Intel Q35/Q45 fb driver?

McDonald, Michael-p7438c Michael.McDonald at
Wed Oct 7 18:40:27 PDT 2009

> -----Original Message-----
> From: xorg-bounces at 
> [mailto:xorg-bounces at] On Behalf Of 
> McDonald, Michael-p7438c
> Sent: Wednesday, October 07, 2009 10:37 AM
> To: Adam Jackson
> Cc: xorg at
> Subject: RE: Intel Q35/Q45 fb driver?

> Being able to mmap the frame buffer directly reduces it to 1 copy
> (XShmPutImage):
> shared memory -> frame buffer
> Modifying MITSHM to use mmap also reduces it to 1 copy as we can then
> mmap our shared memory regions directly into the X server. This is
> probably what we'll end up doing (it's implemented and just 
> waiting for
> testing). 

We have the mmap version of the MIT SHM extension working and we now get
18-21 frames/sec whereas we were getting just 2-3 frames/sec using stock

X still seems kind of overkill when all we need is a frame buffer and a

Mike McDonald

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