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KB-7041: Can not login through Ubuntu / Debian GUI after installing DirectControl 5.3.1

30 June,16 at 11:32 PM

Applies to: 

Centrify Suite 2016.1 (DirectControl 5.3.1) on supported Ubuntu and Debian platforms


After installing DirectControl 5.3.1 on a Ubuntu machine and restarting it, the following error is displayed. 
The system is running in low-graphics mode
Your screen, graphics cards, and input device settings could not be detected correctly. You will need to configure these yourself.
In addition, the /etc/lightdm/lightdm.conf file contains the following line: 

As a result, users are unable to login through GUI. Console and SSH logins are not affected. 


This is caused by the generated lightdm.conf file which contains an invalid configuration parameter. 


Replace the incorrect configuration parameter with the following: 

A command similar to the following can also be deployed after installing DirectControl agent to workaround this issue: 
sed -i 's/\\n/\n/g' /etc//lightdm/lightdm.conf