Hi having the same issue since upgrading from 16.04 to 18.04. My LG 34" (Model 34UM68-P) is only detecting 1920x1080@16:9 where is should be 2560x1080@21:9. xrandr attached
** Attachment added: "xrandr.txt" https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1792167/+attachment/5202048/+files/xrandr.txt -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to qtbase-opensource-src in Ubuntu. https://bugs.launchpad.net/bugs/1792167 Title: Display size detected incorrectly Status in mutter package in Ubuntu: Incomplete Status in qtbase-opensource-src package in Ubuntu: Incomplete Bug description: My external monitor is detected as 7" although it is 32". All applications which use Qt auto scaling have huge controls! It seems like many users have the same problem (https://ubuntuforums.org/showthread.php?t=2390362) and thus disable Qt auto scaling. I think the solution should be to fix the size detection instead. It seems not related to the display server, compositor or window manager since the problem appeared in Ubuntu 17.04 (Mir, Unity) as well es 18.04 (Mutter, Gnome). I tried it with both Wayland and X (on Wayland). Further, it seems not related to graphics driver, since I personally use the open source driver with my internal Intel card, whereas someone else uses a proprietary Nvidia driver (https://askubuntu.com/q/1066879/206608). If it is in the wrong category, please move it / add the corresponding packages. If you need any further information to tackle the problem, just tell me! --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.3 Architecture: amd64 CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2017-09-05 (372 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) Package: qtbase-opensource-src PackageArchitecture: amd64 Tags: bionic Uname: Linux 4.18.7-041807-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom davfs2 dip docker lpadmin plugdev sambashare sudo vboxusers video voice _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1792167/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
