409226 2019-06-27 00:57:45 +0000 Default setting or option to show UI on only primary screen or user-specified screen 2026-06-24 08:03:41 +0000 1 1 4 Plasma plasmashell Screen locking 6.2.4 Neon Linux RESOLVED FIXED https://bugs.kde.org/show_bug.cgi?id=431382 https://bugs.kde.org/show_bug.cgi?id=437471 https://bugs.kde.org/show_bug.cgi?id=455380 https://bugs.kde.org/show_bug.cgi?id=446592 https://bugs.kde.org/show_bug.cgi?id=465566 https://bugs.kde.org/show_bug.cgi?id=456210 https://bugs.kde.org/show_bug.cgi?id=433563 NOR wishlist 1.0 1 madLyfe plasma-bugs-null 4wy78uwh bshah eleonefnyr grahamperrin heri+kde jp kde marco.ambu nate paul.lemmons piotr.mierzwinski postix sulmpx60 https://invent.kde.org/plasma/plasma-desktop/-/commit/305d88e050ffe4018544e6d4b7c5c6730ca5c0d4 6.4.0 0 oldest_to_newest 1865791 0 madLyfe 2019-06-27 00:57:45 +0000 SUMMARY not sure where this should go but when you have more than one screen the login fields are on all monitor screens when in a login state rather than the expected primary display. this should at least be an option. STEPS TO REPRODUCE 1. have kde 2. have multiple displays 3. witness all the logins. OBSERVED RESULT login fields on all areas where one would login to the system EXPECTED RESULT login should only be on the primary display or at least be an option SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon (available in About System) KDE Plasma Version: all version KDE Frameworks Version: all version Qt Version: all versions ADDITIONAL INFORMATION 1866127 1 kde 2019-06-28 20:25:05 +0000 What problem is that solving? 1866131 2 nate 2019-06-28 20:45:41 +0000 It's purely aesthetic. Speaking personally, this solves the "problem" of the presentation looking kind of awkward when you have more than one screen. It's nice to have the login UI only show up on the primary one (yes I know the concept of a primary screen is problematic and controversial). 1866142 3 madLyfe 2019-06-28 22:24:23 +0000 the question could be asked in reverse, too. what problem is it solving to have a login on every monitor? when i am ready to login i have no idea where im at, what screen is the active one. this applies for when you ctrl-alt-delete to get the options menu, i have no idea where im at and am naturally drawn to my primary monitor. of win 10, gnome, and kde that i use frequently with multiple monitors, kde is the only one like this. its bugged me for a while. 1941421 4 piotr.mierzwinski 2020-07-02 20:22:34 +0000 (In reply to kinghat from comment #3) > the question could be asked in reverse, too. what problem is it solving to > have a login on every monitor? > > when i am ready to login i have no idea where im at, what screen is the > active one. this applies for when you ctrl-alt-delete to get the options > menu, i have no idea where im at and am naturally drawn to my primary > monitor. > > of win 10, gnome, and kde that i use frequently with multiple monitors, kde > is the only one like this. its bugged me for a while. And having one monitor with different resolution try to turn off one of them and check what will be result. I will answer you. You will get two login screens on one, or in other words: one overlaps the other. Here is solution: https://blog.victormendonca.com/2018/06/29/how-to-fix-sddm-on-multiple-screens/. Shortly saying, it relies on turning off other monitor(s) in moment of login. 2018165 5 marco.ambu 2021-03-22 13:50:07 +0000 The other thing annoying is that I never know which screen I need to type my password to, so I select the password box on one screen and start typing but then realise that I needed to click on the password box on the other screen. 2042881 6 nate 2021-06-21 22:54:05 +0000 *** Bug 413103 has been marked as a duplicate of this bug. *** 2169007 7 nate 2022-11-04 20:13:23 +0000 This would automatically fix Bug 433563. 2410496 8 fanzhuyifan 2025-03-25 16:30:48 +0000 Git commit 305d88e050ffe4018544e6d4b7c5c6730ca5c0d4 by Yifan Zhu. Committed on 25/03/2025 at 16:03. Pushed by fanzhuyifan into branch 'master'. lockscreen: only show UI on screen with mouse Otherwise one appears on every screen, which is awkward. However, forcing it to be on a particular screen is undesirable, since if that screen is turned off but not unplugged, it may still be sending a signal to the OS and show up as a valid screen to show things on. To alleviate that concern, always show the UI on the screen with pointer. Test plan: - use multiscreen setup and lock screen - move mouse across screens, verify that only screen with pointer shows controls - type some password without pressing enter, and repeat previous point Related: bug 465566 M +4 -1 desktoppackage/contents/lockscreen/LockScreenUi.qml https://invent.kde.org/plasma/plasma-desktop/-/commit/305d88e050ffe4018544e6d4b7c5c6730ca5c0d4 2526303 9 sulmpx60 2026-06-24 08:03:41 +0000 There is a problem with the wallpaper being displayed on all monitors without being able to turn it off. Firstly, if use OLED monitors as additional monitors in a multimonitor configuration (for example, 3 monitors), then it is harmful for them to display such a static image as wallpaper for a long time, and a black screen would turn off their pixels altogether. So, I would prefer that these additional monitors not display wallpaper, but a black screen. Secondly, if several large displays are used (let's say 27 inches), then, for example, I put black wallpaper on additional monitors so that they don't blind me like floodlights. And at the same time, the kscreenlocker unfortunately turns on the wallpaper on all three monitors, which creates too much light from them, and in general just wastes energy on these monitors for no particular reason. A possible solution would be to make an option that allows to show not only the UI on that one monitor at a time with the pointer, but also to have the wallpaper with UI displayed only on that one monitor at the time. This would be in addition to `lockscreen: only show UI on screen with mouse`. This should solve the problem described, without creating new problems with identifying the "main" monitor (and those cases where the main monitor is turned off, but it sends a signal that it's working, and so on).