Graphics glitch on Cinema Display

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Graphics glitch on Cinema Display

After installing 10.5, a graphics glitch started on my Cinema display, where a few lines of multicolor random dots are drawn across the screen. I have a screenshot and wish I could upload it! Anyway, but it looks like some code is overwriting the raster. It is a stable glitch, does not get worse over time, so it isn't a memory leak. If an app like Firefox or Eudora is open, the lines get written into those windows, and will disappear if I hide the window and restore it.

I have two monitors, a Multisync LCD2180UX and the Apple Cinema HD Display, and his glitch is happening ONLY on the Cinema display. However, if the lines are written into an app window, the glitch is visible on the Multisync, after I drag the window into that display.

Finally, strange square blips of color appear and disappear every so often now.

Anyone know what's happening? Any suggestions? (No way I'm lugging the desktop and monitor to the Apple Store. I'm assuming that it's something that will be fixed by 10.5.2.

Thanks!

Power Mac G5, Mac OS X (10.5.1), 3 GB RAM & ATI Radeon X1900 XT graphics card

Posted on Dec 9, 2007 11:23 AM

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Answer 1

Moses Ma Author

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Dec 9, 2007 5:56 PM in response to Moses Ma

Also, Leopard is freezing on boot about 20% of the time. Oy, maybe they shoulda done a bit more testing before releasing this?

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Answer 2

Moses Ma Author

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Dec 12, 2007 10:31 PM in response to Moses Ma

It's STILL crashing on boot some of the time. But I've ascertained that if I let it boot all the way, it'll stay up a day or so before freezing up. But if I fiddle with the mouse or access the dock while booting... crashola, total freeze up. It might be a bug with the dock code because a couple of times, it crashed during boot with the dock half hidden.

Is anyone else experiencing this problem?

Message was edited by: Moses Ma

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Answer 3

GTK

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Jan 28, 2008 9:14 PM in response to Moses Ma

Seen the same issue on my 30" CD/G5 PM set up. Ended up going back to 10.4.11 due to additional issues.

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Answer 4

Str1cken

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Mar 5, 2008 5:24 PM in response to Moses Ma

I've had similar problems, now with the additional problem of frequent, unrecoverable crashes. "Freezes" may be a more appropriate term.

I get strangely colord single-pixel lines across the screen both in regular browsing in firefox and when playing back video in Final Cut Pro.

Sometimes these lines stay on the screen when I move the windows around, sometimes they can be "erased" by moving the window away and back.

I have had a very bad time indeed, and no apparent solution.

Message was edited by: Str1cken

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Answer 5

Moses Ma Author

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Jul 2, 2008 6:23 AM in response to Moses Ma

Yeah, I found out that it was a glitchy graphics card... when I replaced my Radeon X1900 (the only one that supports dual DVI for my two large monitors), the problem went away.

So watch out for this: weird lines or dots painted on the screen, as if the raster memory is being overwritten; those lines change when you move windows around or resize them; after 30 minutes the system crashes.

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