Public bug reported: 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. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 amdgpu apport-bug focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1873547 Title: amdgpu: [powerplay] Failed to send message errors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873547/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
