Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: mutter (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1890141
Title:
Can't fullscreen, or windows get automatically un-fullscreened, when
using fractional scaling
Status in mutter package in Ubuntu:
Confirmed
Bug description:
Same issue as this one: https://bugs.launchpad.net/ubuntu/+source
/gnome-shell/+bug/1863391
Some websites like YouTube will attempt to fullscreen, just not
successfully. Other websites, like Netflix, will fullscreen for a
second and de-fullscreen after that. Some games act weirdly in
fullscreen mode (this might be related, as I've never had this issue
before now: https://github.com/ValveSoftware/csgo-osx-
linux/issues/2429).
EDIT: This only happens when fractional scaling is enabled. My config;
main 4K screen at 150% and secondary 1080p screen to the right at
100%. YouTube fullscreens fine on the sec. screen (1080 100%).
This is a gif I posted in the related bug report showing exactly what
happens: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1863391/+attachment/5397743/+files/20200731_160007.gif
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: mutter 3.36.3-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 3 14:03:00 2020
InstallationDate: Installed on 2020-07-30 (4 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)
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