Help with krdc and sound

Ask Fedora
,
1

SUMMARY

STEPS TO REPRODUCE

  1. Open RDP session to Windows 11 box. On the Host Configuration screen, General Tab, select Sound: On This Computer. Instantiate the connection and get a window of the desktop of the remote Windows 11 box.
  2. Run any app that produces sound on remote Windows 11 box. (Same result with firefox, music player, or chrome on Windows 11 box.)

OBSERVED RESULT
No sound plays on host Fedora machine.
On the remote Windows Settings: Sound page, it shows the Windows box is sending sound to Remote Audio.

EXPECTED RESULT
Sound to play on host Fedora machine.

SOFTWARE/OS VERSIONS
OS: Fedora Linux 43 (KDE Plasma Desktop Edition) x86_64
Host: 21HM002EUS (ThinkPad X1 Carbon Gen 11)
Kernel: Linux 6.17.8-300.fc43.x86_64
DE: KDE Plasma 6.5.3
WM: KWin (Wayland)
plasmashell 6.5.3
Qt: 5.15.18
KDE Frameworks: 5.116.0
kf5-config: 1.0

ADDITIONAL INFORMATION
This is new with recent update to Fedora 43, Plasma 6.5.3, and/or KRDC 25.08.3. Before update from Fedora 42, and older Plasma version, sound played locally as expected.

Note: I can still play sound from remote Windows 11 machine on host fedora machine when I connect using Thincast 1.1.658 stable, so feel that the Windows 11

2

I had some help from the kde bug tracking, and Fabio there believes there is something in Fedora.
"Well I think we have some hints on your log file:

[rdpsnd_load_device_plugin]: [dynamic] Loaded fake backend for rdpsnd

The fake backend is not going go emit any sound."

3

You are on kernel 6.17.8. The current kernel is 6.17.10.

Something may be fixed with a full software update and reboot. sudo dnf upgrade --refresh.
A lot of packages have been updated in the time for 2 new kernel releases.

In any case, most of us update regularly and by doing so we are not chasing issues that have already been addressed.

4

Thanks Jeff for the help. After a reboot, I find the same issue the newest kernel and software.
OS: Fedora Linux 43 (KDE Plasma Desktop Edition) x86_64
Kernel: Linux 6.17.10-300.fc43.x86_64
DE: KDE Plasma 6.5.3
WM: KWin (Wayland)
plasmashell 6.5.3
Qt: 5.15.18
KDE Frameworks: 5.116.0
kf5-config: 1.0