477177 2023-11-18 08:09:35 +0000 Strange scaling behavior with xwayland scaling settings on mixed DPI setups 2024-06-25 22:57:12 +0000 1 1 4 Plasma kwin multi-screen 5.27.80 Arch Linux Linux RESOLVED DUPLICATE 474738 https://bugs.kde.org/show_bug.cgi?id=483401 qt6 NOR major --- 0 rohan kwin-bugs-null kde nate 0 oldest_to_newest 2266752 0 rohan 2023-11-18 08:09:35 +0000 SUMMARY When on a mixed DPI setup (i.e. two 4k monitors at 195% and one 1440p ultrawide at 130%) and the xwayland "apply scaling themselves" option is set, some clients (including those not running on xwayland) render at an extremely high resolution (in this case, 5159x2184). If only one display is enabled, or all displays are using the same scaling factor, the problem goes away and windows are rendered at the native resolution of the monitor again. Some examples of non-xwayland apps being affected by this are: - Gamescope - Minecraft (using `glfw_wayland`) I've had this issue since I started using the Plasma wayland session, but I haven't gotten around to making a bug report until now. STEPS TO REPRODUCE 1. Have a mixed DPI setup 2. Set different DPI levels on two monitors 3. Open OBSERVED RESULT Games/apps rendering at an extremely high resolution EXPECTED RESULT Games/apps rendering at the native resolution of the monitor, as they do when all monitor have the same scaling factor SOFTWARE/OS VERSIONS Linux: 6.6.1 (available in About System) KDE Plasma Version: 5.27.80 KDE Frameworks Version: 5.245.0 Qt Version: 6.6.0 ADDITIONAL INFORMATION Marked severity as major as this effects gaming on all multi-dpi setups, as far as I can tell. 2268654 1 nate 2023-11-26 16:25:09 +0000 Could you attach a screenshot of the all screens that shows the issue? Possibly a variant of Bug 474738? 2270456 2 rohan 2023-12-02 00:55:14 +0000 I'm not sure how I could show the issue, since it's a problem with the resolution of the windows (they otherwise work fine). Is there a debug app that displays the resolution it's rendering at or something? 2274609 3 bug-janitor 2023-12-17 03:45:45 +0000 Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone! 2277469 4 bug-janitor 2024-01-01 03:46:07 +0000 This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone! 2305957 5 rohan 2024-03-27 03:02:37 +0000 I've done more testing and this doesn't seem to apply to wayland-native apps. Not sure if something got fixed, or if I was just testing it incorrectly before. Running minecraft with glfw-wayland will render at the native 3440x1440 resolution of my monitor while running it in xwayland will set the resolution to 5159x2184. This seems to hold true for every other game I've tested, so I'm currently running all my games in gamescope so they render at the correct resolution. 2319073 6 rohan 2024-05-12 06:06:26 +0000 Someone else on Reddit seems to also be having this issue: https://reddit.com/r/linux_gaming/comments/1cp7hgu/plasma_multimonitor_gaming_woes/ 2331828 7 nate 2024-06-25 22:56:57 +0000 *** This bug has been marked as a duplicate of bug 474738 ***