Hello Andreas,
Thank you for the screenshots and the side-by-side comparison. They confirm exactly what you described.
I shared your case with our RDM Linux developers, and they have confirmed the cause.
What changed in 2026.3:
- Before 2026.3, RDM Linux applied its scaling setting to the whole RDP view. This rendered the session at 100% and let your system upscale it. It was not designed as a feature, but it gave you the fast, slightly blurry mode you relied on.
- In 2026.3, RDM Linux moved to a new user interface framework. It now always renders at your screen's full resolution. On macOS this behavior is an option ("Optimize for Retina displays") that is off by default, which is why RDM macOS 2026.3 still works the way you expect. On Linux it is currently always on, with no way to turn it off.
- The developers also found a bug where your local scale factor overrides the scaling level set in the entry. That is why changing the Desktop and Device scaling levels has no effect.
So this is not a configuration problem on your side. No setting in 2026.3.0.5 can restore the old behavior.
The team agrees that RDM Linux needs an option to choose speed over sharpness again, similar to the macOS option. There is no release date for this yet.
Until then, you have two options:
1. Stay on, or go back to, RDM Linux 2026.2.2.2 if speed matters most for your work.
2. In 2026.3, set a fixed remote desktop size instead of Dynamic resolution. Scaling will not go back to 100%, but less data is transferred, so sessions should feel faster.
I will keep this case open and update you as soon as a fix or the new option is available.
Best regards,
