[Bug 1880041] Re: Failing to shutdown/power off or reboot on AMD Ryzen CPUs on kernel versions 5.3.0-52 and later

[Daniel Klein]

ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.15
Architecture: amd64
BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
DistUpgraded: Fresh install
DistroCodename: bionic
DistroRelease: Ubuntu 18.04
DistroVariant: ubuntu
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Vega 10 XT [Radeon RX Vega 64] [1002:687f] (rev c3) (prog-if 00 [VGA controller])
   Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Vega 10 XT [Radeon RX Vega 64] [1002:0b36]
InstallationDate: Installed on 2019-04-12 (422 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
MachineType: Micro-Star International Co., Ltd MS-7B86
Package: linux-meta-hwe
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.3.0-51-generic root=UUID=afdf9011-a57a-434a-bcb5-0587e1b57161 ro rootflags=subvol=@ quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 5.3.0-51.44~18.04.2-generic 5.3.18
Tags:  bionic ubuntu
Uname: Linux 5.3.0-51-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 09/21/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.20
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: B450 GAMING PLUS (MS-7B86)
dmi.board.vendor: Micro-Star International Co., Ltd
dmi.board.version: 1.0
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: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.20:bd09/21/2018:svnMicro-StarInternationalCo.,Ltd:pnMS-7B86:pvr1.0:rvnMicro-StarInternationalCo.,Ltd:rnB450GAMINGPLUS(MS-7B86):rvr1.0:cvnMicro-StarInternationalCo.,Ltd:ct3:cvr1.0:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: MS-7B86
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.99-1ubuntu1~18.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.8-0ubuntu0~18.04.3
version.libgl1-mesa-glx: libgl1-mesa-glx 19.2.8-0ubuntu0~18.04.3
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A


** Tags added: apport-collected bionic ubuntu

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https://bugs.launchpad.net/bugs/1880041

Title:
  Failing to shutdown/power off or reboot on AMD Ryzen CPUs on kernel
  versions 5.3.0-52 and later

Status in DRI:
  Unknown
Status in libdrm package in Ubuntu:
  Confirmed
Status in linux-meta-hwe package in Ubuntu:
  Confirmed

Bug description:
  When booting up Ubuntu 18.04 with a kernel version of 5.3.0-52 or
  later (including 5.3.0-53), everything seems to be working as usual.
  However, when I shutdown, the system will only soft shutdown, with the
  CPU still running at full power, forcing me to hold down the power
  button to fully power off affected systems. If I reboot, it will cause
  the system to hang and not respond. Either way, a hard reset or
  poweroff will be required, and this is not an option for systems being
  remotely accessed. It is not possible for me to collect kernel logs at
  this point, unless something wrong is happening in those kernel
  versions before the actual shutdown.

  It is possible that this may also occur on Ubuntu 20.04 with kernel
  versions 5.4.0-29 and later, but I have not yet tested this out. This
  problem is occurring on both my desktop and laptop computers which
  respectively are:

  * AsRock B450 Pro4 with AMD Ryzen 3 3200G APU
  * Lenovo ThinkPad A485 with AMD Ryzen 5 Pro 2500U mobile APU

  In the meantime, I am stuck on kernel version 5.3.0-51, as that is the
  last working 5.3.x kernel version offered in the standard Ubuntu
  repositories that doesn't have this problem, without me having to use
  PPAs. I don't know if this problem also occurs on systems with Intel
  CPUs, as I don't own any recently-made system (last 3 years from 2017)
  with such CPUs to test if this problem occurs on them.

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