This happens regularly to me too. $ uname -a Linux ionian 5.4.0-54-generic #60-Ubuntu SMP Fri Nov 6 10:37:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux Ubuntu 20.04. ▐$ sudo dpkg -l | grep xserver-xorg-video ii xserver-xorg-video-all 1:7.7+19ubuntu14 amd64 X.Org X server -- output driver metapackage ii xserver-xorg-video-amdgpu 19.1.0-1 amd64 X.Org X server -- AMDGPU display driver ii xserver-xorg-video-ati 1:19.1.0-1 amd64 X.Org X server -- AMD/ATI display driver wrapper ii xserver-xorg-video-fbdev 1:0.5.0-1ubuntu1 amd64 X.Org X server -- fbdev display driver ii xserver-xorg-video-intel 2:2.99.917+git20200226-1 amd64 X.Org X server -- Intel i8xx, i9xx display driver rc xserver-xorg-video-modesetting 0.9.0-1build1 amd64 X.Org X server -- Generic modesetting driver ii xserver-xorg-video-nouveau 1:1.0.16-1 amd64 X.Org X server -- Nouveau display driver ii xserver-xorg-video-openchrome 1:0.6.0-3build1 amd64 X.Org X server -- OpenChrome display driver ii xserver-xorg-video-qxl 0.1.5+git20200331-1 amd64 X.Org X server -- QXL display driver ii xserver-xorg-video-radeon 1:19.1.0-1 amd64 X.Org X server -- AMD/ATI Radeon display driver ii xserver-xorg-video-vesa 1:2.4.0-2 amd64 X.Org X server -- VESA display driver ii xserver-xorg-video-vmware 1:13.3.0-3 amd64 X.Org X server -- VMware display driver journalctl gives this at the start of the crash. I coincides with starting Slack (the chat program, it uses google-chrome): Dec 09 08:56:07 ionian kernel: radeon 0000:01:00.0: ring 0 stalled for more than 10156msec Dec 09 08:56:07 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000010df8 last fence id 0x0000000000010e00 on ring 0) Dec 09 08:56:08 ionian kernel: radeon 0000:01:00.0: ring 3 stalled for more than 10216msec Dec 09 08:56:08 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000002eef last fence id 0x0000000000002ef1 on ring 3) Dec 09 08:56:08 ionian kernel: radeon 0000:01:00.0: ring 0 stalled for more than 10664msec Dec 09 08:56:08 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000010df8 last fence id 0x0000000000010e00 on ring 0) Dec 09 08:56:08 ionian kernel: radeon 0000:01:00.0: ring 3 stalled for more than 10728msec Dec 09 08:56:08 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000002eef last fence id 0x0000000000002ef1 on ring 3) Dec 09 08:56:09 ionian kernel: radeon 0000:01:00.0: ring 0 stalled for more than 11176msec Dec 09 08:56:09 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000010df8 last fence id 0x0000000000010e00 on ring 0) Dec 09 08:56:09 ionian kernel: radeon 0000:01:00.0: ring 3 stalled for more than 11240msec Dec 09 08:56:09 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000002eef last fence id 0x0000000000002ef1 on ring 3) Dec 09 08:56:09 ionian kernel: radeon 0000:01:00.0: ring 0 stalled for more than 11688msec Dec 09 08:56:09 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000010df8 last fence id 0x0000000000010e00 on ring 0) Dec 09 08:56:09 ionian kernel: radeon 0000:01:00.0: ring 3 stalled for more than 11756msec Dec 09 08:56:09 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000002eef last fence id 0x0000000000002ef1 on ring 3) Dec 09 08:56:10 ionian kernel: radeon 0000:01:00.0: ring 0 stalled for more than 12200msec Dec 09 08:56:10 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000010df8 last fence id 0x0000000000010e00 on ring 0) Dec 09 08:56:10 ionian /usr/lib/gdm3/gdm-x-session[5666]: [12/09/20, 08:56:10:433] info: [ACTION:CHANNEL-SIDEBAR] Selected GFFT85V5M After a while it goes in a loop like this, and the symptoms are the same as OP, no response from keyboard, screen freeze. The sound from my web meeting was still going though, if with some hickups (probably in phase with the radeon errors): Dec 09 08:56:18 ionian kernel: radeon 0000:01:00.0: GPU reset succeeded, trying to resume Dec 09 08:56:18 ionian kernel: [drm] PCIE gen 2 link speeds already enabled Dec 09 08:56:18 ionian kernel: radeon 0000:01:00.0: Wait for MC idle timedout ! Dec 09 08:56:18 ionian kernel: radeon 0000:01:00.0: Wait for MC idle timedout ! Dec 09 08:56:18 ionian kernel: [drm] PCIE GART of 1024M enabled (table at 0x000000000014C000). Dec 09 08:56:18 ionian kernel: radeon 0000:01:00.0: WB enabled Dec 09 08:56:18 ionian kernel: radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0x000000009ed2883c Dec 09 08:56:18 ionian kernel: radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0x00000000c6312e78 Dec 09 08:56:18 ionian kernel: radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c418 and cpu addr 0x0000000009b8d531 Dec 09 08:56:18 ionian kernel: [drm:r600_ring_test [radeon]] *ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD) Dec 09 08:56:18 ionian kernel: [drm:evergreen_resume [radeon]] *ERROR* evergreen startup failed on resume Dec 09 08:56:28 ionian kernel: radeon 0000:01:00.0: ring 0 stalled for more than 10176msec Dec 09 08:56:28 ionian kernel: radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000010df8 last fence id 0x0000000000010e18 on ring 0) Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: Saved 98855 dwords of commands on ring 0. Dec 09 08:56:29 ionian kernel: snd_hda_intel 0000:00:1b.0: Unstable LPIB (29688 >= 8192); disabling LPIB delay counting Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: GPU softreset: 0x0000001D Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: GRBM_STATUS = 0xA0003828 Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: GRBM_STATUS_SE0 = 0x00000007 Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: GRBM_STATUS_SE1 = 0x00000007 Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: SRBM_STATUS = 0x200006C0 Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: SRBM_STATUS2 = 0x00000000 Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: R_008674_CP_STALLED_STAT1 = 0x00000000 Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: R_008678_CP_STALLED_STAT2 = 0x00010002 Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: R_00867C_CP_BUSY_STAT = 0x00020182 Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: R_008680_CP_STAT = 0x80038243 Dec 09 08:56:29 ionian kernel: radeon 0000:01:00.0: R_00D034_DMA_STATUS_REG = 0x44C83D57 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: Wait for MC idle timedout ! Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: GRBM_SOFT_RESET=0x00007F6B Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: SRBM_SOFT_RESET=0x00100100 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: GRBM_STATUS = 0x00003828 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: GRBM_STATUS_SE0 = 0x00000007 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: GRBM_STATUS_SE1 = 0x00000007 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: SRBM_STATUS = 0x200006C0 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: SRBM_STATUS2 = 0x00000000 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: R_008674_CP_STALLED_STAT1 = 0x00000000 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: R_008678_CP_STALLED_STAT2 = 0x00000000 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: R_00867C_CP_BUSY_STAT = 0x00000000 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: R_008680_CP_STAT = 0x00000000 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: R_00D034_DMA_STATUS_REG = 0x44C83D57 Dec 09 08:56:30 ionian kernel: radeon 0000:01:00.0: GPU reset succeeded, trying to resume HD5770 Anything more I could send? Or do to fix it?