446617 2021-12-07 12:09:47 +0000 External monitor always goes to automatic rgb range. 2021-12-08 12:03:34 +0000 1 1 4 Plasma KScreen common 5.23.4 Arch Linux Linux RESOLVED DUPLICATE 442520 NOR normal --- 0 lunar.arun kscreen-bugs-null nate xaver.hugl 5.24 0 oldest_to_newest 2083504 0 lunar.arun 2021-12-07 12:09:47 +0000 SUMMARY Colors are always washed out on reboot. I have to set RGB range to full on every login. STEPS TO REPRODUCE 1. Install and use GDM instead of SDDM. GDM already runs on full range color. I have added `ExecStartPre=/usr/bin/proptest -M i915 -D /dev/dri/card0 103 connector 98 1` on gdm system service. 2. Login to plasma session. OBSERVED RESULT The preference full range should stick on every reboot. It goes to automatic range which is not correct resulting in washed out colors. SOFTWARE/OS VERSIONS: KDE Plasma Version: 5.23.4 2083575 1 lunar.arun 2021-12-07 17:17:04 +0000 update: It happens when using on SDDM too. it's not specific to gdm. 2083674 2 nate 2021-12-07 21:22:42 +0000 Thankfully this should be fixed in Plasma 5.24 where there is official support for this in KScreen. 2083694 3 xaver.hugl 2021-12-07 22:02:17 +0000 Support has been added in 5.23, this is a dup of 442520 (/of the latest issue reported in that bug report). I'll try to reproduce it again... *** This bug has been marked as a duplicate of bug 442520 *** 2083737 4 lunar.arun 2021-12-08 02:44:29 +0000 The bug https://bugs.kde.org/show_bug.cgi?id=442520 description mentions it fails apply full rgb range. For me it applies rgb range but it doesn't work on re-login. 2083840 5 xaver.hugl 2021-12-08 12:03:34 +0000 Read the newer comments, it's the same issue. Applying works, but it resets on logout/login somehow.