I'm also experiencing this problem after upgrading to Ubuntu 19.10. I'm using xserver-xorg-video-amdgpu 19.0.1-1ubuntu1 so either it's not completely fixed, or I'm experiencing a different but very similar issue.
One of the linked bug reports suggested the crash occurs in the XFCE compositor. I tried disabling the compositor: xfconf-query -c xfwm4 -p /general/use_compositing -s false This seems to be a usable workaround for now, though it does introduce some visual glitches. -- More detail: After booting to login screen, if I select an "XFCE" or "Xubuntu" session and log in, the system crashes to a black screen and is unresponsive to Ctrl-Alt-F2 or Ctrl-Alt-Del or anything else I try. (Alt+SysRq+b does reboot though.) Selecting an "Ubuntu" session is fine. After rebooting, I see 232 lines in syslog like this: WARNING: CPU: 2 PID: 274 at drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hw_sequencer.c:932 dcn10_verify_allow_pstate_change_high.cold+0xc/0x23d [amdgpu] -- Hardware and version info: $ cat /proc/cpuinfo model name : AMD Ryzen 5 2400G with Radeon Vega Graphics $ lsb_release -a Description: Ubuntu 19.10 Release: 19.10 Codename: eoan $ uname -r 5.3.0-23-generic $ apt show xserver-xorg Version: 1:7.7+19ubuntu12 $ apt show xserver-xorg-core Version: 2:1.20.5+git20191008-0ubuntu1 $ apt show xserver-xorg-video-amdgpu Version: 19.0.1-1ubuntu1 $ xfce4-session --version xfce4-session 4.14.0 (Xfce 4.14) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1842954 Title: AMD GPU hang/crash/black screen after suspend(ing) Status in Linux: Confirmed Status in xserver-xorg-video-amdgpu package in Ubuntu: Fix Released Bug description: This is a freeze which is obviously caused by a bug in the xserver- xorg-video-amdgpu package ver: 19.0.1* which is shipped with Ubuntu 19.04 and 19.10. Upstream fix is needed. Workaround: sudo nano /etc/apt/sources.list, copy-paste one line which contains "main multiverse universe restricted" and change the distribution name "eoan" or "disco" to "bionic" (for this line only) So you will have a line like deb [url] bionic multiverse main restricted universe ctrl+o, save it sudo update sudo apt install xserver-xorg-core=2:1.19.6-1ubuntu4 sudo apt install xserver-xorg-video-amdgpu=18.0.1-1 sudo reboot If everything is OK then you should keep these packages by using: sudo apt-mark hold xserver-xorg-core=2:1.19.6-1ubuntu4 sudo apt-mark hold xserver-xorg-video-amdgpu=18.0.1-1 You can later unhold them by using the same commands with "unhold" If a newer bionic package version comes out (fe. a security update) you should unhold the packages do an apt update and use apt policy [package name without = and version] to check the new bionic versions that you can install using my original install commands with the proper version paramter. If something is not OK, then press E on grub menu, paste nomodeset parameter at the and of the kernel line then f10. After the kernel loading and the command line login you should just do an apt upgrade if you hadn't held the packages before. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1842954/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
