https://bugs.kde.org/show_bug.cgi?id=505625
Bug ID: 505625
Summary: kernel 6.15 flickering grey portion of screen at
higher refresh rates
Classification: Plasma
Product: kwin
Version First unspecified
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 182283
--> https://bugs.kde.org/attachment.cgi?id=182283&action=edit
flickering grey portion of screen
SUMMARY
Flickering grey bottom portion of the screen that fills a random amount of the
screen. Present when refresh rate set to 120Hz but disappears when switching to
60Hz.
In some cases it remains longer, this image was taken while most of the screen
remained grey until I moved the mouse.
Issue only appears to be present with kernel 6.15.* and disappears if I instead
load kernel `6.14.6-1-default`.
This may in fact be a kernel bug I have not been able to set refresh rates high
enough with other DEs to see if they are also affected.
STEPS TO REPRODUCE
1. boot KDE plasma 6 with kernel 6.15.*
2. set refresh rate to 120Hz+
3. use for a minute until it starts flickering
OBSERVED RESULT
Flickering grey bottom portion of screen, that takes up random amount of the
screen.
EXPECTED RESULT
Stable image.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.1
ADDITIONAL INFORMATION
```
System:
Kernel: 6.15.1-1-default arch: x86_64 bits: 64 compiler: gcc v: 14.3.0
clocksource: tsc avail: hpet,acpi_pm
parameters: BOOT_IMAGE=/boot/vmlinuz-6.15.1-1-default
root=UUID=71572811-269b-4ced-88d0-74f348f8a78f splash=silent quiet
security=apparmor amd_pstate=guided mitigations=auto
Desktop: KDE Plasma v: 6.3.5 tk: Qt v: N/A info: frameworks v: 6.14.0
wm: kwin_wayland tools: avail: swayidle,swaylock,xscreensaver vt: 2 dm:
1: GDM v: 48.0 2: SDDM note: stopped Distro: openSUSE Tumbleweed 20250612
Graphics:
Device-1: Advanced Micro Devices [AMD/ATI] Navi 31 [Radeon RX 7900 XT/7900
XTX/7900 GRE/7900M] vendor: XFX RX-79XMERCB9 driver: amdgpu v: kernel
arch: RDNA-3 code: Navi-3x process: TSMC n5 (5nm) built: 2022+ pcie:
gen: 4 speed: 16 GT/s lanes: 16 ports: active: DP-1 empty: DP-2, DP-3,
HDMI-A-1, Writeback-1 bus-ID: 2f:00.0 chip-ID: 1002:744c class-ID: 0300
Display: wayland server: X.org v: 1.21.1.15 with: Xwayland v: 24.1.6
compositor: kwin_wayland driver: X: loaded: amdgpu dri: radeonsi gpu:
amdgpu
display-ID: 0
Monitor-1: DP-1 model: Gigabyte M32UC serial: <filter> built: 2022
res: 3840x2160 dpi: 140 gamma: 1.2 size: 697x392mm (27.44x15.43")
diag: 800mm (31.5") ratio: 16:9 modes: max: 3840x2160 min: 720x400
API: EGL v: 1.5 hw: drv: amd radeonsi platforms: device: 0 drv: radeonsi
device: 1 drv: swrast gbm: drv: kms_swrast surfaceless: drv: radeonsi
wayland: drv: radeonsi x11: drv: radeonsi
API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 25.1.3 glx-v: 1.4
direct-render: yes renderer: AMD Radeon RX 7900 XTX (radeonsi navi31 LLVM
20.1.6 DRM 3.63 6.15.1-1-default) device-ID: 1002:744c memory: 23.44 GiB
unified: no display-ID: :0.0
API: Vulkan v: 1.4.313 layers: 8 device: 0 type: discrete-gpu name: AMD
Radeon RX 7900 XTX (RADV NAVI31) driver: N/A device-ID: 1002:744c
surfaces: N/A device: 1 type: cpu name: llvmpipe (LLVM 20.1.6 256 bits)
driver: N/A device-ID: 10005:0000 surfaces: N/A
Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
de: kscreen-console,kscreen-doctor gpu: corectrl,radeontop wl: kanshi,
swaymsg, wayland-info, wlr-randr x11: xdpyinfo, xprop, xrandr
```
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