Currently Being ModeratedFeb 21, 2013 4:52 PM (in response to rspRoland)
Oh I forgot to mention the weird part:
After waking up, for about 4-5 seconds the graphics performance is perfectly normal, only after those 4-5 seconds the performance drops substantially.
Currently Being ModeratedMar 22, 2013 6:21 PM (in response to rspRoland)
Still seeking help
Edit: I also tried swapping the RAM I installed to the one that came with the Mac. Nothing changed, so it's not the RAM's fault.
Currently Being ModeratedMar 22, 2013 7:31 PM (in response to rspRoland)
I've read of Mac Pro users having this problem on non-standard video cards, but never an iMac. I guess if it were my mac, I would try this.
Disconnect all but keyboard/mouse
1) Reboot and at the chime, hold D....This should invoke apple hardware test. If this doesn't work, reboot and hold Option-D This is the internet version of Apple hardware test. Run the test just to make sure you don't have a hardware problem.....if good
2) Reboot into recovery (Command-R), check the HDD for errors (repair hard drive). If it comes back good, then I would reinstall the OS over the top of the existing OS. You won't lose anything and if something is mucked up, it could fix it.
An alternative to (2) is to redownload Mountain Lion from the MAS and then run it, select your "Macintosh HD" for the install target.
The reason I would do these two things is to have confidence that my hardware/software is good.
Currently Being ModeratedMar 22, 2013 7:36 PM (in response to ssls6)
I forgot to add, please make sure you have a good TM backup and a clone to be really safe. You said you've had this problem forever, do run the AHT.
Currently Being ModeratedMar 23, 2013 2:31 AM (in response to ssls6)
Interestingly, I just did the internet AHT last night before I went to sleep, came out good.
I have an SSD, nothing to check for errors. Or is it prone to other kind of errors and I should go ahead and check it anyway?
I doubt it's the software, this happens on newly created accounts as well. Hmm, guess I can try to reinstall ML, see if it still behaves like this and if yes, just restore from TM. And if the problem is gone ... Well, for one I'll be happy, on the other hand I will cry a little inside, it'll be such a pain to reconfigure everything, heh :)
I have a manual copy of the library folder, after I reinstall ML and reinstall all my programs, can I just copy Application Support and Preferences to get all my settings back?
Currently Being ModeratedMar 23, 2013 6:10 AM (in response to rspRoland)
Hmm. Weird. In the past I repaired the drive but I never found errors, just like now. I also repaired perimissions in the past (but from the Disk Utility), not from the System Recovery like now (don't know if that makes any difference), it found some to repair and now it works fine.
I have no idea what happened, because except permissions nothing broken was found.
Edit: talked to soon, it appears I still experience the same problem, but not always, like before.
Currently Being ModeratedMar 23, 2013 9:59 AM (in response to rspRoland)
Ok, found one of the things that was causing this. I'm saying one of because, as I said, even though nothing got fixed, I don't get this problem anymore unless:
I start Parallels 7 AND open a game, close it then go to sleep. When I wake up, really bad graphic performance. If I open Parallels 7 and DON'T open any game, take it to sleep, when waking up everything works just fine.
Parallels 8 doesn't do this, so I suppose it's directly related to Parallels' DirectX support and something gets messed up (in the GPU memory, probably, because for a few seconds after waking up, everything works fine).