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
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[Intrepid] Intel graphics card only runs with NoDRI option
https://bugs.launchpad.net/bugs/277709
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