Re: [Libreboot] [Libreboot T60 from Gluglug] Sometimes my Qualcomm Atheros AR9285 Wireless Network Adapter drops the connection to never reestablish it again (until reboot)

[Jorge Araya Navarro]

Hope we can squash it!

--8<---------------cut here---------------start------------->8---
$ lsmod | grep ath
ath9k                 122880  0
ath9k_common           28672  1 ath9k
ath9k_hw              438272  2 ath9k_common,ath9k
ath                    24576  3 ath9k_common,ath9k,ath9k_hw
mac80211              565248  1 ath9k
cfg80211              409600  4 ath,ath9k_common,ath9k,mac80211
led_class              16384  2 ath9k,thinkpad_acpi
--8<---------------cut here---------------end--------------->8---
--8<---------------cut here---------------start------------->8---
$ dmesg | grep firmware
[  +0,424592] psmouse serio2: trackpoint: IBM TrackPoint firmware: 0x0e, 
buttons: 3/3
--8<---------------cut here---------------end--------------->8---
--8<---------------cut here---------------start------------->8---
$ modinfo ath9k
filename:       
/lib/modules/4.1.13-gnu-1-lts/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko.gz
license:        Dual BSD/GPL
description:    Support for Atheros 802.11n wireless LAN cards.
author:         Atheros Communications
alias:          pci:v0000168Cd00000036sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001028sd0000020Ebc*sc*i*
alias:          pci:v0000168Cd00000036sv00001043sd000085F2bc*sc*i*
alias:          pci:v0000168Cd00000036sv000017AAsd00004026bc*sc*i*
alias:          pci:v0000168Cd00000036sv000017AAsd00003026bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000105Bsd0000E099bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000105Bsd0000E091bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000105Bsd0000E081bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000105Bsd0000E08Fbc*sc*i*
alias:          pci:v0000168Cd00000036sv0000105Bsd0000E07Fbc*sc*i*
alias:          pci:v0000168Cd00000036sv0000185Fsd0000A120bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000185Fsd00003027bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001B9Asd000028A4bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001B9Asd000028A2bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001B9Asd00002813bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001B9Asd00002810bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000144Fsd00007202bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd00002F82bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd0000218Cbc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd0000218Bbc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd00002182bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd0000213Bbc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd00002130bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000813bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000803bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000692bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00001832bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000832bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000612bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000652bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000642bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000168Csd0000302Cbc*sc*i*
alias:          pci:v0000168Cd00000036sv0000168Csd00003027bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000144Dsd0000412Abc*sc*i*
alias:          pci:v0000168Cd00000036sv0000144Dsd00004129bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000144Dsd0000411Ebc*sc*i*
alias:          pci:v0000168Cd00000036sv0000144Dsd0000411Dbc*sc*i*
alias:          pci:v0000168Cd00000036sv0000144Dsd0000411Cbc*sc*i*
alias:          pci:v0000168Cd00000036sv0000144Dsd0000411Bbc*sc*i*
alias:          pci:v0000168Cd00000036sv0000144Dsd0000411Abc*sc*i*
alias:          pci:v0000168Cd00000036sv00001028sd0000020Cbc*sc*i*
alias:          pci:v0000168Cd00000036sv0000103Csd00002005bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000103Csd0000217Fbc*sc*i*
alias:          pci:v0000168Cd00000036sv0000103Csd000018E3bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd0000213Cbc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd0000213Abc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000682bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd000006A2bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000662bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000672bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000622bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000185Fsd00003028bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000105Bsd0000E069bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000168Csd0000302Bbc*sc*i*
alias:          pci:v0000168Cd00000036sv0000168Csd00003026bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000168Csd00003025bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd00002F8Abc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd0000218Abc*sc*i*
alias:          pci:v0000168Cd00000036sv00001B9Asd000028A3bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001B9Asd000028A1bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001B9Asd00002812bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001B9Asd00002811bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00006671bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00001842bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000842bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd000006B2bc*sc*i*
alias:          pci:v0000168Cd00000036sv000011ADsd00000632bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000185Fsd0000A119bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000105Bsd0000E068bc*sc*i*
alias:          pci:v0000168Cd00000036sv00001A3Bsd00002176bc*sc*i*
alias:          pci:v0000168Cd00000036sv0000168Csd00003028bc*sc*i*
alias:          pci:v0000168Cd00000037sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000034sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000030sv00001A56sd00002003bc*sc*i*
alias:          pci:v0000168Cd00000034sv000010CFsd00001783bc*sc*i*
alias:          pci:v0000168Cd00000034sv000014CDsd00000064bc*sc*i*
alias:          pci:v0000168Cd00000034sv000014CDsd00000063bc*sc*i*
alias:          pci:v0000168Cd00000034sv0000103Csd00001864bc*sc*i*
alias:          pci:v0000168Cd00000034sv000011ADsd00006641bc*sc*i*
alias:          pci:v0000168Cd00000034sv000011ADsd00006631bc*sc*i*
alias:          pci:v0000168Cd00000034sv00001043sd0000850Ebc*sc*i*
alias:          pci:v0000168Cd00000034sv00001A3Bsd00002110bc*sc*i*
alias:          pci:v0000168Cd00000034sv00001969sd00000091bc*sc*i*
alias:          pci:v0000168Cd00000034sv000017AAsd00003214bc*sc*i*
alias:          pci:v0000168Cd00000034sv0000168Csd00003117bc*sc*i*
alias:          pci:v0000168Cd00000034sv000011ADsd00006661bc*sc*i*
alias:          pci:v0000168Cd00000034sv00001A3Bsd00002116bc*sc*i*
alias:          pci:v0000168Cd00000033sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000032sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001043sd0000850Dbc*sc*i*
alias:          pci:v0000168Cd00000032sv00001B9Asd00001C01bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001B9Asd00001C00bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00001F95bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00001195bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00001F86bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00001186bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001B9Asd00002001bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001B9Asd00002000bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000144Fsd00007197bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000105Bsd0000E04Fbc*sc*i*
alias:          pci:v0000168Cd00000032sv0000105Bsd0000E04Ebc*sc*i*
alias:          pci:v0000168Cd00000032sv000011ADsd00006628bc*sc*i*
alias:          pci:v0000168Cd00000032sv000011ADsd00006627bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001C56sd00004001bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00002100bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00002C97bc*sc*i*
alias:          pci:v0000168Cd00000032sv000017AAsd00003219bc*sc*i*
alias:          pci:v0000168Cd00000032sv000017AAsd00003218bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000144Dsd0000C708bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000144Dsd0000C680bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000144Dsd0000C706bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000144Dsd0000410Fbc*sc*i*
alias:          pci:v0000168Cd00000032sv0000144Dsd0000410Ebc*sc*i*
alias:          pci:v0000168Cd00000032sv0000144Dsd0000410Dbc*sc*i*
alias:          pci:v0000168Cd00000032sv0000144Dsd00004106bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000144Dsd00004105bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000185Fsd00003027bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000185Fsd00003119bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000168Csd00003122bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000168Csd00003119bc*sc*i*
alias:          pci:v0000168Cd00000032sv0000105Bsd0000E075bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00002152bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd0000126Abc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00002126bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00001237bc*sc*i*
alias:          pci:v0000168Cd00000032sv00001A3Bsd00002086bc*sc*i*
alias:          pci:v0000168Cd00000030sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000030sv00001A56sd00002001bc*sc*i*
alias:          pci:v0000168Cd00000030sv00001A56sd00002000bc*sc*i*
alias:          pci:v0000168Cd0000002Esv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000002Dsv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000002Csv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000002Bsv*sd*bc*sc*i*
alias:          pci:v0000168Cd0000002Bsv00001A3Bsd00002C37bc*sc*i*
alias:          pci:v0000168Cd0000002Asv000010CFsd00001536bc*sc*i*
alias:          pci:v0000168Cd0000002Asv000010CFsd0000147Dbc*sc*i*
alias:          pci:v0000168Cd0000002Asv000010CFsd0000147Cbc*sc*i*
alias:          pci:v0000168Cd0000002Asv0000185Fsd0000309Dbc*sc*i*
alias:          pci:v0000168Cd0000002Asv00001A32sd00000306bc*sc*i*
alias:          pci:v0000168Cd0000002Asv000011ADsd00006642bc*sc*i*
alias:          pci:v0000168Cd0000002Asv000011ADsd00006632bc*sc*i*
alias:          pci:v0000168Cd0000002Asv0000105Bsd0000E01Fbc*sc*i*
alias:          pci:v0000168Cd0000002Asv00001A3Bsd00001C71bc*sc*i*
alias:          pci:v0000168Cd0000002Asv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000029sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000027sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000024sv*sd*bc*sc*i*
alias:          pci:v0000168Cd00000023sv*sd*bc*sc*i*
alias:          platform:qca956x_wmac
alias:          platform:qca953x_wmac
alias:          platform:qca955x_wmac
alias:          platform:ar934x_wmac
alias:          platform:ar933x_wmac
alias:          platform:ath9k
depends:        ath9k_hw,mac80211,ath9k_common,led-class,cfg80211,ath
intree:         Y
vermagic:       4.1.13-gnu-1-lts SMP mod_unload modversions 686 
parm:           debug:Debugging mask (uint)
parm:           nohwcrypt:Disable hardware encryption (int)
parm:           blink:Enable LED blink on activity (int)
parm:           btcoex_enable:Enable wifi-BT coexistence (int)
parm:           bt_ant_diversity:Enable WLAN/BT RX antenna diversity (int)
parm:           ps_enable:Enable WLAN PowerSave (int)
--8<---------------cut here---------------end--------------->8---
--8<---------------cut here---------------start------------->8---
$ egrep '(vmx|svm)' /proc/cpuinfo
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc bts aperfmperf 
pni monitor vmx est tm2 xtpr pdcm dtherm
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc bts aperfmperf 
pni monitor vmx est tm2 xtpr pdcm dtherm
--8<---------------cut here---------------end--------------->8---



El miércoles 25 de noviembre del 2015 a las 0823 horas, Daniel Tarrero escribió:

> Hi again!
>
> sorry to hear that :( we have to keep putting the stick in the hole till
> the bug comes out :)
>
> i have a couple questions and a tweak worth to try:
> - which module/firmware do you use? the kernel's ath9k module?
>       $ lsmod | grep ath
>       $ dmesg | grep firmware
>
> - which options does this module support?
>       $ modinfo ath9k
>
> - which processor do you have? has it virtualization supporT?
>       $ egrep '(vmx|svm)' /proc/cpuinfo
>
> ----------
> - virtualization tecnologies have cause this kind of conflicts in the
> past, so try this if you see output from the previous command:
>       kernel boot parameter "intel_iommu=off"
>
> - atheros driver tweaks: we will see which module options can we adjust
> from the modinfo command :)
>
>
> luck and regards!
> D
>
>
>
>       
>       
>
> El sáb, 21-11-2015 a las 15:19 -0600, Jorge Araya Navarro escribió:
>> Well, today the issue show his face again! :( You were right, the kernel 
>> flag don't solve this
>> problem. However, after rebooting my laptop, the connection is stable, I 
>> don't experience the
>> reconnection-every-60-seconds-phase anymore.
>> 
>> I don't remember pasting the exact error message I get when the issue 
>> appears, in any case, here it
>> is:
>> 
>> --8<---------------cut here---------------start------------->8---
>> [  +0,116708] ath: phy0: Chip reset failed
>> [  +0,000007] ath: phy0: Unable to reset channel, reset status -22
>> [  +0,080357] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff 
>> AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
>> [  +0,000016] ath: phy0: Could not stop RX, we could be confusing the DMA 
>> engine when we start RX up
>> --8<---------------cut here---------------end--------------->8---
>> 
>> I was unable to reload the `ath` module, something start again 
>> NetworkManager's service when I stop
>> it with `systemctl stop NetworkManager`, `systemctl list-dependencies 
>> NetworkManager` shows many
>> services that I don't believe all of them depend on NetworkManager's service.
>> 
>> typing `sudo iwconfig wlp2s0 power off` doesn't work because that feature 
>> isn't supported by my wifi
>> card. The sound works well except for some sound glitches, but that happens 
>> because systemd-journal uses a
>> lot of CPU registering the never ending error message (the one above).
>> 
>> Here is the information you requested, hope this sheds some light with this 
>> problem:
>> 
>> --8<---------------cut here---------------start------------->8---
>> $ sudo journalctl -b -1 | grep DMA
>> nov 21 12:26:57 abril.charola kernel:   DMA      [mem 
>> 0x0000000000001000-0x0000000000ffffff]
>> nov 21 12:26:57 abril.charola kernel:   DMA zone: 40 pages used for memmap
>> nov 21 12:26:57 abril.charola kernel:   DMA zone: 0 pages reserved
>> nov 21 12:26:57 abril.charola kernel:   DMA zone: 3999 pages, LIFO batch:0
>> # [...]
>> nov 21 14:29:06 abril.charola kernel: ath: phy0: Failed to stop TX DMA, 
>> queues=0x008!
>> nov 21 14:29:06 abril.charola kernel: ath: phy0: DMA failed to stop in 10 ms 
>> AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
>> nov 21 14:29:06 abril.charola kernel: ath: phy0: Could not stop RX, we could 
>> be confusing the DMA engine when we start RX up
>> --8<---------------cut here---------------end--------------->8---
>> 
>> --8<---------------cut here---------------start------------->8---
>> $ lspci | grep -e Ethernet -e Network 
>> 01:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet 
>> Controller
>> 02:00.0 Network controller: Qualcomm Atheros AR9285 Wireless Network Adapter 
>> (PCI-Express) (rev 01)
>> --8<---------------cut here---------------end--------------->8---
>> 
>> --8<---------------cut here---------------start------------->8---
>> $ uname -a
>> Linux abril.charola 4.1.13-gnu-1-lts #1 SMP Sat Nov 14 09:15:27 UYT 2015 
>> i686 GNU/Linux
>> --8<---------------cut here---------------end--------------->8---
>> 
>> El lunes 16 de noviembre del 2015 a las 0340 horas, Daniel Tarrero escribió:
>> 
>> > Hi!
>> >
>> > This logs seem to me like an interrupt conflict, hardware failure, or
>> > unrecoverable state.
>> >
>> > I think that the kernel boot option "intremap" wont help you.
>> >
>> > Usually, remove and load again a module use to restablish it's
>> > functionallity (when succesfully performed). Of course, modules and
>> > kernel have a tree kind structure, so you have to unload its
>> > dependencies before unload a module.
>> >
>> > -----
>> > Things you can give a try:
>> >
>> > * Look for any other interesting messages during boot:
>> >
>> > $ dmesg | more
>> >
>> > ... and more concrete, boot messages about DMA:
>> >
>> > $ dmesg | grep DMA | more
>> >
>> > * Disable "suspend" mode of the card (maybe it enters suspension-mode
>> > and never come back: not all cards support suspension):
>> >
>> > $ sudo iwconfig wlan0 power off
>> >
>> > * I also would try to _disable_sound_card_ in BIOS, and see if that
>> > makes a difference with your Wifi crashes.
>> >
>> >
>> > ----------
>> > For more info:
>> >
>> > which wifi card you have?
>> >
>> > $ lspci
>> > $ lsusb
>> >
>> > which kernel you have?
>> >
>> > $ uname -a
>> >
>> > is this the propper list for that?
>> >
>> > probably not ^^
>> >
>> >
>> > good morning dudes!
>> > Dani
>> >
>> >
>> > El vie, 13-11-2015 a las 12:47 -0600, Jorge Araya Navarro escribió:
>> >> Yo! lol.
>> >> 
>> >> When this thing happens, I don't have anything playing sounds, so I'm
>> >> not sure if the sound card gets affected. I wonder if setting that
>> >> kernel flag will prevent this issue from happening. I also too wonder if
>> >> unloading and reloading the drivers will do something useful regarding
>> >> my issue.
>> >> 
>> >> I'm going to set the flag and came back here if something happens.
>> >> 
>> >> El viernes 13 de noviembre del 2015 a las 0534 horas, Daniel Tarrero 
>> >> escribió:
>> >> 
>> >> > Que pasa Jorge!!
>> >> >
>> >> > The soon i talk about interrupts, the soon somebody faces problems using
>> >> > them!! maybe :)
>> >> >
>> >> > This seem to be a hardware communication problem. Did you read my last
>> >> > two mails? they may bring some information related to this problems.
>> >> >
>> >> >>> Did you see the DMAR mapping Warning too during boot?? that can have
>> >> > something to say here. The fact that a reboot use to solve it, makes me
>> >> > think it can be an interrupt conflict.
>> >> >
>> >> > Your logs say: "module/driver is sending commands to hardware, and it
>> >> > didnt respond as we expected"
>> >> >
>> >> > What can cause this? DMAR mess!!! and also hardware problems, like loose
>> >> > of power, changes in hardware that derives in interrupt conflicts like
>> >> > pluggin an e-sata, or faulty Atheros chip in the worse case.
>> >> >
>> >> > You can _force_ module unload (and also, you can
>> >> > _unload_dependent_modules_ first). Of course, you have to stop software
>> >> > using this hardware too. Maybe something like can make your day:
>> >> >
>> >> > $ sudo service network-manager stop (stop software)
>> >> > $ sudo ifconfig whatever down (unload network)
>> >> > $ modprobe -n ath (see dependent modules)
>> >> > $ sudo modprobe -f whatever (unload dependencies first)
>> >> > $ sudo modprobe -f ath (unload module)
>> >> > $ sudo modprobe ath (reload module)
>> >> >
>> >> > and test!
>> >> > You should give some time to the commands to complete, and keep an eye
>> >> > in syslog/dmesg to see resoults.
>> >> >
>> >> > Given that the problem flaps (come and go), i would also check power and
>> >> > heat (maybe replace charger with a travel one if you have, and place the
>> >> > laptop in a cold environment), and see if fault time changes.
>> >> >
>> >> > Also there is a previous warning with your sound card that can be
>> >> > related:
>> >> > snd_hda_intel 0000:00:1b.0: IRQ timing workaround is activated for card
>> >> > #0
>> >> >
>> >> > Is your sound card working when this error happens? If not, we may have
>> >> > found the hardware interrupt conflict. They can be using the same
>> >> > interrupt, and when sound gets "tweaked" the wifi goes crazy about that
>> >> > delay in communications.
>> >> >
>> >> >
>> >> > Good luck!! Im waiting for your experiences! :)
>> >> >
>> >> > Regards,
>> >> > D
>> >> >
>> >> >
>> >> > El jue, 12-11-2015 a las 14:44 -0600, Jorge Araya Navarro escribió:
>> >> >> Hello!
>> >> >> 
>> >> >> I bought my Libreboot T60 from Gluglug in December of last year, and 
>> >> >> I'm very happy with a machine
>> >> >> which works with 100% Free Software!
>> >> >> 
>> >> >> Since a couple of months ago is happening something strange to my wifi 
>> >> >> card, I first thought the
>> >> >> issue was caused by a kernel update but I was wrong. What happens is 
>> >> >> that at any random moment every
>> >> >> many or so weeks the wifi will drop the connection to never 
>> >> >> re-establish it again, until reboot, and
>> >> >> after that sometimes the issue continues with the wifi card dropping 
>> >> >> the connection once every 60
>> >> >> seconds.
>> >> >> 
>> >> >> Yesterday this thing happened again, so I decided to fire Emacs and 
>> >> >> takes some notes and output with
>> >> >> org-mode. The first interesting thing is this from `dmesg`:
>> >> >> 
>> >> >> --8<---------------cut here---------------start------------->8---
>> >> >> nov 12 12:43:43 abril.charola kernel: snd_hda_intel 0000:00:1b.0: IRQ 
>> >> >> timing workaround is activated for card #0. Suggest a bigger 
>> >> >> bdl_pos_adj.
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Failed to stop TX 
>> >> >> DMA, queues=0x00a!
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: DMA failed to stop in 
>> >> >> 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Could not stop RX, we 
>> >> >> could be confusing the DMA engine when we start RX up
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Chip reset failed
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Unable to reset 
>> >> >> channel, reset status -22
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: DMA failed to stop in 
>> >> >> 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Could not stop RX, we 
>> >> >> could be confusing the DMA engine when we start RX up
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Chip reset failed
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Unable to reset 
>> >> >> channel, reset status -22
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: DMA failed to stop in 
>> >> >> 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Could not stop RX, we 
>> >> >> could be confusing the DMA engine when we start RX up
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Chip reset failed
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Unable to reset 
>> >> >> channel, reset status -22
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: DMA failed to stop in 
>> >> >> 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Could not stop RX, we 
>> >> >> could be confusing the DMA engine when we start RX up
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Chip reset failed
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Unable to reset 
>> >> >> channel, reset status -22
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: DMA failed to stop in 
>> >> >> 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
>> >> >> nov 12 12:43:44 abril.charola kernel: ath: phy0: Could not stop RX, we 
>> >> >> could be confusing the DMA engine when we start RX up
>> >> >> nov 12 12:43:45 abril.charola kernel: ath: phy0: Chip reset failed
>> >> >> nov 12 12:43:45 abril.charola kernel: ath: phy0: Unable to reset 
>> >> >> channel, reset status -22
>> >> >> nov 12 12:43:45 abril.charola kernel: ath: phy0: DMA failed to stop in 
>> >> >> 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
>> >> >> nov 12 12:43:45 abril.charola kernel: ath: phy0: Could not stop RX, we 
>> >> >> could be confusing the DMA engine when we start RX up
>> >> >> nov 12 12:43:45 abril.charola kernel: ath: phy0: Chip reset failed
>> >> >> nov 12 12:43:45 abril.charola kernel: ath: phy0: Unable to reset 
>> >> >> channel, reset status -22
>> >> >> nov 12 12:43:45 abril.charola NetworkManager[445]: <warn>  Connection 
>> >> >> disconnected (reason -4)
>> >> >> nov 12 12:43:45 abril.charola NetworkManager[445]: <info>  (wlp2s0): 
>> >> >> supplicant interface state: completed -> disconnected
>> >> >> nov 12 12:43:45 abril.charola kernel: cfg80211: Exceeded CRDA call max 
>> >> >> attempts. Not calling CRDA
>> >> >> nov 12 12:43:45 abril.charola kernel: ath: phy0: DMA failed to stop in 
>> >> >> 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
>> >> >> nov 12 12:43:45 abril.charola kernel: ath: phy0: Could not stop RX, we 
>> >> >> could be confusing the DMA engine when we start RX up
>> >> >> nov 12 12:43:45 abril.charola NetworkManager[445]: <info>  (wlp2s0): 
>> >> >> supplicant interface state: disconnected -> scanning
>> >> >> --8<---------------cut here---------------end--------------->8---
>> >> >> 
>> >> >> As I don't understand anything with such error messages, my guess is 
>> >> >> that it is something
>> >> >> serious. after trying to unload the modules related to my wifi driver 
>> >> >> (ath (which is impossible
>> >> >> because other modules requiring it are being use)) and typing 
>> >> >> `ifconfig wlp2s0 down` and what not, I
>> >> >> just gave up and restart my laptop. At some point journald register 
>> >> >> something interesting:
>> >> >> 
>> >> >> --8<---------------cut here---------------start------------->8---
>> >> >> nov 12 12:44:00 abril.charola kernel: irq 17: nobody cared (try 
>> >> >> booting with the "irqpoll" option)
>> >> >> nov 12 12:44:00 abril.charola kernel: CPU: 0 PID: 0 Comm: swapper/0 
>> >> >> Not tainted 4.1.11-gnu-1-lts #1
>> >> >> nov 12 12:44:00 abril.charola kernel: Hardware name: LENOVO 
>> >> >> 1951F8G/1951F8G, BIOS CBET4000 79ETE7WW (2.27 ) 05/18/2015
>> >> >> nov 12 12:44:00 abril.charola kernel:  c1609907 4a9301f9 00000000 
>> >> >> f5035f54 c14a49ec f53d0e9c f5035f74 c10abbac
>> >> >> nov 12 12:44:00 abril.charola kernel:  c1575cc0 00000011 f5035f70 
>> >> >> f85611db f53d0e40 00000000 f5035f98 c10abf22
>> >> >> nov 12 12:44:00 abril.charola kernel:  c1329d4a 0003ab5e 00000000 
>> >> >> 4a9301f9 f53d0e40 c1676e00 00000000 f5035fd4
>> >> >> nov 12 12:44:00 abril.charola kernel: Call Trace:
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c14a49ec>] 
>> >> >> dump_stack+0x41/0x52
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c10abbac>] 
>> >> >> __report_bad_irq+0x2c/0xd0
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<f85611db>] ? 
>> >> >> ath9k_hw_intrpend+0x5b/0x70 [ath9k_hw]
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c10abf22>] 
>> >> >> note_interrupt+0x212/0x250
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c1329d4a>] ? 
>> >> >> add_interrupt_randomness+0x16a/0x1a0
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c10a99a2>] 
>> >> >> handle_irq_event_percpu+0x122/0x190
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c10a99a2>] ? 
>> >> >> handle_irq_event_percpu+0x122/0x190
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c10a9a3a>] 
>> >> >> handle_irq_event+0x2a/0x50
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c10ac520>] ? 
>> >> >> handle_edge_irq+0xe0/0xe0
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c10ac589>] 
>> >> >> handle_fasteoi_irq+0x69/0x100
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c1004906>] 
>> >> >> handle_irq+0x56/0x90
>> >> >> nov 12 12:44:00 abril.charola kernel:  <IRQ>  [<c14aa60c>] 
>> >> >> do_IRQ+0x3c/0xd0
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c14a9c33>] 
>> >> >> common_interrupt+0x33/0x38
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c138a553>] ? 
>> >> >> cpuidle_enter_state+0x83/0x240
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c138a744>] 
>> >> >> cpuidle_enter+0x14/0x20
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c108fe89>] 
>> >> >> cpu_startup_entry+0x299/0x3a0
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c14a1f67>] rest_init+0x67/0x70
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c167eb51>] 
>> >> >> start_kernel+0x3c9/0x3e2
>> >> >> nov 12 12:44:00 abril.charola kernel:  [<c167e2e3>] 
>> >> >> i386_start_kernel+0x91/0x95
>> >> >> nov 12 12:44:00 abril.charola kernel: handlers:
>> >> >> nov 12 12:44:00 abril.charola kernel: [<f81083c0>] usb_hcd_irq 
>> >> >> [usbcore]
>> >> >> nov 12 12:44:00 abril.charola kernel: [<f860a890>] ath_isr [ath9k]
>> >> >> nov 12 12:44:00 abril.charola kernel: Disabling IRQ #17
>> >> >> --8<---------------cut here---------------end--------------->8---
>> >> >> 
>> >> >> Again, I don't know what it says but seems very serious. I'll attach 
>> >> >> the full logs in case what I
>> >> >> provide is not enough. Hope someone can help me with this.
>> >> >> 
>> >> >> P.S.: I haven't clean my laptop from dust since I bought it, and it 
>> >> >> seems it have some inside, this
>> >> >> sporadic issue can be caused by the dust, too.
>> >> >> 
>> >> 
>> 

-- 
👋 Pax et bonum.
Jorge Araya Navarro
https://es.gravatar.com/shackra