Public bug reported: [Impact]
* Users of Lubuntu, Kubuntu, and Ubuntu Studio with multi-monitor setups that have variations in resolutions have issues where SDDM X screens can appear inset in other monitors and not appear on other monitors. This creates an unprofessional and broken look, and often causes usability issues (see attached). Unfortunately, this is a known bug in that SDDM doesn't exactly support multiple monitors. https://github.com/sddm/sddm/issues/1399 * This is fixed by using adding code to the already existing /usr/share/sddm/scritpts/Xsetup script, simply using xrandr to arrange the displays. * This fix comes courtesy the Kubuntu Focus project. [Test Case} * On a multi-monitor system with mis-matching native resolutions, install Lubuntu, Kubuntu, or Ubuntu Studio. * Notice issues with the login screen similar to the attached picture. [Where Problems Could Occur] * This fix has been heavily tested for over six months. However, it is possible for the script to crash or otherwise malfunction. Therefore, we do concede that it might not work at all. Human error might also be involved and cause malfunctions such as other forms of screen glitching. * Other issues which are known to occur are that screens may not appear in order in which they are presented on the user's physical order of screens. For instance, the leftmost physical screen might become the rightmost logical screen. This is because the hardware initialized that particular screen last. Unfortunately, this is normal behavior and a limitation of SDDM since it does not actually support multiple monitors. However inconvenient, this does not hinder normal behavior of the login screen. We believe this is better behavior than a logical screen covering another logical screen. [Other Info] * As stated above, this has been in extensive use and used among Kubuntu Focus users for over 6 months with great success. ** Affects: sddm (Ubuntu) Importance: High Assignee: Erich Eickmeyer (eeickmeyer) Status: New ** Affects: sddm (Ubuntu Jammy) Importance: High Assignee: Erich Eickmeyer (eeickmeyer) Status: New ** Affects: sddm (Ubuntu Kinetic) Importance: High Assignee: Erich Eickmeyer (eeickmeyer) Status: New ** Affects: sddm (Ubuntu Lunar) Importance: High Assignee: Erich Eickmeyer (eeickmeyer) Status: New ** Tags: jammy kinetic kubuntu lubuntu lunar ubuntustudio ** Attachment added: "kubuntu-focus-4k-external-display-weird-monitors.jpg" https://bugs.launchpad.net/bugs/1998254/+attachment/5633227/+files/kubuntu-focus-4k-external-display-weird-monitors.jpg ** Also affects: sddm (Ubuntu Lunar) Importance: High Assignee: Erich Eickmeyer (eeickmeyer) Status: New ** Also affects: sddm (Ubuntu Kinetic) Importance: Undecided Status: New ** Also affects: sddm (Ubuntu Jammy) Importance: Undecided Status: New ** Changed in: sddm (Ubuntu Jammy) Importance: Undecided => High ** Changed in: sddm (Ubuntu Kinetic) Importance: Undecided => Critical ** Changed in: sddm (Ubuntu Kinetic) Importance: Critical => High ** Changed in: sddm (Ubuntu Kinetic) Assignee: (unassigned) => Erich Eickmeyer (eeickmeyer) ** Changed in: sddm (Ubuntu Jammy) Assignee: (unassigned) => Erich Eickmeyer (eeickmeyer) ** Tags added: jammy kinetic kubuntu lubuntu lunar ubuntustudio -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to sddm in Ubuntu. https://bugs.launchpad.net/bugs/1998254 Title: [SRU] sddm with multiple monitors can result in screen overlays and insets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sddm/+bug/1998254/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
