EMU 1212m card (emu10k1 driver) stops working after PCI reset snd_emu10k1 invalid position buffer size

[Kamyar Kaviani]

After using my computer for a day or so and coming back to it, my sound card, EMU 1212m, randomly stops to work. And the only solution I have found is completely turn off the power to the motherboard and wait a few minutes until powering back on.

When the card works, I am able to reproduce the problem after typing:

sudo echo 1 > /sys/bus/pci/devices/0000:05:04.0/reset

Executing that command stops the card from outputting any sound, and I see the following printed in dmesg:

[ 73.029029] snd_pcm_update_hw_ptr0: 3153 callbacks suppressed
[ 73.029033] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384
[ 73.029114] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384
[ 73.029122] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384
[ 73.040768] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384
[ 73.046208] snd_emu10k1 0000:05:04.0: interrupt: PCI error
[ 73.046235] AMD-Vi: Event logged [IO_PAGE_FAULT device=05:00.0 domain=0x0015 address=0x0 flags=0x0000]
[ 73.046244] AMD-Vi: Event logged [IO_PAGE_FAULT device=05:00.0 domain=0x0015 address=0x0 flags=0x0000]
[ 73.046250] AMD-Vi: Event logged [IO_PAGE_FAULT device=05:00.0 domain=0x0015 address=0x0 flags=0x0000]
[ 73.046255] AMD-Vi: Event logged [IO_PAGE_FAULT device=05:00.0 domain=0x0015 address=0x0 flags=0x0000]
[ 73.046261] AMD-Vi: Event logged [IO_PAGE_FAULT device=05:00.0 domain=0x0015 address=0x0 flags=0x0000]
[ 73.046266] AMD-Vi: Event logged [IO_PAGE_FAULT device=05:00.0 domain=0x0015 address=0x0 flags=0x0000]

Further resets result in

[ 497.663897] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384
[ 497.663971] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384
[ 497.663997] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384
[ 497.674025] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384
[ 497.684046] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384
[ 497.694065] snd_emu10k1 0000:05:04.0: invalid position: , pos = 16759783, buffer size = 16384, period size = 16384

It seems this is a problem with the driver snd_emu10k1 (maybe invalid buffer size?). In the past, I have used this card in earlier Ubuntu's before without any issues. All I had to do was to build and install the latest alsa-firmware, alsa-lib, and alsa-utils from https://www.alsa-project.org/wiki/Download.

It's surprising that this card is not natively supported out of the box in 20.04, but even worse, the driver emu10k1 appears to be broken.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
Uname: Linux 5.4.0-40-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.3
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Jul 3 14:56:03 2020
InstallationDate: Installed on 2020-06-16 (17 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/12/2020
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1409
dmi.board.asset.tag: Default string
dmi.board.name: ROG STRIX X570-E GAMING
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1409:bd05/12/2020:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGSTRIXX570-EGAMING:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Kamyar Kaviani (kamyar-kaviani87)]

Here's t he information I got from alsa-info:

http://alsa-project.org/db/?f=0adb1150463e905a6584004021bacf1f11c850cc