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Old 08-23-2014, 11:46 AM   #1
gonny95
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Registered: Feb 2014
Distribution: Slackware,Ubuntu
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Fix i915 driver


I'm using Ubuntu 14.04 LTS 64bit on a Laptop.
The problem is that screen keeps blinking like rainbow.
This is what happened on my laptop http://www.youtube.com/watch?v=mOY4R...lhPcxGm7IpyLWw
My workaround was editing /etc/default/grub.
Code:
GRUB_CMDLINE_LINUX_DEFAULT="text i915.modeset=0"
But that wasn't a perfect solution, because I can't adjust screen brightness and laptop becomes so slow when I play graphical games after that.
So I want to know if there is a better solution.

Last edited by gonny95; 08-23-2014 at 11:51 AM.
 
Old 08-23-2014, 03:28 PM   #2
business_kid
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Registered: Jan 2006
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It looks like the old 'sound on video' behaviour from TVs. There is low frequency interference. Perhaps the mode is switching continually.

TVs had sound and video separated by a few Mhz (5.5 Mhz most of Europe). Ireland, where I live, used 6 Mhz, so issues were common. If you were mistuned you got that effect as the sound got through onto the video.
 
Old 08-23-2014, 06:03 PM   #3
gonny95
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Sorry my English is bad so I can't understand your reply 100%... so do you know the solution?
 
Old 08-24-2014, 02:43 PM   #4
business_kid
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There is a low frequency interference on the video. That is what I see in the video on youtube.

I don't know why. You said that "i915.modeset=0" fixes it. So it could be KMS. I would look for a video software update, or file a bug.
 
  


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