Comment # 29 on bug 93826 from Michel Dänzer

(In reply to Yves W. from comment #27)
> - with default driver and default kernel (Linux Mint 18 -> 4.4.0-38-generi)
> it's working at 2560x1440 @144hz, no flickering issues.
> 
> -> tried using the Ubuntu 4.8.0 kernel -> flickering at 2560x1440 @144hz,120
> and 100hz. only 60hz works without flickering

Can you bisect, or at least narrow down which version between 4.4.0 and 4.8.0
introduced the problem?