https://bugs.kde.org/show_bug.cgi?id=510926
Bug ID: 510926
Summary: RDP sessions whitescreen when native screens on host
>= 3
Classification: Plasma
Product: KRdp
Version First 6.4.5
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
SUMMARY
RDP session shows a permanent white screen on the client when three monitors
are enabled on a Plasma 6 Wayland session. Disabling an extra monitors avoids
the issue (works with 2 or 1, doesnt matter which ones I keep enabled).
Feature request: add an option to expose only the primary display (or select
displays) to the RDP session.
STEPS TO REPRODUCE
1.Start a Wayland session on KDE Plasma.
2.Enable System Settings → Remote Desktop → RDP server (default port 3389).
3.Have three monitors enabled (I tasted with the following):
Dell Inc. DELL AW2518HF — 1920×1080
LG Electronics 23EA63 — 1920×1080
Fujitsu Siemens Computers GmbH E19W-5 — 1440×900
4.Connect from an RDP client to the machine.
OBSERVED RESULT
The RDP client connects but only displays a white screen. No desktop content
appears. input works.
EXPECTED RESULT
The remote desktop should render normally.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
Kernel Version: 6.17.4-4-cachyos (64-bit)
Graphics Platform: Wayland
GPU: AMD Radeon RX 6600 XT
CPU: AMD Ryzen 7 5800X3D
RAM: 32 GiB
Tested with various RDP clients like Remmina 1.4.41, Windows RDP client on win
11, etc.
ADDITIONAL INFORMATION
Suspect interaction between kwin’s RDP/screencast path (PipeWire) and
multi-output capture.
Suggested feature: In Remote Desktop -> RDP, add “Share only primary display”
or “Select displays to share.” This would also serve as a practical workaround
for this bug while also being a useful feature to have. I don't expect many
people to actually remote into there workstations from another workstation with
3 monitors so this doesn't really need a proper fix if we can't find the cause.
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