000ff80 r9  0000000000200000 r10 0000000000000000 r11
00007f789100a3f0
r12 00000000004017c0 r13 00007fff36178cf0 r14 0000000000000000 r15
0000000000000000
rip 00007f789100aa7b rflags 00013206
cs 0033 (00000000/ffffffff p 1 dpl 3 db 0 s 1 type b l 1 g 1 avl 0)
ds 0000 (00000000/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
es 0000 (00000000/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
ss 002b (00000000/ffffffff p 1 dpl 3 db 1 s 1 type 3 l 0 g 1 avl 0)
fs 0000 (7f78917906f0/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
gs 0000 (00000000/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
tr 0040 (ffff880001a09440/00002087 p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0)
ldt 0000 (00000000/ffffffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
gdt ffff8800019fa000/7f
idt ffffffff818fd000/fff
cr0 80050033 cr2 2408000 cr3 379d4000 cr4 6f0 cr8 0 efer d01
emulation failure, check dmesg for details

I'm running kernel 2.6.32, and I have the kvm stuff compiled directly into the
kernel.  There's nothing in dmesg about kvm at all.

Note that in the VM grub comes up, but the VM dies when I boot the kernel.

This command line works:

qemu-system-x86_64 -drive cache=writeback,index=0,media=disk,file=ubuntu.img -k
en-us -m 2048 -smp 2 -vnc :3102 -usbdevice tablet -enable-kvm &

That is, removing "-vga std" fixes the problem.

I recently added this option to both my Ubuntu and Windows XP VMs.  The Windows 
VM still works fine.  If Windows can detect that the graphics card has changed, 
then Ubuntu should also have no problem.  That being said, I added the std 
option when using 0.12.1.1, so there may be a qemu regression.

I have reported this bug elsewhere:  
http://bugs.gentoo.org/show_bug.cgi?id=299211