Same problem here, Macbook Pro with
01:00.0 VGA compatible controller: nVidia Corporation GT216 [GeForce GT 330M] (rev a2) (prog-if 00 [VGA controller]) Subsystem: Apple Computer Inc. Device 00c7 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 16 Region 0: Memory at c0000000 (32-bit, non-prefetchable) [size=16M] Region 1: Memory at 90000000 (64-bit, prefetchable) [size=256M] Region 3: Memory at a0000000 (64-bit, prefetchable) [size=32M] Region 5: I/O ports at 2000 [size=128] [virtual] Expansion ROM at c1000000 [disabled] [size=512K] Capabilities: <access denied> Kernel driver in use: nvidia Kernel modules: nvidia, nouveau, nvidiafb It's really slow when I connect another monitor. It was slow with Natty, too, but not at unusable like the new Ubuntu version. I have tried different version of the Nvidia graphics driver without any success to make it better. I noticed that after plugging in the monitor compiz needs unusal long to "recover". -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/877438 Title: Unity compiz plugin makes display slow on multi-screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/877438/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs