§2023-09-17

If there are performance issues, it might help to add the sddm user to the video group: usermod -a -G video sddm

¶1. Configuration:

SDDM has two configuration locations: /usr/share/sddm/sddm.conf.d/ and /etc/sddm.conf.d/ which is used to override specific options. The second is not created by the package. KDE Plasma writes user changed options to /etc/sddm.conf.d/. Both locations supports files with the same format. See man 5 sddm.conf man page for details on available options.

$ qlist sddm|grep sddm.conf
/usr/lib/sysusers.d/acct-group-sddm.conf
/usr/lib/sysusers.d/acct-user-sddm.conf
/usr/share/man/man5/sddm.conf.5.bz2
/usr/share/dbus-1/system.d/org.freedesktop.sddm.conf
/usr/lib/tmpfiles.d/sddm.conf
/lib/sysusers.d/sddm.conf
/etc/sddm.conf.d/01gentoo.conf

$ qlist sddm |grep Xsetup
/usr/share/sddm/scripts/Xsetup

$ sudo find / -name Xsetup
/etc/sddm/scripts/Xsetup
/usr/share/sddm/scripts/Xsetup

$  cat /usr/share/sddm/scripts/Xsetup
#!/bin/sh
# Xsetup - run as root before the login dialog appears

$ sudo emerge --ask x11-apps/xrandr

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These are the packages that would be merged, in order:

Calculating dependencies... done!
Dependency resolution took 13.61 s.

[ebuild  N     ] x11-apps/xrandr-1.5.2 

Would you like to merge these packages? [Yes/No] Yes