Very bad OpenGL performance on i915

İsmail Dönmez ismail at
Tue Sep 27 05:11:32 PDT 2005


I installed latest xorg from cvs yesterday and loaded drm,dri,i915 etc but 
glxgears gives me only ~260 fps which seems to be really low for a card with 
a 128mb RAM.

Here is the lspci output :

0000:00:02.0 VGA compatible controller: Intel Corporation Mobile 
915GM/GMS/910GML Express Graphics Controller (rev 03) (prog-if 00 [VGA])
        Subsystem: Sony Corporation: Unknown device 81b8
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at b0080000 (32-bit, non-prefetchable)
        Region 1: I/O ports at 1800 [size=8]
        Region 2: Memory at c0000000 (32-bit, prefetchable) [size=256M]
        Region 3: Memory at b0040000 (32-bit, non-prefetchable) [size=256K]
        Capabilities: [d0] Power Management version 2
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

Any idea what might be wrong? Also I can't get screen to refresh > 60 Hz. Is 
that expected?


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