Hakko83

Q: OSX Lion, Graphic Artifacts

Hello, after i've installed OSX Lion on my iMac 2011 27°, i started getting strange graphical artifacts on my desktop as you can see in this screenshot. http://t.co/5EXmRfL

The graphic artifacts randomly appears, without that i am doing nothing in particular.

 

Is this a common issue? It's a Lion issue (fixable with an update)  or should i format my iMac?

iMac, Mac OS X (10.7)

Posted on Jul 22, 2011 7:03 AM

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Q: OSX Lion, Graphic Artifacts

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  • by alessandro85,

    alessandro85 alessandro85 Sep 29, 2011 1:58 PM in response to Mark Free
    Level 1 (4 points)
    Apple Watch
    Sep 29, 2011 1:58 PM in response to Mark Free

    i have the 2nd monitor too..... maybe is the HDMI/Thunderbolt adaptor???? all of u have a 2nd monitor connect to imac? or anyone have this issue without other monitor connected??mplease answer

  • by Mark Free,

    Mark Free Mark Free Sep 29, 2011 2:18 PM in response to alessandro85
    Level 1 (20 points)
    Sep 29, 2011 2:18 PM in response to alessandro85

    I actually use MDP*-to-DVI adaptor, to which I connect my TV via HDMI-DVI cable (already had this cable from my old setup, so it was cheaper to just buy an MDP-to-DVI adaptor, instead of MDP-to-HDMI adaptor plus HDMI cable).

     

    * - MDP is compatible with Thunderbolt port.

  • by alessandro85,

    alessandro85 alessandro85 Sep 29, 2011 2:37 PM in response to Mark Free
    Level 1 (4 points)
    Apple Watch
    Sep 29, 2011 2:37 PM in response to Mark Free

    is that an original part? i'm using a commercial version of adaptator... but i start issue only with lion... with SL all work fine...

  • by Mark Free,

    Mark Free Mark Free Sep 29, 2011 2:41 PM in response to alessandro85
    Level 1 (20 points)
    Sep 29, 2011 2:41 PM in response to alessandro85

    It's an original Apple adaptor, bought from a premium Apple reseller. And yeah, I doubt it has anything to do with having external displays connected.

  • by Ron,

    Ron Ron Sep 29, 2011 2:44 PM in response to Gondor5
    Level 2 (389 points)
    iPad
    Sep 29, 2011 2:44 PM in response to Gondor5

    "My workaround is to simply add a second monitor via the mini display/thunderbolt port. I am unable the reproduce the artifacts on the finder window when the second monitor is attached. The moment I disconnect the cable, the artifacts come back."

     

    Graphic card output point . . . ?

  • by alessandro85,

    alessandro85 alessandro85 Sep 29, 2011 2:59 PM in response to Mark Free
    Level 1 (4 points)
    Apple Watch
    Sep 29, 2011 2:59 PM in response to Mark Free

    mark u think is not depend by a type of adaptator is connected to imac?

  • by Mark Free,

    Mark Free Mark Free Sep 29, 2011 4:39 PM in response to alessandro85
    Level 1 (20 points)
    Sep 29, 2011 4:39 PM in response to alessandro85

    Well, since the artifacts happen on both displays at the same time and all these adaptor thingies don't commmunicate back to the computer (they only recieve the information), they can't be the cause of the artifacts.

  • by Ron,

    Ron Ron Sep 30, 2011 12:49 AM in response to Mark Free
    Level 2 (389 points)
    iPad
    Sep 30, 2011 12:49 AM in response to Mark Free

    Correct  - but what about the exits on the graphic card that feed those displays . . . ?

  • by Mark Free,

    Mark Free Mark Free Sep 30, 2011 2:22 AM in response to Ron
    Level 1 (20 points)
    Sep 30, 2011 2:22 AM in response to Ron

    If it were the "exits", you wouldn't be able to see the artifacts on your screenshots.

  • by Ron,

    Ron Ron Sep 30, 2011 8:37 AM in response to Mark Free
    Level 2 (389 points)
    iPad
    Sep 30, 2011 8:37 AM in response to Mark Free

    Nor anything else . . . ?

  • by yashrgupta,

    yashrgupta yashrgupta Sep 30, 2011 9:34 PM in response to Hakko83
    Level 1 (0 points)
    Sep 30, 2011 9:34 PM in response to Hakko83

    Here is a video I recorded of my iMac going into a glitch with Mission Control. http://www.youtube.com/watch?v=5YMrU0xF_8c&feature=youtube_gdata_player

  • by g.asm,

    g.asm g.asm Oct 1, 2011 9:29 PM in response to Hakko83
    Level 1 (0 points)
    Desktops
    Oct 1, 2011 9:29 PM in response to Hakko83

    Same Issue on my 2 days new iMac. Happens in the menus bar, dock and dashboard.

    3.4GHz i7, HD Radeon 6970 2gb

  • by Ron,

    Ron Ron Oct 4, 2011 9:27 AM in response to g.asm
    Level 2 (389 points)
    iPad
    Oct 4, 2011 9:27 AM in response to g.asm

    Looks like it might be 'back to support' the  way my desktop is going again with sudden changes in pixel size and involuntary moves to either the top or right corners of the relevent page.    FCPX started crashing now as well but thankfully it doesn't lose content when it does.

  • by Quantum3,

    Quantum3 Quantum3 Oct 4, 2011 12:17 PM in response to Hakko83
    Level 1 (0 points)
    Oct 4, 2011 12:17 PM in response to Hakko83

    I've been experimenting the same problem for many days while trying everything to fix it till I literally couldn't turn on the Mac anymore, so the only thing it worked to me was re-installing Lion. No data lost in the process. And yep, it's an OpenGL problem.

     

    Oh, btw:

     

    Captura de pantalla 2011-10-04 a la(s) 16.16.36.jpg

  • by ByronCox,

    ByronCox ByronCox Oct 4, 2011 4:08 PM in response to ByronCox
    Level 1 (0 points)
    Oct 4, 2011 4:08 PM in response to ByronCox

    I have had these graphic artifacts and was convinced that this was a Lion/AMD Radeon 6970M drivers issue, so I have been patiently waiting for a software update.  I have reported the issue via the Apple feedback form.  3 or 4 days ago I thought that I had better phone Apple Care so that they would have a record there too.  The assistant wanted me to do a PRAM/NVRAM reset, I was sceptical but complied.  This seems to have worked for me - at least so far - I am still a little sceptical, as I am convinced that this is a drivers issue.  I am not saying that it will work for all of you, but for me, so far, it seems to have worked.

     

    Here are the exact steps that I performed:

    1. Turned the power off at the socket.

    2. Disconnected the power cord from the iMac.

    3. Held the power button in on the iMac for 5 secs.

    4. Reconnected the power cable and turned on power at the socket.

    5. Turned on the iMac.

    6. At the chime, held down COMMAND+OPTION+P+R. Keep holding.

    7. Once the iMac chime's again let go of the keys and let the iMac start.

     

    Not meaning to sound like I am teaching you to suck eggs with the instructions for the PRAM/NVRAM reset, I just wanted to give you the exact instructions that I followed :-)

     

    I will let you know if the artifacts reappear at any point.

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