Comment # 56
on bug 93826
from Eike
(In reply to iuno from comment #52) > It could be fixed by increasing the default display clock: > https://people.freedesktop.org/~cbrill/dri-log/index. > php?channel=radeon&highlight_names=agd5f;grmat&date=2017-01-03 > > > @Eike: you have a faulty monitor, please don't suggest people here to send > theirs back because there certainly *is* a software issue. > > @Jonas: Did you try forcing the mclock to high? It doesn't require a higher > core dpm state but should fix your problem. Sorry to correct you, but my monitor has not been faultier than any other MG279Q that was bought before 2017. I already had TWO other MG279Qs before this one, both had the problem I described. The ROG forum thread I have linked shows the SAME artifacts I have described and these have definitely been fixed on multiple platforms by the mentioned firmware update. BTW I have tried the mclock increase before RMAing my monitor and it did not work at all. Please differentiate between the artifacts I described (left half of the screen is offset to the right, a vertical stripe that should be in the middle is displayed at the left side of the screen) and other artifacts which could in fact be caused by a low mclock or other problems. The described artifacts might be fixable by software (e.g. Windows with certain driver combinations does show these artifacts, but does not with others), but ARE CAUSED by the faulty MG279Q firmware. I have not found any combination of OS and drivers that caused these problems on the fixed monitor, but found several on multiple "not fixed" MG279Qs in the past.
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