Public bug reported:
Steps to reproduce:
(1) As a certain user (userX), launch xvfb using xinit (successfully) thus:
$ /usr/bin/xinit /usr/bin/xterm -- /usr/bin/Xvfb :40 -screen 0
1280x1024x24 -cc 4 -nolisten tcp
[dix] Could not init font path element
/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType, removing from list!
/usr/bin/xinit: XFree86_VT property unexpectedly has 0 items instead of 1
(2) As another user (userY), launch xvfb using xinit *unsuccessfully*:
$ /usr/bin/xinit /usr/bin/xterm -- /usr/bin/Xvfb :41 -screen 0
1280x1024x24 -cc 4 -nolisten tcp
[dix] Could not init font path element
/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType, removing from list!
[xkb] Can't rename /tmp/fileHBWEE2 to
/tmp/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm, error: Operation not
permitted
[xkb] Can't rename /tmp/fileOBPSkE to
/tmp/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm, error: Operation not
permitted
XKB: Failed to compile keymap
Keyboard initialization failed. This could be a missing or incorrect setup of
xkeyboard-config.
Fatal server error:
Failed to activate core devices.
/usr/bin/xinit: giving up
/usr/bin/xinit: unable to connect to X server: No such file or directory
/usr/bin/xinit: server error
(3) The reason is that /tmp/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm
already exists and is owned by userX, as detailed here on the same system:
$ ls -l /tmp/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm
-rw------- 1 userX groupX 11252 Oct 17 16:49
/tmp/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm
** Affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
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which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1067917
Title:
Cannot launch more than one xvfb instance as different users
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