Rockman8
n00b
Joined: 19 Sep 2023
Posts: 37
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 Posted: Fri Jun 07, 2024 5:16 am Post subject: Rotating SDDM with xrandr on Plasma-wayland |
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Hello,
I've been trying for some time to rotate my SDDM login screen using xrandr, I found out that following SDDM guide on gentoo wiki was not enough when launching SDDM-X11(default) on kde Plasma-wayland, xrandr output on wayland is "inaccurate", xrandr will not address properly the output monitors at SDDM-X11 launch time.
By running xrandr --listmonitors on wayland will output:
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0: +*HDMI-A-1 1920/530x1080/300+1200+420 HDMI-A-1
1: +DP-3 1200/520x1920/320+3120+0 DP-3
2: +DP-4 1200/520x1920/320+0+0 DP-4
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but running xrandr --listmonitors >& ~userName/xrandr_listmonitors along with display-manager service will result in
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0: +HDMI-A-0 1920/532x1080/304+1200+0 HDMI-A-0
1: +DisplayPort-2 1200/518x1920/324+3120+0 DisplayPort-2
2: +DisplayPort-3 1200/518x1920/324+0+0 DisplayPort-3
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First we must find out if the script (Xsetup) is being executed by checking /var/log/sddm.log
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[00:09:19.363] (II) DAEMON: Initializing...
[00:09:19.369] (II) DAEMON: Starting...
[00:09:19.369] (II) DAEMON: Logind interface found
[00:09:19.370] (II) DAEMON: Adding new display...
[00:09:19.370] (II) DAEMON: Loaded empty theme configuration
[00:09:19.370] (II) DAEMON: Xauthority path: "/run/sddm/xauth_hfypdb"
[00:09:19.370] (II) DAEMON: Using VT 7
[00:09:19.370] (II) DAEMON: Display server starting...
[00:09:19.370] (II) DAEMON: Writing cookie to "/run/sddm/xauth_hfypdb"
[00:09:19.370] (II) DAEMON: Running: /usr/bin/X -nolisten tcp -background none -seat seat0 vt7 -auth /run/sddm/xauth_hfypdb -noreset -displayfd 16
[00:09:21.796] (II) DAEMON: Setting default cursor
=================================================================
[00:09:21.805] (II) DAEMON: Running display setup script "/etc/sddm/scripts/Xsetup"
=================================================================
[00:09:22.765] (II) DAEMON: Display server started.
[00:09:22.765] (II) DAEMON: Socket server starting...
[00:09:22.765] (II) DAEMON: Socket server started.
[00:09:22.765] (II) DAEMON: Loading theme configuration from "/usr/share/sddm/themes/breeze/theme.conf"
[00:09:22.766] (II) DAEMON: Greeter starting...
[00:09:22.777] (II) HELPER: [PAM] Starting...
[00:09:22.777] (II) HELPER: [PAM] Authenticating...
[00:09:22.777] (II) HELPER: [PAM] returning.
[00:09:22.800] (II) HELPER: Writing cookie to "/tmp/xauth_WkDfQp"
[00:09:22.800] (II) HELPER: Starting X11 session: "" "/usr/bin/sddm-greeter --socket /tmp/sddm-:0-FdBbWc --theme /usr/share/sddm/themes/breeze"
[00:09:22.802] (II) DAEMON: Greeter session started successfully
[00:09:22.861] (II) DAEMON: Message received from greeter: Connect
[00:09:53.155] (II) DAEMON: Message received from greeter: Login
[00:09:53.155] (II) DAEMON: Reading from "/usr/share/wayland-sessions/plasmawayland.desktop"
[00:09:53.156] (II) DAEMON: Session "/usr/share/wayland-sessions/plasmawayland.desktop" selected, command: "/usr/lib64/libexec/plasma-dbus-run-session-if-needed /usr/bin/startplasma-wayland" for VT 8
[00:09:53.170] (II) HELPER: [PAM] Starting...
[00:09:53.170] (II) HELPER: [PAM] Authenticating...
[00:09:53.170] (II) HELPER: [PAM] Preparing to converse...
[00:09:53.170] (II) HELPER: [PAM] Conversation with 1 messages
[00:09:53.177] (II) HELPER: [PAM] returning.
[00:09:53.177] (II) DAEMON: Authentication for user "username" successful
[00:09:53.262] (II) HELPER: Starting Wayland user session: "/usr/share/sddm/scripts/wayland-session" "/usr/lib64/libexec/plasma-dbus-run-session-if-needed /usr/bin/startplasma-wayland"
[00:09:53.265] (II) HELPER: Jumping to VT 8
[00:09:53.265] (II) HELPER: VT mode didn't need to be fixed
[00:09:53.270] (II) HELPER: [PAM] Closing session
[00:09:53.272] (II) HELPER: [PAM] Ended.
[00:09:53.273] (II) DAEMON: Auth: sddm-helper exited successfully
[00:09:53.273] (II) DAEMON: Greeter stopped. SDDM::Auth::HELPER_SUCCESS
[00:09:53.424] (II) DAEMON: Session started true
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Once we have checked if the script (Xsetup) is being executed then we proceed to check the command output, if not then, we must check /etc/sddm.conf.d/override.conf
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# /etc/sddm.conf.d/override.conf
[X11]
DisplayCommand=/etc/sddm/scripts/Xsetup
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xrandr will not output to any other means other than stdout and stderr meaning it will not show up on log, and as soon display-manager is started we will not have access to TTY to check its output, to remedy this then we must bring its output to file.
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# /etc/sddm/scripts/Xsetup
#default
xrandr --output HDMI-A-1 --auto --primary >& ~userName/xrandr_std0
#portrait
xrandr --output DP-3 --right-of HDMI-A-0 --rotate right --noprimary >& ~userName/xrandr_std1
#portrait
xrandr --output DP-4 --left-of HDMI-A-0 --rotate left --noprimary >& ~userName/xrandr_std2
#list all available monitors
xrandr --listmonitors >& ~userName/xrandr_listmonitors
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Done that, then logout, just CTRL+ALT+FN (N=any other other TTY that's not being used by SDDM usually F1 is fine) to login into terminal and
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rc-service display-manager status
# if display-manager has somehow crashed, zap it, if not, then stop
rc-service display-manager stop/zap
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cat ~userName/xrandr_listmonitors
# if xrandr is executed without any errors/messages, it won't output a readable file
cat ~userName/xrandr_std0
cat ~userName/xrandr_std1
cat ~userName/xrandr_std2
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Check for misnamed monitors and some other possible errors and restart the display-manager
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rc-service display-manager start
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Check if SDDM has rotated and is positioned accondingly, then procceed to clean up the Xsetup file by deleting the "output to file" entry.
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# /etc/sddm/scripts/Xsetup
xrandr --output HDMI-A-0 --auto --primary
xrandr --output DisplayPort-2 --right-of HDMI-A-0 --rotate right --noprimary
xrandr --output DisplayPort-3 --left-of HDMI-A-0 --rotate left --noprimary
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tl;dr
Just place >% path/fileName at the end of xrandr command in Xsetup to fetch for some possible errors and list X11's monitor's name with xrandr --listmonitors and correct the Xsetup entry. |
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