Fractional scaling works on this laptop at every % except 175. Says changes cannot be applied this may be due to hardware limitations. This used to work fine with fedora 41, just recently stopped working, maybe 4 months ago. Has anyone seen this? Any way to force it to accept 175%? Doesnt work on gnome, works on kde.
I don’t have a direct solution for your issue, but to provide some additional context:
Gnome internally works with integer sizes, so 100%, 200% etc. To facilitate fractional scaling, it can resize the desktop in memory to an integer value, before scaling it back to 100%. So for instance setting the scale to 150% causes the desktop to be rendered at 300% in memory, and is then scaled back to 100%. This causes a slight memory and performance hit, and since it’s a lossy process it can theoretically cause some blurring.
A size of 175% is more difficult to scale to an integer value so in that case the desktop needs to be rendered internally at 4 * 175 = 700%. This is really large, i don’t know if that is one of the factors where hardware limitations could play a role.
In terms of image quality, memory usage and drawing performance however, it would be best to use 200% where possible instead of 175%.
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Its odd, 175% works on fedora when installed, but not after updates. Its also only gnome that has the issue, KDE works at 175%. Going to go to 200 and lower the font scaling.
Thank you