Comment 45 for bug 1634449

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Chris Pedersen (ubuntucuro.dk) wrote :

This is likely a problem with the power saving mode in the kernel driver i915.

https://wiki.archlinux.org/index.php/intel_graphics

I have created a file i915.conf in /etc/modprobe.d/

contents of i915.conf:

options i915 enable_rc6=0

then the problem has disappeared for me.