My main monitor has a UHD resolution. My second monitor only has a 1080p resolution. When I start a full-screen application on my main monitor, both screens sometimes go black and then show an image again, and the content jumps wildly from one screen to the other. On the 1080p monitor you can only see a section of an application and 3/4 of the monitor is just black. Sometimes everything constantly jumps back and forth and unfortunately the system is sometimes no longer usable. It looks like the entire user interface of Zorin OS is destroying itself.
I have fractional scaling turned on. Because I have set a 150% zoom factor on my UHD monitor. 200% is way too big and 100% is way too small. The 1080p monitor should not be scaled, otherwise everything there is huge.
If I turn off fractional scaling this doesn't seem to happen.
My GPU: Nvidia Geforce RTX 3060 Ti
CPU: AMD Ryzen 9 3900X
RAM: 64GB DDR4 RAM Corsair
Is there any way to fix the problem? I've never had a problem like this in Windows and I set it up exactly that way.
It seems i finally fixed the issue. I installed this gnome extension and enabled it on firefox in gnome extensions:
Please add this solution to Zorin 17 per default or as option in settings gui. This would be awesome. Seems there are no more fullscreen issues even with fractional scaling enabled on 4K and 1080p multi monitor setup.
This Guy has the exact same multi monitor setup as mine and he has uploaded a gif which is showing the problems. These are exact as mine:
Wow, great find. I was still looking into possible solutions and lamenting that Fractional Scaling is such a beast.
Thanks for finding and posting the means of resolving this.
I'm not sure what disadvantages this extension has because it disables something. I haven't noticed anything yet. But it would be interesting to know what exactly this function does that is disabled there.
You can check which (X11 or Wayland) you are logged in on with the terminal command
echo $XDG_SESSION_TYPE
Selection of the Display Protocol would be done when you reach the Login Screen and log in to your desktop. There should be a gear icon to click on. If you do not see the gear icon, select as though you want to log in on another user - this should make it appear. Once you finish making your selection, you can log in as normal.
full-screen surface unredirection to bypass compositing when running full-screen games and the like has just been merged into Mutter! Basically avoiding extra compositor work when an application/game is occupying the entire area of the desktop. This full-screen surface unredirection to bypass compositing with Mutter should be a measurable performance help for gamers
You can ignore the articles references to Wayland since you are not on Wayland and the unredirect was already supported in X11 at the time of writing.
