Sudden blank black screen

Marty Jack martyj19 at
Fri Sep 9 10:35:25 PDT 2011

On 09/09/2011 01:15 PM, Matthew Monaco wrote:
> 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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It sounds more like an issue with VT switch or DPMS.  Maybe Alex will respond with what he would like to see for additional information.  There may be a delay because almost all X developers would be at the XDS2011 meeting for the next few days.

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