screen goes black after logout when using xauth [solved]

[DaggyStyle]

Hello,

I have the following scenario:

• a framework that runs a gui program.
  
• group a that all the included users can use that framework
  

in an essence, user x from group a can execute program a1. program a1 uses sudo to run another program as user a_x which runs a gui program.
as the executing user isn't user a_x, I need to use xauth to extract the session's xcookie to be able to connect to the X session, after the program is done, I remove the X session from the xcookie using xauth.

this works well when I start the program but when I shut it down and logout, the screen stays black.

this started when I replaced the previous card (ati, worked without problems) with the intel igp.

any ideas? the logs doesn't show any error.
_________________
Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein

[DaggyStyle]

forgot to add some outputs:

[DaggyStyle]

not sure what happened but after a few update cycles the issue is gone.
_________________
Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein