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I have Acer TM 8104 WLMi laptop with 15,4" WSXGA+ (1680x1050@60Hz) and ATI Radeon X700 and ati-drivers.
My screen has started to flicker sometimes (you can see it easily when you open samething with white background). It flickers often, and when I turn it off, then it may have a very little pause without flickering.
It has not flickered always, and I'm not sure if I've changed something.
May it be because of wrong HorizSync/VertRefresh values in xorg.conf? My HorizSync is set to 31.0 - 83.0 and VertRefresh 56.0 - 63.0. I really don't have manual or anything so I can't check the correct values from anywhere, have tried to Google around it.
Can varying those HorizSync / VertRefresh randomly break my screen? I've tried quite many values there.
HorizSync / VertRefresh generally aren't used for LCDs, so it's more likely a physical problem with the screen itself. The refresh rate doesn't mean anything either as LCDs work in a different way to CRTs and don't have a concept of refresh rate in the same way.
Does it flicker in the BIOS too? If not, then it could be software-related.
May incorrect DPI cause flickering? I've set DisplaySize in xorg.conf to get correct DPI (something like ~128?). I think that's not good DPI since many websites using pt as unit in fonts looks so ugly with way too LARGE fonts. Could I use startx -dpi 100 to get more nice look regardless the correct value, without problems?
Caveat:
- I use an LCD rather than a CRT: the refresh rates are supposed to be ignored
- I recommend copying xorg.conf into xorg.conf.back (or whatever) just for safety
Anyway, it s-e-e-m-s to prevent the flickering screen that often occured when I would log off and try to re-login.
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