I recently bought Lenovo Ideapad 720s (4K) and Dual Booted Ubuntu 18.04. However the screen is Flickering. I faced this even while installing but thought it would not happen once Ubuntu was set-up. I have tried the approach mentioned in Asus Zenbook UX391UA - Screen flickers but still no success. I am attaching a video for the same :
https://youtu.be/Fz7JkVIMPlk
Specs:
8GB of RAM
Core i7-8550U
Intel UHD Graphics 620 (Kabylake GT2)
GNOME 3.28.2
The only workaround that I have found is to unplug power and then plug back in.(Works 98%). This issue has made my life miserable as it resurfaces as soon as I even lock sceen (and the screen turns off).
Please HELP!
This is actually a bug with the intel drivers and looking at their responses, I guess chances of it getting fixed anytime soon are bleak! Someone came up with a quick "fix" though. Add i915.fastboot=1 to the kernel parameters. No flickering when booting and thereafter.
However, any time your screen turns black (screen lock or sleep) and starts again, flickering would return.
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