Created attachment 15477 [details]
logfile of me trying to start mplayer on diffrent screens.

Opening a movie file in mplayer using Xv everything works well until I drag the windows partly or fully to the right screen. The part of the window on the right screen is just blue.
Same behavor if I start mplayer on the right screen. Only the part on the left screen shows moving pictures.

01:00.0 VGA compatible controller [0300]: nVidia Corporation NV31 [GeForce FX 5600] [10de:0312] (rev a1) (prog-if 00 [VGA controller])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 32 (1250ns min, 250ns max)
	Interrupt: pin A routed to IRQ 18
	Region 0: Memory at f8000000 (32-bit, non-prefetchable) [size=16M]
	Region 1: Memory at e0000000 (32-bit, prefetchable) [size=256M]
	[virtual] Expansion ROM at f9000000 [disabled] [size=128K]
	Capabilities: [60] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [44] AGP version 3.0
		Status: RQ=32 Iso- ArqSz=0 Cal=3 SBA+ ITACoh- GART64- HTrans- 64bit- FW+ AGP3+ Rate=x4,x8
		Command: RQ=32 ArqSz=2 Cal=0 SBA+ AGP+ GART64- 64bit- FW+ Rate=x8