Comment # 25
on bug 99801
from Matthew Treinish
(In reply to Jean-Yves Avenard from comment #21) > Adding some likely unhelpful info. > But I've had similar (though not the same) problem since I got this screen. > However, unlike most comments, I do not get two steady, mis-aligned image on > each half of the screen. > > The effect is an enormous flickering, mostly on the left half, with colour > cycling. The screen internal menu can no longer be displayed. > > Any long exposure to that mode would cause seizure to any healthy person. > > The only work around to get out of that mode is to disable one of the screen > and set the remaining half to 2560x1440 resolution only. > > Typically, after entering this corrupted mode, the screen will flicker > continuously sometimes for hours. One day, I even thought I broke the screen > as it was still flickering one day later and got HP to replace it. > The new model did that same thing (actually all 4 HPz27q I got, as it took a > while to get one without stuck pixels) > > I get the same effect with both a mac pro 2013 (dual AMD D500 aka AMD 7800) > or with a PC with an AMD Vega 64. > > I'll take a picture of what it looks like and upload. FWIW, this description is more or less exactly what I'm experiencing on my display as well. (although I never tried the screen internal menu piece) I probably just didn't do a good job taking a picture and/or describing it.
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