Very bad OpenGL performance on i915

Anders Storsveen wakko at
Tue Sep 27 05:16:43 PDT 2005

İsmail Dönmez wrote:

>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?
>xorg mailing list
>xorg at
hehe, isn't that like saying, that 10mph is really low for a car with
6speed gearbox, when really, it has no wheels?

also, ram doesn't say much about performance.

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