Lion graphics extremely slow with Radeon HD 2600 Pro 256MB

I can not confirm this, brunopinho. I have the Radeon 2600 and no problems with ML.

OK, to summarize: 10.7.3 fixes the bug with slow graphics after sleep for Macs with Radeo 2600 family. Meanwhile, Radeon families 4xxx, 5xxx and 6xxx are still affected (not all of them, only certain Mac models). Two fellas abovepointed out they still have problems with 4 and 6 generation of Radeons, and I am still have the same issue with my 5770.

The only solution I found besides using old drivers comes from hackintosh community. The solution says to change your hardware id, so this won't work on any real Mac.

How can I get these files??? Mega Upload has been shut down by the FBI.

I have tried checking ATI's website...

I tried posting this to lion section of app store and apple deleted it...

I think Apple fix this bug on !0.7.3 and on 10.8 DP 2 but if u need:

http://dl.dropbox.com/u/518190/ATI%20FIX%20LION.zip

Thanks for your reply.. But sadly no it is still persistant. Video freezing, even playing off the machine it'self I ran hard ware test applied all updates (running 10.7.3, on 2008 imac) I hope these files work I will give it a try.

mac pro 2008 (3,1) with ati 5870, same issue, after reboot performance is good, sleep, wake, performance is ~33% on gpu

with nvidia 285 gtx no problems - hoping for a fix as the ati card is faster 🙂

I might get brace and try the kexts, will update if it works for me.

I've got an iMac 27" (late 2009) with ATI Radeon HD 4850 and Diablo 3 had an open beta this weekend (last Friday until this week's Monday). Friday night when I logged in, it worked really great. I quit the game and went back on in a few hours and it was horrible. It was very very slow and still is (I can see the login screen only because I have no real beta acces, but that's slow too). Saturday night when Diablo 3 was very slow I went back to COD4 and it was slow too! But it wasn't before installing/playing the Diablo 3 so I have got no idea why... COD4 is still very slow too.

Restart your Mac and check again. If performance wasn't restored to the original level then it's completely different issue.

Didn't restore to the original level. What do you think the 'completely different issue' might be then?

Lowered GPU performance may be caused by

1. A software that works as a display driver, like Air Display which allows you to use the screen of an external device as an additional desktop display. Noticed only on Lion. Not likely in your case, because only recently your Mac was working fine.

2. Overheating. Never noticed that with iMac however encountered it several times on Mac Books. When GPU is overheated it drops operating frequency to avoid damage. Mac Books air exhaust was clogged with cat's fur in my case. But when turned on your Mac should work fine at least several minutes before reaching critical heat levels, so it doesn't look like it either.

3. Some hardware configuration / power management issue. One way to fix it is to do SMC reset: http://support.apple.com/kb/HT3964?viewlocale=en_US&locale=en_US . Another way is to delete current power management-related .plists; you can find instructions earlier in this thread.

smc reset + deletion of power management plists actually seems like it's fixed my slowdowns of an ati 5870 on mac pro early 2008 (3,1) running lion 10.7.3

cheers Viktor!

Wow, this is interesting! I have same Mac Pro 3,1 and Radeon 5770 on 10.7.3 and neither procedure helped my system. I don't believe this is all due to a graphics card or Mac hardware configuration difference. It looks like more of a upgrade problem, when you had previous OS installed which then has been upgraded to Lion.

I've upgraded from a (then) clean 10.6 installation with lion, all through 10.7 over .1, .2, .3 - if that's any help.

I'll toss a note here one of the next days on how it keeps working or not.

Update... Installing .kext files have killd imac. It will restart but then the screen goes black and the only fix is restart, machine runs a little and then screen goes dark (even in safe mode) I hav zapped pram still no luck... Hmmm