Public bug reported:
== Summary ==
GNOME Remote Desktop shows a black screen when connecting via RDP while the
session is actually receiving input (cursor moves on the physical monitor).
== Environment ==
- Ubuntu 26.04 (Resolute Raccoon) development branch
- gnome-remote-desktop 50.0-0ubuntu1
- PipeWire 1.6.0-1ubuntu2
- mutter 50~beta-2ubuntu4
- NVIDIA GeForce RTX 2070 Super, driver 580.126.20
- GNOME session on Wayland
== Error ==
PipeWire fails to allocate DMA-BUF buffers for the screen cast stream:
PipeWire stream error: error alloc buffers: Invalid argument
PipeWire core error: id:3 error alloc buffers: Invalid argument
The physical display uses NVIDIA block-linear DRM modifier
0x300000000606014. PipeWire cannot allocate DMA-BUF buffers with this
NVIDIA tiled modifier for the screen cast consumer (gnome-remote-
desktop).
== Additional details ==
- Setting MUTTER_DEBUG_FORCE_SHADOW_FB=1 on gnome-shell did NOT fix the issue
- RDP connection itself works (authentication, clipboard, input) - only screen
capture fails
- The issue started after a reboot on 2026-03-20, previously worked fine with
same packages
== Workaround ==
None found. Ubuntu 26.04 only ships Wayland GNOME sessions.
== Steps to reproduce ==
1. Have NVIDIA GPU with proprietary driver on Ubuntu 26.04 with GNOME Wayland
2. Enable GNOME Remote Desktop (System Settings > Remote Desktop)
3. Connect via any RDP client
4. Result: black screen, cursor movement visible on physical monitor but no
image in RDP client
** Affects: gnome-remote-desktop (Ubuntu)
Importance: Undecided
Status: Invalid
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https://bugs.launchpad.net/bugs/2145124
Title:
gnome-remote-desktop: Black screen on RDP connection with NVIDIA GPU
(PipeWire DMA-BUF buffer allocation fails)
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