Bug#420611: xserver-xorg-core: Composite extension not available?

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

Adam Spragg wrote:
> With or without an "Option Composite Enable" line in my xorg.conf,
> Xorg.0.log claims that the Composite extension is initialized. At least,
> no errors are reported.
>   

My Xorg.log claims that it is enabled:
(**) Extension "Composite" is enabled

I guess "initialized" is different from "enabled"...

> 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS/940GML Express Integrated Graphics Controller (rev 03)
>
> Section "Extensions"
> 	Option "Composite" "Enable"
> EndSection
>   

I have the same board and composite config in my xorg.conf, it works fine.

> (WW) intel(0): Register 0x61200 (PP_STATUS) changed from 0xc0000008 to 0xd0000009
> (WW) intel(0): PP_STATUS before: on, ready, sequencing idle
> (WW) intel(0): PP_STATUS after: on, ready, sequencing on
> [...]
> (WW) intel(0): xf86AllocateGARTMemory: allocation of 10 pages failed
> 	(Cannot allocate memory)
> [...]
> (II) intel(0): [drm] removed 1 reserved context for kernel
> (II) intel(0): [drm] unmapping 8192 bytes of SAREA 0xe0849000 at 0xb7be6000
> (EE) intel(0): I830 Vblank Pipe Setup Failed 0
> [...]
> (WW) intel(0): xf86AllocateGARTMemory: allocation of 10 pages failed
> 	(Cannot allocate memory)
>   

That's a couple interesting warnings that we have seen in other bugs as
well.
But it's not clear why Composite would not be enabled.
Does Direct Rendering even work? (according to glxinfo)

Brice