amdgpu: [powerplay] Failed to send message errors

[Judson Wilson]

When using multiple monitors with amd gpus (actually, 2 amd gpus in my case), I get a many-seconds graphics lockup after the login screen, while trying to switch to the desktop view.

In dmesg I see many messsages about "amdgpu: [powerplay] Failed to send message errors".

This looks like a known deadlock issue in some 5.x kernels, but is supposedly fixed in 5.6-rc2.

See discussion here:

https://bugs.freedesktop.org/show_bug.cgi?id=111555

This bug degrades the experience to the point where the computer is not usable for every-day work, although it functions enough to do debugging.

Restarting the computer with one of the displays unplugged makes the initial symptoms go away, and the system seems usable, although I am still getting some strange lockup issues with the display at shutdown. The terminal reports stack traces with amdgpu calls. (I may file a separate bug for that issue.)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-24-generic 5.4.0-24.28
ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
Uname: Linux 5.4.0-24-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: judson 1879 F.... pulseaudio
 /dev/snd/controlC1: judson 1879 F.... pulseaudio
 /dev/snd/controlC0: judson 1879 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 17 23:19:33 2020
InstallationDate: Installed on 2020-04-17 (1 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
IwConfig:
 lo no wireless extensions.

 enp34s0 no wireless extensions.
MachineType: Micro-Star International Co., Ltd. MS-7B79
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-24-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-24-generic N/A
 linux-backports-modules-5.4.0-24-generic N/A
 linux-firmware 1.187
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/11/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: A.G0
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: X470 GAMING PLUS (MS-7B79)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 2.0
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 2.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrA.G0:bd11/11/2019:svnMicro-StarInternationalCo.,Ltd.:pnMS-7B79:pvr2.0:rvnMicro-StarInternationalCo.,Ltd.:rnX470GAMINGPLUS(MS-7B79):rvr2.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr2.0:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: MS-7B79
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 2.0
dmi.sys.vendor: Micro-Star International Co., Ltd.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.