https://bugs.kde.org/show_bug.cgi?id=505914
Bug ID: 505914
Summary: Fullscreen YouTube video flickering when using HDR
with Color Accuracy set to Prefer Efficiency
Classification: Plasma
Product: kwin
Version First 6.4.0
Reported In:
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: colour-management
Assignee: kwin-bugs-n...@kde.org
Reporter: j...@holodeck1.com
Target Milestone: ---
Created attachment 182482
--> https://bugs.kde.org/attachment.cgi?id=182482&action=edit
Recording of screen flickering
SUMMARY
I got access to a gaming HDR display (Dell G2724D) and am trying it out. What I
noticed is that when I watch YouTube videos and set the in fullscreen it was
flickering. This didn't happen if I opened PIP window of the video (in Firefox)
and maximised this PIP window. Also it appears it is only happening when HDR is
enabled and when Colour Accuracy setting is set to Prefer Efficiency. If set to
Prefer Color Accuracy there is no flickering. Also no flickering if I disable
HDR mode.
STEPS TO REPRODUCE
1. Enable HDR
2. Set Color Accuracy to Prefer Efficiency
3. Open Youtube Video in Firefox
4. Play it fullscreen (e.g. via pressing F key)
OBSERVED RESULT
Screen flickers as if some short clear white frames were shown in the middle of
the video (see attached video)
EXPECTED RESULT
Screen should not flicker and should play as in SDR or Prefer Color Accuracy
mode
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20250618
KDE Plasma Version: 6.4.0
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Kernel Version: 6.15.2-1-default (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 7840HS w/ Radeon 780M Graphics
Memory: 32 GiB of RAM (30.7 GiB usable)
Graphics Processor: AMD Radeon 780M
Manufacturer: SLIMBOOK
Product Name: EXCALIBUR-16-AMD7
ADDITIONAL INFORMATION
Firefox version: 139.0.4
Mesa: 25.1.3
--
You are receiving this mail because:
You are watching all bug changes.
