[Bug 93826] 144Hz graphic glitches and bad refresh rate

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93826

--- Comment #22 from untoreh <bassobassista at gmail.com> ---
I have a 290, monitor benq xl2411t.

Pushing high resolutions both in grub or xorg file produces glitches. They are
very noticeable at 120/144hz less noticeable at 100hz but still present. They
appear if I set `video=1920x1080 at 120` option at boot time, or add a modeline
with cvt in a xorg .conf file.

However if I remove the modelines from the conf file and just do a `xrandr -r
100/120/144` I have no glitches at all with any resolution. 

Setting a modeline with `cvt -r` also works, of course the only other mode
possible is 120 because it requries multiples of 60 but it has 0 glitches and
it works even buy setting it in the .conf file

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