Fwd: xf86-video-i810-1.9.92 works on external 1920x1200 but not 1400x1050 laptop screen...

Keith Packard keithp at keithp.com
Wed Mar 28 08:52:04 PDT 2007

On Wed, 2007-03-28 at 23:30 +0800, JM Ibanez wrote:

> Just curious: can't the driver simply use the hardware to "pan" across
> the actual screen with a window/viewport 2048 pixels wide? I mean, can't
> the driver trick the hardware into addressing 2048 pixels at a time, at
> least for DRI and XV acceleration.

Nope, it can't set the stride to more than 8192 bytes, so it's more
limited than the Radeon chips.

> Or, alternatively, can't the driver tell the hardware to accelerate (DRI
> and XV) just one output and not the other?

Right now, the driver allocates a single frame buffer for all outputs
and places the outputs within that area. Splitting it so that each
output had its own frame buffer will make it possible for each output to
reach up to 2048x2048 pixels, that's what I was suggesting needed to be

keith.packard at intel.com
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