You have been subscribed to a public bug:
When rebooting with USB-C external monitor (3440x1440) attached, display
orientation in "gnome-control-center display" resets requiring one to
reposition the windows on boot. Very annoying.
In addition, refresh rate drop down for external display sometimes goes
missing when setting refresh rate to 100hz instead of default 60?Hz.
Refresh rate listing and dropdown box disappears until setting monitor
resolution to different resolution and back or reboot.
ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: gnome-control-center 1:3.38.5-1ubuntu1
ProcVersionSignature: Ubuntu 5.11.0-13.14-generic 5.11.7
Uname: Linux 5.11.0-13-generic x86_64
ApportVersion: 2.20.11-0ubuntu61
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 5 01:09:38 2021
InstallationDate: Installed on 2021-04-05 (0 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Beta amd64 (20210331.1)
ProcEnviron:
LANGUAGE=en_CA:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_CA.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: amd64 apport-bug hirsute multimonitor wayland-session
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99.98Hz display mode is sometimes missing on USB-C (DisplayPort) external
monitor, which resets the display layout
https://bugs.launchpad.net/bugs/1922540
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