Macbook Air External Monitor (Mini DP -> DVI) Mouse Lag/Stutter with iTunes

[DaLurker]

The issue: My mouse cursor lags/stutters on my Macbook Air.
Pre-requisites: iTunes is running. External display (Dell 2407WFP) is connected and active.
OS: 10.6.6, iTunes: 10.2.1

I'm noticing a lot of mouse and keyboard lag on my Macbook Air whenever I'm using my external Dell 2407WFP monitor and iTunes is running. It doesn't matter whether I'm in Clamshell or extended desktop, the lag occurs. The only fix is to quit iTunes.

If I'm not using an external monitor, then the cursor is perfectly normal regardless of whether iTunes is on or not.

I know a lot of people have experience issues similar particularly on other machines with external monitor and mouse lag. If you are on of those can you see if iTunes is running? If it is quit the application and see if the problem goes away.

From my experience I firmly believe there is a problem with iTunes, OSX and external monitors connected via Displayport (regardless of whether it is through an adapter or not).

 

[GT-R]

i have a MBA 11 with 4gb ram, external dvi connector to my 25" HP 2509m with itunes running (newest version) and my mouse doesnt lag

i have wireless keyboard and mouse as well via usb

does it lag on your mba as well when connected? or just your external monitor?

 

[Heco]

The solution that worked for me (HD 5770, Mac Pro) was to connect the second monitor via an ACTIVE single link MDP to DVI adapter. Tried before with a passive one and had my mouse pointer jumping. You can get AMD certified adapters for Eyefinity (http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx) - those are all active ones. The dongles sold by Apple are passive adapters except for the really expensive dual link adapter.

Just buy a 3rd party ACTIVE adapter (e.g. the Accell B087B-006B) and everything will go back to normal.

Now my mouse is smooth again with dual display setup!