Bug 616326

Summary:	sys-kernel/gentoo-sources, amdgpu, AMD HD79xx, HDMI: graphical corruption
Product:	Gentoo Linux	Reporter:	Sietze Post <priveinformatie>
Component:	Current packages	Assignee:	Gentoo Kernel Bug Wranglers and Kernel Maintainers <kernel>
Status:	RESOLVED NEEDINFO
Severity:	trivial
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	amdgpu-tahiti-hdmi-CEA-infoframe-packets.patch emerge --info

Description Sietze Post 2017-04-22 16:00:21 UTC

Created attachment 470670 [details, diff]
amdgpu-tahiti-hdmi-CEA-infoframe-packets.patch

On installing an XFX R7950, with 1 direct HDMI (card) to HDMI (monitor) connection an old (kernel 2.6+) issue returned for me:

A vertical line of 2 pixels on the left of the screen, and a resolution of 1922x1200 as reported by the monitor, whilst X reports 1920x1200.

After a log of digging I found this bug report:
https://bugs.freedesktop.org/show_bug.cgi?id=27452

Apparently there is an issue with HDMI and audio, and the packets received over HDMI by the monitor. 

I have ported the same patch from radeon to amdgpu, and all seems to work here. I don't have any other video cards lying around to test this more extensively, and currently my desktop machines are all bleeding edge with silly compiler flags enabled. Might this be interesting for the experimental patches? Or should this be reported upstream?


See also:
https://bugs.gentoo.org/show_bug.cgi?id=413981

Comment 1 Sietze Post 2017-04-22 16:01:37 UTC

Created attachment 470672 [details]
emerge --info

emerge --info output

Comment 2 Mike Pagano gentoo-dev

2018-06-13 13:51:54 UTC

Is this still an issue with more recent kernels?