Fix i915 driver

gonny95 · 08-23-2014, 10:46 AM

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.

business_kid · 08-23-2014, 02:28 PM

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.

gonny95 · 08-23-2014, 05:03 PM

Sorry my English is bad so I can't understand your reply 100%... so do you know the solution?

business_kid · 08-24-2014, 01:43 PM

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.