Lion graphics extremely slow with Radeon HD 2600 Pro 256MB

I beleive it may have something to do with screen sharing, remote login, remote managment, and remont Apple events. I disabled them all from the sharing prefpan and the system is running far better now.

My system is MBP late 2010 with clean lion installation.

Regards.

No change regarding the sleep/wake performance loss issue.

Thanks m7ossny,

Same problem here

Model Name: iMac early 2008

Model Identifier: iMac 8,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2.8 GHz

L2 Cache: 6 MB

Memory: 4 GB

Chipset Model: ATI Radeon HD 2600 Pro

VRAM (Total): 256 MB

ROM Revision: 113-B2250L-259

EFI Driver Version: 01.00.259

Animations are sluggish. Full screen, launchpad, even youtube videos are irritating after some point. Restart doesn't seem to make such a big difference. Tried disabling screen sharing too but i don't see any difference.

Hello,

I've an Early 2008 iMac (20", Core 2 Duo 2,4 Ghz with 4 GB of RAM). ATI Radeon HD 2400 (128 MB) graphic card.

It worked perfectly under Snow Leopard.

Since updated to Lion, I'm facing very slow Launchpad, slow animation when minimizing a window... Lion is usable but it's not pleasant due to its slow graphics. In fact, it works fine just after a reboot. But when I wake my computer from sleep it's slow again.

I've tried everything : repairing permissions, doing a clean install, then an update from Snow, then formating the hard drive, closing all background processes,... It helps temporarily but a few hours later it's slow again.

Rolled back to Snow Leopard : everything is smooth, even after waking my computer from sleep.

Same problem here. My iMac is very slow - especially with graphics and animations - under Lion. Looks like a driver problem.

Model Name: iMac early 2008

Model Identifier: iMac 8,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2.8 GHz

L2 Cache: 6 MB

Memory: 4 GB

Chipset Model: ATI Radeon HD 2600 Pro

VRAM (Total): 256 MB

Switched back to Snow Leopard. Runs smoothly.

Has anybody tried to install 10.7.2 (released a few minutes ago) ? Or willing to do it ?

For now I'm staying with Snow Leopard until I have feedbacks 😝

Are there any release notes regarding our problem? Does something change with 10.7.2?

10.7.2 did not correct this on my machine. I still have poor performance after wake from sleep on my 24 inch Early 2008 iMac with the ATI Radeon HD 2600 Pro 256 MB.

My experience with 10.7 says wait. I wish I was back on Snow Leopard.

The new update is mainly to enable iCloud and fix few full screen issues. I installed it on my MBP and iMac. So far it did not cause any UI troubles but it is too early to tell considering that it restarted both my MBP and iMac.

I guess by tonight or tomorrow tops after different screen resolutions and monitors being tried out I can have a good perception of the performance of the new update.

Regards

M

Add me to the list... I've to downgrade to Snow Leopard, my mac is an iMac 8,1 with ATI Radeon HD 2600 Pro, works great until it comes to sleep... then, after wake, any gpu task run very slow on it... only reboot fix it.

Add me to the list... I've to downgrade to Snow Leopard, my mac is an iMac 8,1 with ATI Radeon HD 2600 Pro, works great until it comes to sleep... then, after wake, any gpu task run very slow on it... only reboot fix it.

I am experiencing the same issue on the same configuration. Have disabled sleep for now. Using shutdown instead every time I am not using my iMac. Clearly not an ideal solution but it does circumvent the problem.

Same here. iMac 8.1 with Radeon HD 2600 Pro and "insomnia", I tried lots of things but always need to reboot. I don't understand why Apple (after several months and two revisions of Lion) didn't fix it. There are thousands of users frustrated with this annoying bug saying "Lion is crappy Apple's Vista" and this is very bad publicity. I hope that 10.7.3 fixes it...

just posting here won't help. apple products are so full of bugs that a thread like this just goes unnoticed.

there are 2 ways to force apple to fix this:

• everyone who posted here should file a bug at bugreporter.apple.com. if everyone would have done earlier it would probably have been fixed for 10.7.2 already

• force apple to fix it through bad press - perhaps someone who encountered this bug has some connections. honestly this bug is such a bad showstopper that a story like "Lion unsable on all ATI Macs" would be true and if this would circulate in the press this would force apple to prioritize things more sanely. who cares iCloud if you can't even use the thing.