Comment 22 for bug 2038998

The graphic glitch just happened on my system (Ubuntu 23.10, Lenovo ThinkPad T14 Gen 2a with AMD Ryzen™ 5 PRO 5650U with Radeon™ Graphics × 12) again. I have `COGL_DEBUG=disable-batching` set in /etc/environment. Furthermore all extensions are deactivated (however, not deleted). System was also rebooted.

Interestingly, this time it did not occur to an XWayland window. I configured chrome to run wayland directly (which decreased the frequency of the error occuring, at least it seemed like it).

Here dmesg:

[70061.823842] amdgpu 0000:07:00.0: amdgpu: [gfxhub0] no-retry page fault (src_id:0 ring:24 vmid:1 pasid:32771, for process chrome pid 5084 thread chrome:cs0 pid 5121)
[70061.823858] amdgpu 0000:07:00.0: amdgpu: in page starting at address 0x0000000c5de7b000 from IH client 0x1b (UTCL2)
[70061.823865] amdgpu 0000:07:00.0: amdgpu: VM_L2_PROTECTION_FAULT_STATUS:0x00100430
[70061.823869] amdgpu 0000:07:00.0: amdgpu: Faulty UTCL2 client ID: IA (0x2)
[70061.823873] amdgpu 0000:07:00.0: amdgpu: MORE_FAULTS: 0x0
[70061.823877] amdgpu 0000:07:00.0: amdgpu: WALKER_ERROR: 0x0
[70061.823880] amdgpu 0000:07:00.0: amdgpu: PERMISSION_FAULTS: 0x3
[70061.823883] amdgpu 0000:07:00.0: amdgpu: MAPPING_ERROR: 0x0
[70061.823886] amdgpu 0000:07:00.0: amdgpu: RW: 0x0

I might try to set the kernel parameter next. For clarification: I would add amdgpu.mcb=0 to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and then run 'sudo update-grub' (or update-grub2?). Afterwards I can just reboot?

BTW, just to rule other influences out: I do hibernate my system from time to time. This should not have any influence, or?