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I have an Arch Linux system, stock kernel and drivers. For some strange reason, xinit produces an error when it is started by a non-root user. The logs say this:

(EE) parse_vt_settings: Cannot open /dev/tty0 (No such file or directory)

However, I can stat and ls the file from the non-root user and the permission on it are 755

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Possibly relevant: bugzilla.redhat.com/show_bug.cgi?id=1203780 Is your xorg the latest version? Are you using a wrapper? – Tom Hunt Dec 1 '15 at 0:10
    
Umm, on my arch-linux the permissions on /dev/tty0 are 620, and owner is root and group id is tty. Try setting the write permission for group and see if that helps. – ojs Dec 2 '15 at 0:21
up vote 4 down vote

Edit /etc/X11/Xwrapper.config as follow :

allowed_users=anybody
needs_root_rights=yes

Source

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s/Edit/Create. ⁺¹. – Hi-Angel Oct 27 '16 at 14:59
    
Just helped me on a raw Ubuntu 16.04 Server+X install, thanks. – Oli Jun 27 '17 at 14:23

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