Mouse lags with 10.5.6

Definitely something wrong with drivers. I even tried with my 8800GTS, 320MB, the same thing. Rolled back to 10.5.5 drivers.

Something strange here. I fixed the issues, though i did nothing particularly big. I was messing with efi strings (with 8800 GTS -320) and tried with new one created with latest EfiStudio v.1.0. I reinstalled 10.5.6Update again.

Right now iTunes, QuickTime and VLC are running at the same time. No mouse lag and no graphical problems at all.

nfoav8or, There was no big difference in efi strings. My previous one was working just great since i installed the system. I was also injecting graphic strings via dsdt, working great, so completely removed device-properties from com.apple.boot. So i am a bit unsure here if it was new string from efistudio or reinstalling 10.5.6 update. Lots of people were complaining about mouse lags in iT/QT with nvidia 8xxx serie but definitely graphic drivers are not broken. Re-installing the update and trying with new string should fix the issue. Worked for me.

Yes, could be a good solution. But i didn't downgrade anything.

It affects some cards from 8xxx series like 8500, 8600, 8800. Didn't affect my 8800 GTS though. Could be the case with your 6800 also. Not to downgrade the drivers just follow the post above (cyclonefr fix) if you updated quicktime/itunes. If you didn't upgrade QT/iT and still have the mouse lag then the cause is something different.

Cyclonefr made a post on apple support.

discussions.apple.com/thread.jspa?messageID=8635578�

So more info there

@milanca... and tried with new one created with latest EfiStudio v.1.0. I reinstalled 10.5.6Update again. Right now iTunes, QuickTime and VLC are running at the same time. No mouse lag and no graphical problems at all.

so the latest version has better hex strings for some of the hardware instead of just the normal addition of new hardware? nice to hear.

Cyclonefr posted a solution here,
http://forum.insanelymac.com/index.php?showtopic=142056 ↗

Seems to be the best one...

how did you downgrade to 10.5.5 drivers? i am currently on iPC 10.5.6 with a fresh install as last time i installed graphics drivers, i got mouse lag and it made the system unusable. i have an xfx nvidia 6800gt card (10de:0402] (rev a1) and i'm unsure which drivers i should be using on 10.5.6 to avoid these mouse lags. i've installed steermouse just in case but apart from that i have a fresh system? i might add that it wasn't just using itunes and quicktime that i had lag, i had lag pretty much all the time after rebooting with the graphics drivers installed.