Hi. Martin Steigerwald - 23.10.25, 12:11:31 CEST: > I tried to enable HDR for my external screen and calibrate brightness. A > screen appeared asking me to adjust a slider until the logo would only > be barely visible. I did not see a logo. But on any move of the mouse > pointer the screen should flash to black and then back to this slider > adjustment display in a way that I could actually not do the adjustment > and had to close the calibration full screen window from context menu > of of window list on system tray.
So there is something odd with full screen mode at least in some scenarios. But this time I am trying to push through. What I found with calibrating HDR is exactly the symptoms I found with various games in full screen mode. The screen would flash to black on moving mouse or trying to interact with the full screen displayed application. It would flicker between displaying stuff as usual and flickering to black. Also unfortunately the same applies to full screen video playback with Haruna, VLC and other media playing applications. Which would be kind of a show stopper. This is on an ThinkPad T14 AMD Gen 5 with AMD Ryzen 7 PRO 8840U with Radeon 780M Graphics on external 24 inch display running at 144 Hz as well as 60 Hz. Sometimes the external monitor would display that the frequency is out of range for a brief moment. To cut a longer story short: After I found it did not happen on the laptop display I found that the oddness was related to the "Adaptive sync" setting being on "automatic". I disabled adaptive sync completely. It is still set to automatic on the laptop display but my external monitor does not seem to like it while it claims to support some proprietary adaptive vsync technology as far as I am aware. So I run it with a fixed vsync frequency just like in X11. Also I was able to confirm that Nextcloud Talk in Firefox works just fine with Wayland meanwhile it seems. Including sharing screens or windows. Firefox relays to the operating system for selecting the screen or window in question. Also it appears that I can at least record a screen with OBS Studio. I do not know whether I can also record just a window in OBS Studio cause I did not find a suitable replacement for the Window (Xcomposite) input. So far things look quite good. Fingers crossed. Best, -- Martin - please no carbon copy to me
