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[Boudhayan Gupta <748137@xxxxxxxxxxxxxxxxxx>]

Just a heads-up: If I disable Sync to VBlank in CCSM, and keep Tear Free
Desktop enabled in AMDCCCLE, I get normal performance, as well as no
tearing (because AMD is handling it at the driver level). I guess the
whole issue was because vblanking was being done twice (once at the
Compiz level and another at the FGLRX level), and this was putting a
huge load on the GPU with performance regression.

My card is a ATI Mobility Radeon HD4330

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which is subscribed to fglrx-installer in Ubuntu.
https://bugs.launchpad.net/bugs/748137

Title:
  unity rendering broken with fglrx (black masks)