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renier.britz Author

Level 1

0 points

Screen flicker after Lion upgrade

Mac mini upgrade to Lion – the upgrade was smooth howeveronce it started up for the 1^st time I noticed a flickering screen. Makingany Display changes from System Preferences causes the screen to switch of (sameas when screen has no input) even if I just try to change the rotation, nomatter what I do it does not come back until I force a restart using the powerbutton. I have a Acer monitor connected via HDMI cable, I have had no issuesbefore the upgade. Anybody else seeing the same thing or perhaps have tips toget this resolved.

Thanks mush,

Mac mini, Mac OS X (10.7)

Posted on Jul 20, 2011 2:38 PM

36 replies

Oct 16, 2011 2:43 PM in response to renier.britz

I remported my problems in this thread some time ago and am happy to say that the latest lion iCloud update fixed my display flicker :-)

heiko g

Level 1

0 points

Nov 16, 2011 1:16 AM in response to Jeff Miller2

I had the same flickering problem after the recent upgrade to 10.7.2 on a mid 2010 MacPro 2,8GHz.

Unplugging the monitor cable from the video card during runtime, as suggested by Jeff Miller 2, solved it nicely and, so far, permanently.

dobishop

Level 1

8 points

Jan 24, 2012 11:28 PM in response to renier.britz

This worked on my set-up:

Opened QuartzDebug

Selected Window tab

Selected FrameMeter

Placed FrameMeter 'between' monitors....kind of out of the way - flickering (artifacting?) ended immediately. Flickering begins again if I turn off Beam Sync OR move the FrameMeter into one monitor COMPLETELY.

I use the displayport (adapted to HDMI) and HDMI to HDMI from a 5870.