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Sleepy monitor
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PCNetSpec
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Joined: Sun Feb 21, 2010 3:50 pm
Posts: 631
Location: Cornwall UK

PostPosted: Wed Aug 31, 2011 3:52 pm    Post subject: Reply with quote

No, (to test it) you need to add it to the kernel boot line in GRUB

See here:
https://help.ubuntu.com/community/Grub2#Editing_the_GRUB_2_Menu_During_Boot

you need to add vesa=791 after quiet splash

so the end of that line reads

quiet splash vga=791

Then hit Ctrl+X to boot.

This will NOT survive a reboot, but if you're sure it helps... I'll tell you how to make it permanent.
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TheWizardofOdds
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Joined: Sun Sep 28, 2008 2:37 pm
Posts: 180

PostPosted: Tue Jun 19, 2012 12:38 am    Post subject: Reply with quote

Months later, the same problem persists.

Unfortunately PCNetSpecs' excellent instructions are still beyond my rudimentary Linux skills, so until I can find my brave pills and give it a go, I was wondering if anyone else has experienced this? ( Monitor going in to sleep mode)

The original monitor that came with the PC, the one I prefer, still goes to sleep mode every now and then when I start up, stating 'no VGA Input'. I can boot up the PC and monitor every day for weeks and there's no problem and then for a few days it'll be a case of switching off and on tens of times until the screen kicks into life. There doesn't seem to be any rhyme or reason to it? Not a massive drama but definitely irritating.
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Ram
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Joined: Thu Apr 07, 2005 10:44 pm
Posts: 1671
Location: Guisborough

PostPosted: Tue Jun 19, 2012 1:06 am    Post subject: Reply with quote

Does your video card also get its power from the PSU via lead with either 4 or 6 pin connector.
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greg.d



Joined: Thu Oct 27, 2005 9:29 am
Posts: 24

PostPosted: Tue Jun 19, 2012 2:23 pm    Post subject: Reply with quote

Does your monitor have a DVI input? Could you get hold of a DVI cable and plug DVI - DVI directly, would test the monitor input then.
Sounds to me as if the monitor is on its way out. One of mine had a similar thing, it would just switch off and wouldn't come back on, or would continuously switch on and off over and over.
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