I am also experiencing this issue. I was using 18.04.5 and did not have the issue. I did a new install of 20.04 with the same hardware and the problem started. It continues after upgrade to 20.10.
~~~ user@8560w:~$ sudo lshw -C display [sudo] password for user: *-display description: VGA compatible controller product: Whistler [Radeon HD 6730M/6770M/7690M XT] vendor: Advanced Micro Devices, Inc. [AMD/ATI] physical id: 0 bus info: pci@0000:01:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: pm pciexpress msi vga_controller bus_master cap_list rom configuration: driver=radeon latency=0 resources: irq:44 memory:c0000000-cfffffff memory:d4400000-d441ffff ioport:4000(size=256) memory:c0000-dffff ~~~ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1863390 Title: GPU lockup ring 0 stalled for more than X msec To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1863390/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs