Bug 506580 - kscreen-doctor reports "Adaptive Sync: incapable", despite VRR being enabled and fully functional.
Summary: kscreen-doctor reports "Adaptive Sync: incapable", despite VRR being enabled ...
Status: RESOLVED INTENTIONAL
Alias: None
Product: KScreen
Classification: Plasma
Component: kscreen-doctor (other bugs)
Version First Reported In: 6.3.5
Platform: Gentoo Packages Linux
: NOR normal
Target Milestone: ---
Assignee: kscreen-bugs-null@kde.org
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-07-04 10:40 UTC by Steve Vialle
Modified: 2025-08-20 19:23 UTC (History)
2 users (show)

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Description Steve Vialle 2025-07-04 10:40:28 UTC 
Monitor EDID: 
Display supports continuous frequencies

/sys/kernel/debug/dri/0/DP-3/vrr_range: 
Min: 48
Max: 75

Xorg.0.log:
AMDGPU(0): VariableRefresh: enabled

Real-world test (github.com/Nixola/VRRTest + monitor OSD):
VRR is enabled and working, true monitor refresh rate tracks full-screen test FPS within expected range.

kscreendoctor -o:
Refresh Rate: 74972
Adaptive Sync: incapable

STEPS TO REPRODUCE
1. Set up VRR.
2. Observe "Window Manager" section of "Info Centre".
3. Observe "display configuration" KCM.

OBSERVED RESULT
Info Centre incorrectly states "Adaptive Sync: incapable" 
kscreendoctor incorrectly states "Adaptive Sync: incapable"
No mention of VRR or adaptive sync in display KCM.

EXPECTED RESULT
Plasma acknowledges reality, kscreen-doctor reports accurate information.

Operating System: Gentoo Linux 2.17
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.13.0
Qt Version: 6.9.1
Kernel Version: 6.6.94-gentoo-dist (64-bit)
Graphics Platform: X11
Processors: 20 × Intel® Core™ i9-10900KF CPU @ 3.70GHz
Memory: 62.7 GiB of RAM
Graphics Processor: AMD Radeon RX 6700 XT
Manufacturer: ASUS
Comment 1 Zamundaaa 2025-08-20 19:23:52 UTC 
We don't support these features on Xorg. We couldn't even if we wanted to, as they're driver specific and require editing configs with root privileges.