Sorry, I made a mistake I'm running kubuntu (not Ubuntu like mentioned in #24).
Indeed I can confirm that with a switched off compositor resume will work. And I can confirm that resume only fails the first time after a power up reset of the computer. When the screen turn blank after the first time resume I do a login via SSH and initiate a reboot. After this all suspend / resume cycles will work perfectly. It is strange that a compositor's bug will affect the amdgpu driver module. This snippet of journalctl log shows a line emitted by the amdgpu module where a test runs into a timeout: Feb 27 10:43:02 Lin kernel: PM: suspend exit Feb 27 10:43:02 Lin systemd-sleep[2125]: System resumed. Feb 27 10:43:02 Lin kernel: [drm] pstate TEST_DEBUG_DATA: 0xB7F60000 Feb 27 10:43:02 Lin kernel: ------------[ cut here ]------------ Feb 27 10:43:02 Lin kernel: WARNING: CPU: 2 PID: 2191 at /build/linux-hwe-LNyirI/linux-hwe-5.3.0/drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hw_sequencer.c:932 dcn10_verify_allow_pstate_change_high+0x37/0x2d0 [amdgpu] I've attached the log parts of a failing resume (compositor is switched on): * 10:40 Start * 10:42 Suspend 1st time * 10:43 Resume 1st time * 10:45 reboot * 10:46 Suspend 2nd time * 10:47 Resume second time I think I'll try the workaround mentioned in https://forum.manjaro.org/t /lenovo-laptop-wont-resume-after-sleep/105233/27 ** Attachment added: "journalctl-20200227-resume-kwin.txt" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-amdgpu/+bug/1849084/+attachment/5331541/+files/journalctl-20200227-resume-kwin.txt -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1849084 Title: Freeze on system-resume caused by kwin and amdgpu driver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kwin/+bug/1849084/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
