Sudden blank black screen

[Marty Jack]

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.