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Old 03-19-2015, 02:57 PM   #1
linuxbird
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Hunting down who a monitor (or sometimes two) goes blank


I am running Slackware 14 with three screens, using KDE.

The issue I have is that all three display ports seem properly configured, and have worked for a couple of years, and all of the sudden the last several days, mid-day, something happens and one or more screens go blank.

Looking at messages and syslog, I don't see anything unusual. Can someone point me in the right direction towards figuring this out?
 
Old 03-20-2015, 04:35 AM   #2
dijetlo
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egrep -i "fail|warning|error" /var/log/Xorg.0.log
 
Old 03-20-2015, 03:31 PM   #3
linuxbird
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Quote:
Originally Posted by dijetlo View Post
egrep -i "fail|warning|error" /var/log/Xorg.0.log
Done. Nothing.


Happened a couple of hours ago again, and this time I caught a KDE daemon message. Things restored to proper operation.
 
Old 03-20-2015, 09:03 PM   #4
linuxbird
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It happened again. This time it came back. There was something flagged for audio. I am wondering if there is a display card or MB problem.

No relevant log messages.
 
Old 03-21-2015, 12:20 AM   #5
dijetlo
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Let's do this the easy way, next time it happens as soon as it comes back, open ksystemlog (just type it as one word). One of the really nice features of KDE is their log viewer
You have a choice of 5 logs to choose from
System
Kernel
Auth
Daemon
Xorg
I'd start with Xorg log, scroll to the bottom and see what it says, it doesn't have a time stamp associated but the rest of them probably will. Check the time stamp on the entry, does that match up with the event? The logs are chronological so if you note the system time upon occurrence you can go back and find the event in the log.
 
Old 03-21-2015, 09:27 PM   #6
linuxbird
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I was just tailing the logfiles. But the opportunity to learn a new tool presents it self.

Three occurrences I saw today. I had other things that were pressing so I did not investigate, but the logfiles I was tailing showed nothing of note.

If I disappear for a couple of days, it doesn't mean anything. I have relatives in the hospital, and another one going in for surgery. It just kinda all piles up at one time, and my workload got real high real fast.
 
Old 03-22-2015, 12:18 AM   #7
dijetlo
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No problem, I'm subscribed to the thread. I hope everybody is feeling better, catch you when you have some time
 
  


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