Hi, After installing several Ubuntu trusty I must tell you that this problem could be due to the graphic card driver (nouveau).
I have tried this release with others PC and compiz works fine, so I think that my problem could be related with my graphic card (NVIDIA Corporation G72 [GeForce 7200 GS / 7300 SE] (rev a1)) 04:00.0 VGA compatible controller: NVIDIA Corporation G72 [GeForce 7200 GS / 7300 SE] (rev a1) (prog-if 00 [VGA controller]) Subsystem: ZOTAC International (MCO) Ltd. Device 5001 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, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 46 Region 0: Memory at fd000000 (32-bit, non-prefetchable) [size=16M] Region 1: Memory at d0000000 (64-bit, prefetchable) [size=256M] Region 3: Memory at fc000000 (64-bit, non-prefetchable) [size=16M] Expansion ROM at febe0000 [disabled] [size=128K] Capabilities: [60] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+ Address: 00000000fee0300c Data: 4152 Capabilities: [78] Express (v1) Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <1us, L1 <4us ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 512 bytes DevSta: CorrErr+ UncorrErr+ FatalErr- UnsuppReq+ AuxPwr- TransPend- LnkCap: Port #0, Speed 2.5GT/s, Width x16, ASPM L0s L1, Exit Latency L0s <1us, L1 <4us ClockPM- Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 128 bytes Disabled- CommClk- ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- Capabilities: [100 v1] Virtual Channel Caps: LPEVC=0 RefClk=100ns PATEntryBits=1 Arb: Fixed- WRR32- WRR64- WRR128- Ctrl: ArbSelect=Fixed Status: InProgress- VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans- Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256- Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=ff Status: NegoPending- InProgress- Capabilities: [128 v1] Power Budgeting <?> Kernel driver in use: nouveau Thanks for your help. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1294311 Title: Compiz process continuously uses too much cpu. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1294311/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs