HiDPI settings reset on logout

[Jeffrey Bouter]

When logging in to my XPS 13 (9360) on 17.10, the only thing that is reasonably (200%) scaled is the sidebar. Top bar, windows, and fonts are all unscaled and TINY.

- I'll go to Control Centre, Devices, Displays, and see that scaling is set to 200%.
- I'll then change the scaling to 100%, and hit apply and confirm. At this point, windows are scaled to 200%.
- I need to change the scaling to 100% AGAIN. Now everything is 100%, and therefore tiny
- I then change the scaling to 200%, hit apply and confirm, which does barely anything
- I then need to set scaling to 200% AGAIN, hit apply and confirm, and only *then* everything is properly scaled.

I need to do this every time I log back in.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-control-center 1:3.25.92.1-0ubuntu2
ProcVersionSignature: Ubuntu 4.12.0-13.14-generic 4.12.10
Uname: Linux 4.12.0-13-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Sep 14 16:33:30 2017
ExecutablePath: /usr/bin/gnome-control-center
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[hamid (alias-neo-one)]

Also affected with this issue on my Ryzen install of Arty nightly

Running kernel 4.13.0-041300-generic

Tried updating to gnome-control-center from arty-proposed as per recommendation on #ubuntu+1 (gnome-control-center/artful-proposed,now 1:3.26.0-0ubuntu1 amd64) and issue persists.

[Jeffrey Bouter (jbouter)]

Fixed in gnome 3.26 for me.

[hamid (alias-neo-one)]

I switched to Wayland by enabling modesetting (for KMS) in nvidia drivers and the scale persists after a reboot when using Wayland instead of Xorg.

See this bug for how to enable: https://bugs.launchpad.net/gdm/+bug/1697882

[Lucas Czekaj (lucas-us)]

Running Ubuntu Budgie 17.10 Beta 1 with Gnome 3.26 and the issue is still there.

[Matt Welsh (a.moocs)]

Also running 17.10 Beta 1 with Gnome 3.26. The bug is still present. I'm using external 4k Dell monitor with Nvidia card.

[Jeremy Bícha (jbicha)]

I'm reassigning this to mutter since some or all of this issue if fixed in the mutter git snapshot I am preparing now.

[Launchpad Janitor (janitor)]

This bug was fixed in the package mutter - 3.26.0+20170925~ea214fb-1

---------------
mutter (3.26.0+20170925~ea214fb-1) experimental; urgency=medium

  * New upstream git snapshot (LP: #1717272)

 -- Jeremy Bicha <email address hidden> Mon, 25 Sep 2017 18:26:10 -0400

[Jelle De Loecker (skerit)]

Even though a fix was released in september I started having this problem a few weeks ago, so since December.

[Kostiantyn Rybnikov (k-bx)]

Fresh Ubuntu 17.10 has the issue of showing Qt apps non-scaled. Should we reopen this issue or continue in https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1713323 , or make a new one? What's the way to go?