I have the same problem on a HP desktop computer with integrated graphics and DVI add-on card. NoDRI works.
00:02.0 VGA compatible controller: Intel Corporation 82865G Integrated Graphics Controller (rev 02) Subsystem: Hewlett-Packard Company Device 12bc 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 f0000000 (32-bit, prefetchable) [size=128M] Region 1: Memory at f8400000 (32-bit, non-prefetchable) [size=512K] Region 2: I/O ports at 14e0 [size=8] Capabilities: [d0] Power Management version 1 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Kernel modules: intelfb -- [Intrepid] Intel graphics card only runs with NoDRI option https://bugs.launchpad.net/bugs/277709 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs