#776516 xorg-: Can't switch new user session

Package:
xserver-xorg-core
Source:
xorg-server
Description:
Xorg X server - core server
Submitter:
Pablo
Date:
2015-01-28 21:51:06 UTC
Severity:
normal
#776516#5
Date:
2015-01-28 21:45:55 UTC
From:
To:
Dear Maintainer,

I'm using KDE in a Debian Jessie installation. If I try to start a new user
session (with switch user option in menu) I get the login screen but when I
start the new session, the screen returns to the first user session, with the
screen locked for enter user password.

The first error in file /var/log/Xorg.1.log is:

(EE) /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied