Need help dealing with the recent xorg bug scaling up all Qt apps

[luffysama]

So there was this stupid update pushed very recently which is creating scaling issues for everyone.

I have tried what people on internet suggested like editing the /etc/sddm.conf and setting dpi as 96 (in my case 120 looks better), but this only fixed the sddm login screen for me.

All the KDE apps ie Qt apps are still being scaled large and it's creating Huge icons and text, and in many cases blurry thumbnails and previews. GTK apps like chromium, gimp are being scaled properly.

Look at this for example : https://imgur.com/a/ghH8D2g

It's present in Dolphin, Gwenview, RSIBreak, flameshot and pretty much all Qt apps.

Now, honestly I kind of like the slightly bigger text this bug has introduced since I have a small laptop screen. But the image previews being so low resolution is annoying.

For instance, RSIBreak displays fullscreen images after the patience timer runs out. These images I have selected are 1080p and 1440p images which used to look clear before, now look like some 360p or 480p images stretched to entire display.

I tried the command xrandr --dpi 120 and relogged, didn't have any effect too.

So yeah, the editing of sddm.conf and forcing font dpi in system settings hasn't solved the problem for me. Could you guys please provide additional help?

Background : I have a 14 inch 1080p display and 125% global scaling.

╰─λ inxi -Faz
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date: 12/30/2020
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[elloquin]

When is the last time you updated this was patched yesterday (xorg)

[zoner]

yes, it was

[luffysama]

I got the update today. Doesn't seem to fix the issue though.
Do the thumbnails and previews get cached or something?

[tbg]

Yes they do.

[luffysama]

I think previously I had a different scaling for general desktop and Qt apps somehow. On that Qt apps looked slightly smaller than everything else but at least the images and svg rendered properly. Is there a way to get that back?

Like 125% scaling on desktop, but 100% scaling on Qt apps.

[luffysama]

UPDATE: I had to reinstall Garuda Linux. It's some DPI issue at 125% scaling. After re-installing Garuda it was still present, but went away as soon as I removed garuda configs for nvidia and optimus. The blur effect on Qt apps also come back.

Removing them is part of my setup since I require packages called asusctl and supergfxctl for my particular laptop in order to properly handle power and fan management and graphics switching. Optimus manager which is installed by default (and is a dependency of garuda-optimus-config) has to be fully removed so it doesn't conflict with supergfxctl.

Some input from Garuda Team would be great. @tbg @dr460nf1r3

[tbg]

I'm not a dev, but I'll respond. It's unfortunate that you had to change the default Garuda setup because of conflicts. Unfortunately, I don't think there's too much the team can do about that. However, they could take a look at it (time permitting).

If your issue was widespread I'm sure something would have to be done. At this point however, your's seems like more of an edge case. You'd really need to chat with the devs to discuss your case to see if there's a better workaround for you.

Perhaps TLP or some other power management utility could be used instead of the 2 utilities you are currently using. I know nothing about either of those apps, so I really couldn't say.

It's out of my hands, so you'll have to wait for a better response from someone on the development end of things. Hopefully something can be done, but in the mean time I'd test out alternate software to replace the problematic utilities from the AUR. Try doing some in depth searching to see if others have had problems, and if there were any workarounds found.

Good luck.

[cxor]

I'm getting this too. I found this old bug on KDE's bugtracker.

I set my scaling to 1.25 and, for now, this clears up the problems for me.

https://bugs.kde.org/show_bug.cgi?id=410632

[luffysama]

Since this is a KDE bug rather than garuda configuration, I’d consider this solution.

I set my scaling to 1.25 and, for now, this clears up the problems for me.

By this you mean in ~/.config/kdeglobals right?