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. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1634449 Title: Black flicker when leaving monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1634449/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
