Suggested /etc/X11/xorg.conf file. I just edited it a bit... not really tested.
** Attachment added: "Suggested /etc/X11/xorg.conf file to work around the bug" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1944991/+attachment/5527755/+files/xorg.conf -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1944991 Title: Resume with glamor cause GPU lockup/screen corruption on Radeon 3100 Graphics" (ChipID = 0x9611) Status in linux package in Ubuntu: Incomplete Bug description: GPU: ATI Radeon 3100 Graphics (ChipID = 0x9611) (RS780) GPU Lockup message in dmesg output after resume: [ 916.000550] radeon 0000:01:05.0: ring 0 stalled for more than 10084msec [ 916.000569] radeon 0000:01:05.0: GPU lockup (current fence id 0x00000000000020cc last fence id 0x00000000000020d6 on ring 0) [ 916.516556] radeon 0000:01:05.0: ring 0 stalled for more than 10600msec [ 916.516569] radeon 0000:01:05.0: GPU lockup (current fence id 0x00000000000020cc last fence id 0x00000000000020d6 on ring 0) [ 917.024566] radeon 0000:01:05.0: ring 0 stalled for more than 11108msec [ 917.024575] radeon 0000:01:05.0: GPU lockup (current fence id 0x00000000000020cc last fence id 0x00000000000020d6 on ring 0) [ 917.536558] radeon 0000:01:05.0: ring 0 stalled for more than 11620msec [ 917.536570] radeon 0000:01:05.0: GPU lockup (current fence id 0x00000000000020cc last fence id 0x00000000000020d6 on ring 0) [ 918.048571] radeon 0000:01:05.0: ring 0 stalled for more than 12132msec [ 918.048580] radeon 0000:01:05.0: GPU lockup (current fence id 0x00000000000020cc last fence id 0x00000000000020d6 on ring 0) ... [ 935.726783] radeon 0000:01:05.0: GPU softreset: 0x00000019 [ 935.726788] radeon 0000:01:05.0: R_008010_GRBM_STATUS = 0xE57034E0 [ 935.726793] radeon 0000:01:05.0: R_008014_GRBM_STATUS2 = 0x00110103 [ 935.726797] radeon 0000:01:05.0: R_000E50_SRBM_STATUS = 0x20000040 [ 935.726801] radeon 0000:01:05.0: R_008674_CP_STALLED_STAT1 = 0x01000000 [ 935.726805] radeon 0000:01:05.0: R_008678_CP_STALLED_STAT2 = 0x00001002 [ 935.726809] radeon 0000:01:05.0: R_00867C_CP_BUSY_STAT = 0x00028486 [ 935.726813] radeon 0000:01:05.0: R_008680_CP_STAT = 0x80838645 [ 935.726817] radeon 0000:01:05.0: R_00D034_DMA_STATUS_REG = 0x44C83D57 [ 935.779906] radeon 0000:01:05.0: R_008020_GRBM_SOFT_RESET=0x00007FEF [ 935.779962] radeon 0000:01:05.0: SRBM_SOFT_RESET=0x00000100 [ 935.782061] radeon 0000:01:05.0: R_008010_GRBM_STATUS = 0xA0003030 [ 935.782066] radeon 0000:01:05.0: R_008014_GRBM_STATUS2 = 0x00000003 [ 935.782070] radeon 0000:01:05.0: R_000E50_SRBM_STATUS = 0x20008040 [ 935.782074] radeon 0000:01:05.0: R_008674_CP_STALLED_STAT1 = 0x00000000 [ 935.782078] radeon 0000:01:05.0: R_008678_CP_STALLED_STAT2 = 0x00000000 [ 935.782081] radeon 0000:01:05.0: R_00867C_CP_BUSY_STAT = 0x00000000 [ 935.782085] radeon 0000:01:05.0: R_008680_CP_STAT = 0x80100000 [ 935.782089] radeon 0000:01:05.0: R_00D034_DMA_STATUS_REG = 0x44C83D57 [ 935.782097] radeon 0000:01:05.0: GPU reset succeeded, trying to resume Graphics is broken... text hardly readable, interface not responding. First observed on latest Mint (20.2)... then discovered Peppermint 10 was not affected. I believe Peppermint 10 is based on 18.04 and I am unsure why it is not affected. I tested with many versions of Ubuntu... Before 17.04... no problem... but was using EXA acceleration. 17.04 first to use Glamor... screen corruption is not obvious... but dmesg show GPU lockup... 17.10 and following is really problematic after resume, but possible to Ctrl-Alt-F4 to go to a text console and ... sudo reboot. There is a possibility I missed the exact version as I don't have my notes near me. Adding Option "AccelMethod" "EXA" at the good place in xorg.conf file have fixed the issue. I am unlikely to have access again to that specific computer in the future. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1944991/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp