Bug 32235 - Kernel > 6.0.9 disable color saturation (vibrancy) correction on some amd gpu
Summary: Kernel > 6.0.9 disable color saturation (vibrancy) correction on some amd gpu
Status: RESOLVED FIXED
Alias: None
Product: Mageia
Classification: Unclassified
Component: RPM Packages (show other bugs)
Version: 9
Hardware: All Linux
Priority: Normal normal
Target Milestone: ---
Assignee: Kernel and Drivers maintainers
QA Contact:
URL: https://git.kernel.org/pub/scm/linux/...
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-09-03 20:54 CEST by Julien Moragny
Modified: 2023-12-02 14:07 CET (History)
2 users (show)

See Also:
Source RPM: kernel-6.4.9-4.mga9.src.rpm
CVE:
Status comment:

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Description Julien Moragny 2023-09-03 20:54:07 CEST 
Hello,

I just updated to mga9 and my script to correct colour saturation, which rely on libvibrant is broken.

After some investigation, I observed the absence of this properties (displayed by xrandr --prop) :
	GAMMA_LUT_SIZE: 4096 
		range: (0, -1)
	DEGAMMA_LUT_SIZE: 4096 
		range: (0, -1)
	GAMMA_LUT: 0 
		range: (0, 65535)
	CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 
		0 1 
	DEGAMMA_LUT: 0 
		range: (0, 65535)

I managed to pinpoint the issue to this commit in kernel :
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0e444a4de6b38c4593a07e4cfb5bf54c40cc79b6
https://lists.freedesktop.org/archives/dri-devel/2022-November/378252.html


Reversing the patch restore the previous behaviour, the aforementioned properties are present and I can correct colour saturation.

I'm using an AMD radeon RX570 (codename POLARIS) which is DCE 11.2 ( https://wiki.gentoo.org/wiki/AMDGPU )

Can we reverse this in mageia ? 

thanks

Julien
Julien Moragny 2023-09-03 20:54:20 CEST

CC: (none) => julien.moragny

Comment 1 Lewis Smith 2023-09-03 21:17:32 CEST 
Thank you for this report, and learned investigation: identifying the kernel patch which caused the problem! Formidable.

As such, assigning to the kernel maintainer.

Assignee: bugsquad => kernel

Julien Moragny 2023-09-04 21:24:30 CEST

Summary: Kernel > 6.0.9 disable color saturation (vibrancy) correction => Kernel > 6.0.9 disable color saturation (vibrancy) correction on some amd gpu

Comment 2 Julien Moragny 2023-11-01 19:54:58 CET 
Hello,

the problem is still present in latest kernel 6.4.16

thanks.
Comment 3 Giuseppe Ghibò 2023-11-01 22:47:24 CET 
Does kernel-6.5.9-1.mga9 showing the same in backports_testing?

CC: (none) => ghibomgx

Comment 4 Julien Moragny 2023-11-02 22:02:32 CET 
Hello,

it's the same with the kernel 6.5.9-1 ; the properties are absent and I can't change vibrancy:

[jules@tue-amour ~]$ uname -a
Linux tue-amour 6.5.9-desktop-1.mga9 #1 SMP PREEMPT_DYNAMIC Tue Oct 31 03:01:01 UTC 2023 x86_64 GNU/Linux
[jules@tue-amour ~]$ $HOME/devel/libvibrant-legacy/build/vibrant-cli/vibrant-cli HDMI-A-0
libvibrant version 1.0.2
Cannot find output HDMI-A-0 in the list of supported outputs, it either does not exist or is not supported
[jules@tue-amour ~]$ xrandr --prop |grep LUT
[jules@tue-amour ~]$ 


thanks
Comment 5 Julien Moragny 2023-12-02 14:07:56 CET 
Hello,

The last update of kernel (6.5.11-5) carrys the revert and fix my problem.

Thanks alot.

Regard 
julien

FWIW, here is the upstream bug
 https://gitlab.freedesktop.org/drm/amd/-/issues/2974

Status: NEW => RESOLVED
Resolution: (none) => FIXED
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