Graphics choppy on F14 KDE

[mpn]

Hey all. I'm experiencing choppy graphics on my new F14 install in KDE -- things like scrolling in Firefox, showing/hiding windows, and the equalizer bars in Audacious all being a bit laggy.

The card is some kind of onboard intel; the laptop is a Lenovo g550. Here's what lspci says:

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 09)
        Subsystem: Lenovo Device [17aa:3a02]
        Kernel driver in use: i915
        Kernel modules: i915
00:02.1 Display controller [0380]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a43] (rev 09)
        Subsystem: Lenovo Device [17aa:3a02]

Does anyone have any general advice on how to diagnose/fix?

P.S.: It seems to be this way whether or not Desktop Effects are turned on.

[marriedto51]

I would check the set-up guides to make sure you have the best video drivers installed, but you could also play with the settings at System Settings -> Application Appearance -> Style, then the Fine Tuning tab to see if that helps.

[mpn]

Thanks, marriedto51.

I looked at http://www.fedoraguide.info/index.ph...ain_Page#Intel and it says only "Intel users, cheer to yourself as it works out-of-the-box."

Tried the tweaks as well, with no success.

Does anyone have any other ideas? glxgears seems to run fine, but still there are all the problems I mentioned in my OP.