Sudden blank black screen

Matthew Monaco dgbaley27 at
Fri Sep 9 10:15:14 PDT 2011

On 09/09/2011 12:46 AM, DarkKnight BrightWarrior wrote:
> Hello all,
> I am using kernel 2.6.38 with X Server 1.9.4 with radeon open source driver.
> I am facing a strange issue. I am using DVI Monitor. Sometimes while doing
> logout and login the display is lost. Monitor shows a blank black screen and
> monitor power led blinks on and off continuously.
> And after sometime, on the top left corner of monitor I can see message
> "digital" and "analog" alternately displayed.
> Any clicks and keyboard shortcuts are not bringing the display back. I can able
> to ssh to the system. I checked ps command output and xorg log but I could not
> find any differences from a normal logged in system. From ssh session I can see
> Xorg and all other process running fine. But srangely, from ssh session If I run
>   chvt 2 and chvt 7 the display comes back. I mean switch to other terminal and
> coming back to graphics terminal makes the display on. What could be the reason
> for this?
> Thanks
> Praveen

It sounds more like an issue with your display manager. GDM?

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