Snow Leopard Graphics Glitches
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From: Peter on 2 Jul 2010 07:18 Hi, I have been getting some odd behaviour recently with my machine. I am using Snow Leopard 10.6.4 but I noticed the problem first using 10.6.3. I am getting strange graphical glitches on my screen from time to time in the form of a line or lines. There is a screen shot available here: http://www.badrick.plus.com/glitch.jpg From my PC days I get the feeling that my GPU could be overheating? However, it is infrequent and only pops up in app windows. The glitch moves with the window. It mainly happened when using Safari 4, so I hoped Safari 5 would fix it, then I noticed it in other apps (System Profiler where the shot was taken and also in Coda). Looking at the Apple forums, other people seem to be having glitches with SL, but not the same as these and with much newer machines. Is my machine beginning to fail (nearly 5 years old)? It has recently had a clean install (drive wiped) and this didn't solve it. Also, going from .6.3 to .6.4 hasn't helped. Any ideas? System specs below. Fingers crossed, Pete. Model Name: iMac Model Identifier: iMac5,1 Processor Name: Intel Core 2 Duo Processor Speed: 2.16 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache: 4 MB Memory: 3 GB Bus Speed: 667 MHz Boot ROM Version: IM51.0090.B09 SMC Version (system): 1.9f4 Serial Number (system): CK6430D7X0E Hardware UUID: 00000000-0000-1000-8000-0016CB93B4F1 ATI Radeon X1600: Chipset Model: ATY,RadeonX1600 Type: GPU Bus: PCIe PCIe Lane Width: x16 VRAM (Total): 128 MB Vendor: ATI (0x1002) Device ID: 0x71c5 Revision ID: 0x0000 ROM Revision: 113-xxxxxx-139 EFI Driver Version: 01.00.139 Displays: iMac: Resolution: 1680 x 1050 Pixel Depth: 32-Bit Color (ARGB8888) Main Display: Yes Mirror: Off Online: Yes Built-In: Yes Display Connector: Status: No Display Connected
From: Jaimie Vandenbergh on 2 Jul 2010 07:33 On Fri, 2 Jul 2010 12:18:26 +0100, Peter Badrick wrote: >I am using Snow Leopard 10.6.4 but I noticed the problem first using 10.6.3. > >I am getting strange graphical glitches on my screen from time to time >in the form of a line or lines. There is a screen shot available here: >http://www.badrick.plus.com/glitch.jpg > >From my PC days I get the feeling that my GPU could be overheating? >However, it is infrequent and only pops up in app windows. The glitch >moves with the window. It does look like a gfx card problem. You're long out of warranty, I see... Most of the graphics problems people are complaining about currently are the somewhat ropy drivers for nVidia cards that came with 10.6.4, so you can discount those with your ATI. >Is my machine beginning to fail (nearly 5 years old)? It has recently >had a clean install (drive wiped) and this didn't solve it. Also, going >from .6.3 to .6.4 hasn't helped. The clean install (or a fresh partition with a test install) would be what I'd have recommended as a useful troubleshooting step. Since the fault survived that, I think you're definitely on a hardware failure. Have you run the Apple Hardware Test, extended version? Boot off your install DVD with the D key held down to get into it. The extended test will spend some time checking out your graphics card RAM. Apple will quote for repair, but it won't be a quote you'll like at all... Cheers - Jaimie -- Power corrupts, but intermittent power corrupts absolutely -- Jeff Bell, asr
From: Elliott Roper on 2 Jul 2010 08:36 In article <2010070212182670388-(a)news.plus.net>, Peter Badrick wrote: > Hi, > > I have been getting some odd behaviour recently with my machine. > > I am using Snow Leopard 10.6.4 but I noticed the problem first using 10.6.3. > > I am getting strange graphical glitches on my screen from time to time > in the form of a line or lines. There is a screen shot available here: > http://www.badrick.plus.com/glitch.jpg > > From my PC days I get the feeling that my GPU could be overheating? > However, it is infrequent and only pops up in app windows. The glitch > moves with the window. That looked like my ATI XT1900 just before it died from overheating due to too much carpet in the heat sink. After that it did yellow "bruises"; then it would send the screen black; then it would crash the Mac. Now it sits in a box of junk in the barn. I think. I don't know about the X1600 in your iMac but it might be worth blowing the dust out of its heat sink if it has one. You might try the iStat Pro dashboard widget to get a report on the temperatures inside you machine. -- To de-mung my e-mail address:- fsnospam$elliott$$ PGP Fingerprint: 1A96 3CF7 637F 896B C810 E199 7E5C A9E4 8E59 E248
From: Jim on 2 Jul 2010 08:45 On 2010-07-02, Peter Badrick <Peter> wrote: > I am getting strange graphical glitches on my screen from time to time > in the form of a line or lines. There is a screen shot available here: > http://www.badrick.plus.com/glitch.jpg I can't help much with the problem (although it does feel rather like a graphics card that's about to fly south for the summer) but when I visit that link in Safari under XP I'm getting AVG popping up a threat alert for 'Exploit Rogue Scanner (type 1144)'. No idea what that is but I thought you might like to know. It's probably just AVG getting confused about something... Jim -- Twitter:@GreyAreaUK "If you have enough book space, I don't want to talk to you." Terry Pratchett
From: Peter on 2 Jul 2010 09:16
On 2010-07-02 13:45:51 +0100, Jim said: > On 2010-07-02, Peter Badrick <Peter> wrote: > >> I am getting strange graphical glitches on my screen from time to time >> in the form of a line or lines. There is a screen shot available here: >> http://www.badrick.plus.com/glitch.jpg > > I can't help much with the problem (although it does feel rather like a > graphics card that's about to fly south for the summer) but when I visit that > link in Safari under XP I'm getting AVG popping up a threat alert for > 'Exploit Rogue Scanner (type 1144)'. No idea what that is but I thought you > might like to know. > > It's probably just AVG getting confused about something... > > Jim I can assure you that there is nothing to worry about with that link. Probably just AVG. I've just checked it with my Windoze laptop running Avast and its clean. Pete. |