Yes it seems Xorg changes its definition of the preferred/current
resolutions.
Before:
1920x1080 (0x190) 148.500MHz +HSync +VSync +preferred
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.00Hz
1920x1080 (0x191) 148.500MHz +HSync +VSync *current
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz
v: height 1080 start 1082 end 1087 total 1125 clock 60.00Hz
After:
1920x1080i (0x194) 74.250MHz +HSync +VSync Interlace *current
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.75KHz
v: height 1080 start 1084 end 1094 total 1125 clock 60.00Hz
1920x1080i (0x195) 74.250MHz +HSync +VSync Interlace
h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 28.12KHz
v: height 1080 start 1084 end 1094 total 1125 clock 50.00Hz
** Package changed: gnome-shell (Ubuntu) => mutter (Ubuntu)
** Package changed: mutter (Ubuntu) => xorg-server (Ubuntu)
** Summary changed:
- blurry resolution after resume on second screen
+ [modeset] blurry resolution after resume on second screen
** Changed in: xorg-server (Ubuntu)
Status: Incomplete => New
** Summary changed:
- [modeset] blurry resolution after resume on second screen
+ [modeset] blurry resolution (incorrectly detected as interlaced) after resume
on second screen
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https://bugs.launchpad.net/bugs/1918055
Title:
[modeset] blurry resolution (incorrectly detected as interlaced) after
resume on second screen [Dell U2417H]
Status in xorg-server package in Ubuntu:
New
Bug description:
I have connected a second screen to my laptop. After resume, sometimes
the resolution on this screen is blurry and the open windows don't fit
to the screen in fullscreen mode (they are bigger). Maybe a wrong
resolution.
1)
Description: Ubuntu 20.04.2 LTS
Release: 20.04
3)
I expected to happen that the resolution is correct.
4)
The resolution isn't correct and blurry.
Reconnection of the external display solves the problem.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DisplayManager: gdm3
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2019-06-12 (635 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
Package: gnome-shell 3.36.4-1ubuntu1~20.04.2
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.4.0-66.74-generic 5.4.86
RelatedPackageVersions: mutter-common 3.36.7+git20201123-0.20.04.1
Tags: focal
Uname: Linux 5.4.0-66-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo tty uucp
_MarkForUpload: True
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