https://bugs.kde.org/show_bug.cgi?id=510001
Bug ID: 510001
Summary: Wayland session only activates 1 monitor with AMD
WX5100 (Polaris); 3 detected by amdgpu DRM
Classification: Plasma
Product: kwin
Version First unspecified
Reported In:
Platform: Debian stable
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 185320
--> https://bugs.kde.org/attachment.cgi?id=185320&action=edit
kde-wayland-bugreport
📝 Bug report listo para bugs.kde.org
Product: KWin
Component: Wayland
Version: 6.3.6
Platform: Debian 13 (Trixie) – Plasma Wayland session
Hardware: AMD Radeon Pro WX5100 (Polaris10), 3× 4K monitors (DP-1, DP-2, DP-3)
Summary
Wayland session in Plasma 6.3.6 with AMD WX5100 (Polaris) only activates 1
monitor, while amdgpu DRM reports 3 connected.
Steps to reproduce:
Start Plasma Wayland session on Debian 13 with AMD WX5100.
Connect 3 monitors via DisplayPort.
Open System Settings → Display Configuration.
Expected result:
All 3 connected monitors should be visible and configurable (as in Plasma X11
session).
Actual result:
Only 1 monitor is shown and active.
The other 2 remain black / unavailable.
In Plasma X11 session, all 3 monitors work fine.
Additional information:
Plasma: 6.3.6
KDE Frameworks: 6.13.0
Qt: 6.8.2
Mesa: 25.0.7
Kernel: 6.12.48
GPU: AMD Radeon Pro WX5100 (Polaris10)
Driver: amdgpu (radeonsi, RADV)
DRM (modetest -c) shows 3 connectors connected with valid EDID.
cat /sys/class/drm/*/status shows 3× connected.
Bug only happens on Wayland; X11 session works with 3 monitors.
Attachments:
Output of modetest -c
Output of cat /sys/class/drm/*/status
Relevant journal logs (journalctl --user -b | grep kwin)
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