Bug 219754

Summary:	When screen blanks and resumes there will be an error: kernel: amdgpu 0000:0b:00.0: [drm] REG_WAIT timeout 1us * 100 tries - dcn32_program_compbuf_size line:138
Product:	Drivers	Reporter:	Oliver Hildebrandt (ollilein)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	RESOLVED ANSWERED
Severity:	normal
Priority:	P3
Hardware:	All
OS:	Linux
Kernel Version:		Subsystem:
Regression:	No	Bisected commit-id:

Description Oliver Hildebrandt 2025-02-06 09:58:52 UTC

The bug appears since kernel 6.11.4. Everytime the screen blanks the following error will be displayed in the journalctl log:

kernel: amdgpu 0000:0b:00.0: [drm] REG_WAIT timeout 1us * 100 tries - dcn32_program_compbuf_size line:138

When the screen resumes (Not from Standby only when resuming from screen blanking)the following error appears:

kernel: amdgpu 0000:0b:00.0: [drm] REG_WAIT timeout 1us * 100 tries - dcn32_program_compbuf_size line:139

I have bisected the Kernel versions and until 6.11.3 the bug doesn't happen, first with 6.11.4 the bug appears.

I have no Problems with crashes or freezes, it is only this message in the logs.

At the moment i use kernel 6.13.1 but ia have tested kernel 6.14.0-rc1 where the bug also appears.

I use a PowerColor Radeon RX 7900 XT Hellhound OC for display.

If other Informations are needed i would happily provide it.

Comment 1 Artem S. Tashkinov 2025-02-06 18:07:06 UTC

Please repost here: https://gitlab.freedesktop.org/drm/amd/-/issues