Comment 0 for bug 763005

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Jiri Grönroos (jiri-gronroos) wrote : Fglrx with Compiz's "Sync to Vblank" makes Unity/Compiz plugins to crawl

Package: fglrx
Version: 2:8.840-0ubuntu2

01:00.0 VGA compatible controller: ATI Technologies Inc Juniper [Radeon HD 5700 Series]

I have ATI's 5770 with fglrx. Having "Sync to Vblank" on makes Unity and many Compiz features (Enhanced Zoom, Scale etc.) really slow. Turning "Sync to Vblank" off has a huge effect on desktop, responsiveness is much, much better. Turning "tearing" off/on from amdccle doesn't seem to have any effect on responsiveness.

In Maverick "Sync to Vblank" was off by default, in Natty it's on. This will probably have a huge impact on many fglrx users.