No, that doesn't help - the screen stays blank if I set it to 1920x1080 using g-c-c and then run the set max bpc command.
I also tried setting 1920x1080i using xrandr in case that's what g-c-c was choosing but it worked fine. With the 1920x1080 setting chosen in g-c-c (and the monitor consequently getting no signal), this is what xrandr says for HDMI-1: HDMI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 597mm x 336mm 2560x1440 59.95 + 1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98* 1920x1080i 60.00 50.00 59.94 1600x1200 60.00 1280x1024 75.02 60.02 1280x960 60.00 1360x768 60.02 1280x720 60.00 50.00 59.94 1024x768 75.03 70.07 60.00 800x600 75.00 60.32 720x576 50.00 720x576i 50.00 720x480 60.00 59.94 720x480i 60.00 59.94 640x480 75.00 60.00 59.94 720x400 70.08 ie it looks like g-c-c has chosen a mode that doesn't actually exist for xrandr, because none of the modes have an asterisk next to them. Fwiw, I *think* that g-c-c did use to be able to successfully set the resolution to 1920x1080 on this monitor. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1892296 Title: gnome-control-center cannot change resolution of external monitor Status in gnome-control-center package in Ubuntu: New Status in mutter package in Ubuntu: New Bug description: g-c-c is unable to change the resolution on my external 2560x1440 monitor to 1920x1080 - when I try, the monitor turns off. However, the command "xrandr --output HDMI-1 --mode 1920x1080" does successfully change the resolution. xrandr for the monitor shows: HDMI-1 connected 2560x1440+0+0 (normal left inverted right x axis y axis) 597mm x 336mm 2560x1440 59.95*+ 1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98 1920x1080i 60.00 50.00 59.94 1600x1200 60.00 1280x1024 75.02 60.02 1280x960 60.00 1360x768 60.02 1280x720 60.00 50.00 59.94 1024x768 75.03 70.07 60.00 800x600 75.00 60.32 720x576 50.00 720x576i 50.00 720x480 60.00 59.94 720x480i 60.00 59.94 640x480 75.00 60.00 59.94 720x400 70.08 I tried changing the resolution to 1600x1200 using g-c-c and this did work. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: gnome-control-center 1:3.36.4-0ubuntu1 Uname: Linux 5.8.1-050801-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.8 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Thu Aug 20 11:28:08 2020 InstallationDate: Installed on 2019-07-01 (415 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190606) SourcePackage: gnome-control-center UpgradeStatus: Upgraded to focal on 2019-12-08 (255 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1892296/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
