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Not-MilanGurung

Member

Registered: 2025-05-21

Posts: 4

[SOLVED] Libinput touchpad config prevented sddm from loading

I encountered a problem when I created a basic touch pad configuration following the wiki in

 /etc/X11/xorg.conf.d/30-touchpad.conf 

  After I rebooted by system, it gave the error :

 Failed to read display number from pipe 

Removing the configuration file solved the issue but now I am curious on whether I did something wrong or is this some kind of bug.

Last edited by Not-MilanGurung (2025-05-24 04:32:47)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 24,802

Re: [SOLVED] Libinput touchpad config prevented sddm from loading

What were the contents of said configuration file?

Not-MilanGurung

Member

Registered: 2025-05-21

Posts: 4

Re: [SOLVED] Libinput touchpad config prevented sddm from loading

What were the contents of said configuration file?

Here is the config; copied straight from the wiki:

Section "InputClass"
    Identifier "touchpad"
    Driver "libinput"
    MatchIsTouchpad "on"
    Option "Tapping" "on"
    Option "TappingButtonMap" "lmr"
EndSection

I didn't have time to modify it further because I was in class

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 24,802

Re: [SOLVED] Libinput touchpad config prevented sddm from loading

That should™ be fine. Resulting xorg log from the SDDM failure?

Not-MilanGurung

Member

Registered: 2025-05-21

Posts: 4

Re: [SOLVED] Libinput touchpad config prevented sddm from loading

Here is the journal log (Xorg log only goes back one session and I am now 4 sessions ahead. Not sure what the difference is between them is)

May 21 19:21:52 notMilan sddm[738]: Initializing...
May 21 19:21:52 notMilan sddm[738]: Starting...
May 21 19:21:52 notMilan sddm[738]: Logind interface found
May 21 19:21:52 notMilan sddm[738]: Adding new display...
May 21 19:21:52 notMilan sddm[738]: Loaded empty theme configuration
May 21 19:21:52 notMilan sddm[738]: Xauthority path: "/run/sddm/xauth_hjzlUQ"
May 21 19:21:52 notMilan sddm[738]: Using VT 2
May 21 19:21:52 notMilan sddm[738]: Display server starting...
May 21 19:21:52 notMilan sddm[738]: Writing cookie to "/run/sddm/xauth_hjzlUQ"
May 21 19:21:52 notMilan sddm[738]: Running: /usr/bin/X -nolisten tcp -background none -seat seat0 vt2 -auth /run/sddm/xauth_hjzlUQ -noreset -displayfd 16
May 21 19:21:52 notMilan sddm[738]: Failed to read display number from pipe
May 21 19:21:52 notMilan sddm[738]: Display server stopping...
May 21 19:21:52 notMilan sddm[738]: Attempt 1 starting the Display server on vt 2 failed
May 21 19:21:54 notMilan sddm[738]: Display server starting...
May 21 19:21:54 notMilan sddm[738]: Writing cookie to "/run/sddm/xauth_hjzlUQ"
May 21 19:21:54 notMilan sddm[738]: Running: /usr/bin/X -nolisten tcp -background none -seat seat0 vt2 -auth /run/sddm/xauth_hjzlUQ -noreset -displayfd 16
May 21 19:21:54 notMilan sddm[738]: Failed to read display number from pipe
May 21 19:21:54 notMilan sddm[738]: Display server stopping...
May 21 19:21:54 notMilan sddm[738]: Attempt 2 starting the Display server on vt 2 failed
May 21 19:21:56 notMilan sddm[738]: Display server starting...
May 21 19:21:56 notMilan sddm[738]: Writing cookie to "/run/sddm/xauth_hjzlUQ"
May 21 19:21:56 notMilan sddm[738]: Running: /usr/bin/X -nolisten tcp -background none -seat seat0 vt2 -auth /run/sddm/xauth_hjzlUQ -noreset -displayfd 16
May 21 19:21:56 notMilan sddm[738]: Failed to read display number from pipe
May 21 19:21:56 notMilan sddm[738]: Display server stopping...
May 21 19:21:56 notMilan sddm[738]: Attempt 3 starting the Display server on vt 2 failed
May 21 19:21:56 notMilan sddm[738]: Could not start Display server on vt 2
May 21 19:30:29 notMilan sudo[1381]:    milan : TTY=tty2 ; PWD=/home/milan ; USER=root ; COMMAND=/usr/bin/rm /etc/X11/xorg.conf.d/30-touchpad.conf
May 21 19:32:04 notMilan sddm[738]: Signal received: SIGTERM
May 21 19:32:04 notMilan systemd[1]: sddm.service: Deactivated successfully.

Additionally, I remember installing and uninstalling libinput-gestures, and updating tuxedo-drivers-dkms for my laptop (the source changed from GitHub to Gitlab). I first tried uninstalling, and rebuilding the drivers (rebooting after each action) but it didn't solve anything (the sddm logs for all those sessions are the same as this).  Then I removed the touchpad.conf and rebooted, and sddm successfully launched.
I can try recreating the error if needed.

Last edited by Not-MilanGurung (2025-05-23 02:58:33)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 24,802

Re: [SOLVED] Libinput touchpad config prevented sddm from loading

We'd need the actual xorg log. SDDM is not going to know why the xorg server died.

Not-MilanGurung

Member

Registered: 2025-05-21

Posts: 4

Re: [SOLVED] Libinput touchpad config prevented sddm from loading

I found my mistake. I wrongfully assumed that I just copied the config from the wiki when I actually also copied something else (found using when I looked through my browser history) and there I found

 ... 
EndSection

The ...  creates the error. I kinda feel dumb for making such a simple mistake. I will in future make sure to make backups of configs instead of out right removing them, and also use logrotate for xorg logs. Anyway thanks for the help V1del.