@Richard: I tried your suggestion without luck. The screen remains black, the backlight was switched on. To verify I tried multiple times.
The only true workaround (with KDE) is to switch the compositor off before turning into sleep. You have to switch the compositor on after return from suspend. Somewhere I've found a systemctl script to manage this automatically, but I experienced the script's working not reliable. With KDE you have to press Shift-Alt-F12 to toggle manually the compositor's state. This is the output after returning from suspend with compositor switched off: klaus@Lin:~$ sudo systemctl status plasma-restart@$USER.service ● plasma-restart@klaus.service - Plasma Restart Service Loaded: loaded (/etc/systemd/system/plasma-restart@.service; indirect; vendor preset: enabled) Active: inactive (dead) Mai 03 16:20:59 Lin systemd[1]: plasma-restart@klaus.service: Unit not needed anymore. Stopping. Mai 03 16:20:59 Lin systemd[1]: plasma-restart@klaus.service: Failed to enqueue stop job, ignoring: Transaction is destructive. Mai 03 16:20:59 Lin systemd[1]: Starting Plasma Restart Service... Mai 03 16:20:59 Lin sudo[3652]: klaus : TTY=unknown ; PWD=/home/klaus ; USER=klaus ; COMMAND=/bin/bash -c pkill -ABRT plasmashell Mai 03 16:20:59 Lin sudo[3652]: pam_unix(sudo:session): session opened for user klaus by (uid=0) Mai 03 16:20:59 Lin sudo[3652]: pam_unix(sudo:session): session closed for user klaus Mai 03 16:20:59 Lin systemd[1]: Started Plasma Restart Service. Mai 03 16:20:59 Lin systemd[1]: plasma-restart@klaus.service: Unit not needed anymore. Stopping. Mai 03 16:20:59 Lin systemd[1]: Stopped Plasma Restart Service. Something seems to be wrong, but I'm not the specialist for systemctl scripts. Regards, Klaus -- 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/1849084 Title: Freeze on system-resume caused by kwin and amdgpu driver Status in kwin package in Ubuntu: Confirmed Status in linux package in Ubuntu: Confirmed Status in plasma-desktop package in Ubuntu: Confirmed Status in xserver-xorg-video-amdgpu package in Ubuntu: Confirmed Bug description: This is a well investigated bug by me. Problem: a black screen freeze occurs by suspend-resume process Ubuntu version: Kubuntu 19.10 default plasma, or the backported 5.17 Kernel version: default 5.3.10 or the mainline 5.4.0rc3 xserver-xorg-video-amdgpu: 19.* or the newest from git, the 18.0.1-1 works well This freeze can be reproduced only if opengl 2.0 or 3.1 compositor is enabled in Plasma settings. Xrender is OK however I don't like screen tearing. On Ubuntu 19.10 Gnome desktop (X based) this doesn't occur even if the Gnome's compositor is enabled. (I don't know what is the default one there but I haven't disabled it) I think this is a Kwin / amdgpu driver related bug because of the differentiation. These can be fixed even in Kwin/opengl compositor not just in the amdgpu driver or in kernel. One possible solution: disable opengl compositor by suspend and re- enable it after login. Use fe.: Xrender before login / before the system restored from suspend. For Ubuntu's maintainers: Couldn't be this problem solved by a downstream solution? Maybe a proper script could be enough by resume and by suspend. There are a lot of bugs like this reported in freedesktop bugreport and the developers haven't got enough time for fix them fast enough. Syslog: Oct 21 10:57:26 pc kernel: [ 9475.308852] Code: 85 78 ff ff ff e9 9f f8 ff ff 8b b0 98 04 00 00 48 c7 c7 ef 5f a5 c0 e8 49 2d 9d ff 44 0f b6 45 a3 49 8b 4d 08 e9 bf fa ff ff <0f> 0b e9 ca fb ff ff 0f 0b e8 7d 36 84 c1 66 66 2e 0f 1f 84 00 00 Oct 21 10:57:26 pc kernel: [ 9475.308853] RSP: 0018:ffffb7b54274b7b0 EFLAGS: 00010002 Oct 21 10:57:26 pc kernel: [ 9475.308855] RAX: 0000000000000202 RBX: 0000000000000202 RCX: 000000000000046a Oct 21 10:57:26 pc kernel: [ 9475.308856] RDX: 0000000000000001 RSI: 0000000000000202 RDI: 0000000000000002 Oct 21 10:57:26 pc kernel: [ 9475.308857] RBP: ffffb7b54274b870 R08: 0000000000000000 R09: ffff94da76b2d170 Oct 21 10:57:26 pc kernel: [ 9475.308858] R10: ffffb7b54274b708 R11: ffffb7b54274b70c R12: ffff94da76b2d000 Oct 21 10:57:26 pc kernel: [ 9475.308859] R13: ffff94d970f2c300 R14: ffff94da758d25d0 R15: ffff94da270d1400 Oct 21 10:57:26 pc kernel: [ 9475.308861] FS: 00007f2a1b9bea80(0000) GS:ffff94da87c40000(0000) knlGS:0000000000000000 Oct 21 10:57:26 pc kernel: [ 9475.308863] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Oct 21 10:57:26 pc kernel: [ 9475.308864] CR2: 00007fb083e9b4a5 CR3: 000000012c110000 CR4: 00000000003406e0 Oct 21 10:57:26 pc kernel: [ 9475.308865] Call Trace: Oct 21 10:57:26 pc kernel: [ 9475.308977] amdgpu_dm_atomic_commit_tail+0x96f/0x1030 [amdgpu] Oct 21 10:57:26 pc kernel: [ 9475.308991] commit_tail+0x50/0xc0 [drm_kms_helper] Oct 21 10:57:26 pc kernel: [ 9475.309000] ? commit_tail+0x50/0xc0 [drm_kms_helper] Oct 21 10:57:26 pc kernel: [ 9475.309009] drm_atomic_helper_commit+0x118/0x120 [drm_kms_helper] Oct 21 10:57:26 pc kernel: [ 9475.309115] amdgpu_dm_atomic_commit+0x95/0xa0 [amdgpu] Oct 21 10:57:26 pc kernel: [ 9475.309135] drm_atomic_commit+0x4a/0x50 [drm] Oct 21 10:57:26 pc kernel: [ 9475.309144] drm_atomic_helper_set_config+0x89/0xa0 [drm_kms_helper] Oct 21 10:57:26 pc kernel: [ 9475.309159] drm_mode_setcrtc+0x1cd/0x7a0 [drm] Oct 21 10:57:26 pc kernel: [ 9475.309234] ? amdgpu_cs_wait_ioctl+0xd6/0x150 [amdgpu] Oct 21 10:57:26 pc kernel: [ 9475.309249] ? drm_mode_getcrtc+0x190/0x190 [drm] Oct 21 10:57:26 pc kernel: [ 9475.309262] drm_ioctl_kernel+0xae/0xf0 [drm] Oct 21 10:57:26 pc kernel: [ 9475.309276] drm_ioctl+0x234/0x3d0 [drm] Oct 21 10:57:26 pc kernel: [ 9475.309290] ? drm_mode_getcrtc+0x190/0x190 [drm] Oct 21 10:57:26 pc kernel: [ 9475.309370] amdgpu_drm_ioctl+0x4e/0x80 [amdgpu] Oct 21 10:57:26 pc kernel: [ 9475.309376] do_vfs_ioctl+0x407/0x670 Oct 21 10:57:26 pc kernel: [ 9475.309379] ? do_futex+0x10f/0x1e0 Oct 21 10:57:26 pc kernel: [ 9475.309382] ksys_ioctl+0x67/0x90 Oct 21 10:57:26 pc kernel: [ 9475.309384] __x64_sys_ioctl+0x1a/0x20 Oct 21 10:57:26 pc kernel: [ 9475.309388] do_syscall_64+0x57/0x190 Oct 21 10:57:26 pc kernel: [ 9475.309392] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Oct 21 10:57:26 pc kernel: [ 9475.309394] RIP: 0033:0x7f2a1bd0c67b Oct 21 10:57:26 pc kernel: [ 9475.309397] Code: 0f 1e fa 48 8b 05 15 28 0d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e5 27 0d 00 f7 d8 64 89 01 48 Oct 21 10:57:26 pc kernel: [ 9475.309398] RSP: 002b:00007ffe0e27c518 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 Oct 21 10:57:26 pc kernel: [ 9475.309400] RAX: ffffffffffffffda RBX: 00007ffe0e27c550 RCX: 00007f2a1bd0c67b Oct 21 10:57:26 pc kernel: [ 9475.309401] RDX: 00007ffe0e27c550 RSI: 00000000c06864a2 RDI: 000000000000000d Oct 21 10:57:26 pc kernel: [ 9475.309402] RBP: 00000000c06864a2 R08: 0000000000000000 R09: 0000562bcc215600 Oct 21 10:57:26 pc kernel: [ 9475.309403] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 Oct 21 10:57:26 pc kernel: [ 9475.309404] R13: 000000000000000d R14: 0000562bcb275db0 R15: 0000000000000000 Oct 21 10:57:26 pc kernel: [ 9475.309407] ---[ end trace cae28d1e69119104 ]--- Oct 21 10:57:26 pc kernel: [ 9475.309432] ------------[ cut here ]------------ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kwin/+bug/1849084/+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
