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On 12.04 64-bit, about every 5 seconds my screen blinks twice. Even during installation of Ubuntu from CD, this happens during the complete process.

I had no problems with earlier Ubuntu versions (earlier version was 10.04LTS 64-bit)

System specs:

  • I7-2600K
  • MSI 7681 Motherboard
  • 16 GB RAM
  • 2 x Nvidia 560 card SLI (only 1 screen on 1 card active during install process)

This flickering is driving me crazy, please help.

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Did you check if it only occurs when using only the laptop battery as source of power? That's my case. If I connect the charger the problem finishes. I don't know how to solve it... – Luis J. Romero Aug 22 '14 at 22:57

Try this to make sure you have the best driver for nvidia cards

Add the PPA for nvidia

sudo apt-add-repository ppa:ubuntu-x-swat/x-updates

Update software sources

sudo apt-get update

Download the driver

sudo apt-get dist-upgrade

Then reboot

This fixes many nvidia issues so may help you

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The original version of drivers did good on my setup. After installing the latest drivers using the above procedure the blinking effect appeared. I'm currently using the 304 version. – Matthias Hryniszak Apr 4 '13 at 20:20

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