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linuxmint / mint20-beta

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Preferences > Display > Zoom Level weird behaviour with Nvidia #156

Closed DarkOwl2 closed 4 years ago

DarkOwl2 commented 4 years ago

Ryzen5 with GT710 graphics, LM20 Cinnamon installed via Compatibility Mode + Nvidia drivers (default Nouveau drivers don't work at all with GT710).

Zoom levels other than 100% (or at least those which work) do not apply scaling equally vertical and horizontal. Horizontal is stretched more than vertical. 22

LM18.2 works fine on my hardware without any special drivers. Why can't 20 do the same?

Zoom level 100%:

91E211E4-8F84-41DF-8DA7-0D922EFCA64B

Zoom level 125%:

3686EB33-8435-43AB-82DB-F91F749521E0

Zoom level 150%:

38FDD3D9-9B76-4572-9EF5-8D3040F14DD0

Zoom level 175%:

9EC4EC01-687C-4D8E-8BD5-D4B5EB880952

Zoom level 200%:

93813490-B792-4A88-A9D8-4E6023CABB92

(Zoom levels 75% and 250% similar, only 100% works properly)

Zoom levels 220% (should that read 225%?) and 275% crash the display app:

F35D200B-EABF-4359-BF51-B28EEBCD28FA

After that, nothing works until the display app is closed and restarted.

Can't find the HI-DPI setting (present in 18.2) anywhere - would much prefer to set HI-DPI and then fine-tune with zoom level.

DarkOwl2 commented 4 years ago

Additional info:

Having scaled the background, it did not return to normal at 100% zoom (although the other desktop features did). With an enlarged background, the desktop became scrollable.

clefebvre commented 4 years ago

Hi,

This is upstream from us unfortunately and a limitation between xrandr and the GPU driver. What we'll do is make it clearer fractional scaling is ON and advertise it as an experimental feature with limitations.

DarkOwl2 commented 4 years ago

How does that solve my problem with a hi-dpi monitor? 200% is not a fractional scaling, and doesn't work properly on my hardware.

clefebvre commented 4 years ago

you're zooming 2x with a 1x ui scale... the upcoming version of cinnamon-control-center will make it clearer you're using upscaling.

DarkOwl2 commented 4 years ago

In 18.2, Preferences > General > Desktop scaling = Auto | Normal | Double. I can't find the same thing in 20, the only alternative appears to be 2x zoom.

Turning on Hi-DPI Support in the login window settings gets the right effect for the login screen, but not once logged in.

DarkOwl2 commented 4 years ago

OK, found it in Preferences > Display > Layout > Base Interface scale... but it doesn't work on my hardware. I'll raise another issue.