SUMMARY RDP client video seems to hav lost horizontal sync. All I see is the expected destop as slanted lines. I see this with Remmina as well so it may not be a bug in the client. The target is Fedora 43 KDE live, but I've seen the same when attemp[ting to connect to Almulinux KED images. I configured the remote target for RDP connsctons via that KDE system settings remote desktop dialog. STEPS TO REPRODUCE 1. Run krdc and enter info to connect to remote machine (VM) OBSERVED RESULT When connected the expected desktop displays as slightly angeled colored lines. It is exactly as an old CRT TV would appear if it lost horizontal sync. EXPECTED RESULT I expect to see that desktop of the remote machine's logged in user. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora 43 KDE Plasma Version: 6.5.4 KDE Frameworks Version: 6.21.0 Qt Version: 6.10.1 Graphics platform: Wayland ADDITIONAL INFORMATION The above is the same for the target remote machine.
I did some additional investigation and it occured to me it might be the RDP server's video resolution. I had been connecting to the VM via virt-manager while setting up the VM. I had changed the window size, which changed the desktop size. The display ended up with a non standard H to V ratio pixel resolution. So I tried setting the screen resoluton via the systems settings display dialog by selecting a couple of different resolutions from the dropdown. Unless I selected a resolution with "weird" ration, they all worked from the RDP client. So this appears to be an issue with how RDP handels non-standard target screen resolutions.
This should probably be reported to the upstream freerdp library: https://github.com/FreeRDP/FreeRDP I guess they will need some more info about the server and specific resolutions being used, tho.
Reported to freeRdp on gitHub: https://github.com/FreeRDP/FreeRDP/issues/12097