https://bugs.kde.org/show_bug.cgi?id=523924
--- Comment #2 from [email protected] --- (In reply to Aros from comment #1) > (In reply to bxschmidt from comment #0) > > Created attachment 194905 [details] > > Screenshot of distorted login screen > > > > DESCRIPTION > > I get a distorted and flickering login screen on my primary monitor when I > > connect my Philips TV (See attachment). The monitors/TV from left to right > > as shown in the settings are > > > > * Philips Consumer Electronics Company Philips FTV (3840x2160) > > * ASUSTek COMPUTER INC PG27AQDM (2560x1440) > > * Eizo Nanao Corporation EV2455 (1920x1200) > > > > The primary monitor is the second one (ASUSTek). The included screenshot is > > from this monitor. Adding the Phillips TV caused the issue. > > > > STEPS TO REPRODUCE > > 1. Physically disconnect the TV > > 2. Remove /var/lib/plasmalogin > > 3. Restart > > 4. Connect the TV > > > > OBSERVED RESULT > > The login screen on the primary monitor is distorted and flickering (See > > attachment). > > > > EXPECTED RESULT > > No distorted and flickering login screen. > > > > SOFTWARE/OS VERSIONS > > Operating System: CachyOS Linux > > KDE Plasma Version: 6.7.3 > > KDE Frameworks Version: 6.28.0 > > Qt Version: 6.11.1 > > > > ADDITIONAL INFORMATION > > Hi, Look I got your issue and can tell steps to fix this. (I have joined KDE > very recently, so I'm not exactly absolute perfect in knowing every possible > detail okay.. but here's the solution I found) : > > Your Issue is ... Well that's a complex screen setup and Wayland will have > some issues with it for sure than a single monitor, So your problem is > coming from a mismatched multi monitor state ... When the cache > (plasmalogin) is removed while your TV is physically disconnected. You see > when you remove the cache from /var what happens is when your computer boots > next time it rebuilds it but with a catch, that catch is that when the cache > is rebuilds and optimized only for the remaining displays if you now plug > your TV subsequently while the cache is not optimized for it ... SDDM / > Plasma .. mismatches the screen geometry, refresh rate limits, broked the > layout boundaries and Wayland becomes a distorted, flickering loop. > > To Fix this: Power off everything... > > Connect everything (TV, primary 1440 Monitor, third monitor) > > Enter the desktop again > > Open Terminal Emulator > > Now clear the cache : sudo rm -rf /var/lib/plasmalogin > > Now open system settings... Go to Login screen (SDDM) from the left menu and > open it > > Click Apply Plasma settings.... This will force layout cache to build > properly for your displays > > Now go back to terminal and type sudo reboot and your computer will restart > to make a clean layout cache and initialize it > > Or just reboot from the GUI and hit reboot now > > NOTE: This exact issue was also present in CachyOS Forums. Thanks. I know that it can be fixed temporarily this way. However, this is just a workaround. I am asking for a proper fix. -- You are receiving this mail because: You are watching all bug changes.
