Problems using 1920x1080 on a 965 with the Intel driver

[Adam Jackson]

On Thu, 2007-12-13 at 15:10 +0000, Simon Farnsworth wrote:
> Hello,
> 
> We're trying to drive a Samsung LE40M87BDX/XEU 1080p LCD TV with an
> Intel 965Q and the xf86-video-intel driver, on Fedora 8.
> 
> We've previously managed to make a 945 chip drive this display at 1080p,
>  using the i810 driver (version 1.6.0). Switching one of these machines
> to the intel driver (either git HEAD, or 2.1.1 as shipped with Fedora),
> or using the 965, causes the display to be unable to lock to the image.

It's not clear from your description whether you're trying to drive this
monitor with DVI or VGA.  I suspect DVI, in which case, the 965 log
shows something going wildly wrong in mode selection:

> (II) intel(0): SDVO device VID/DID: 04:AA.03, clock range 25.0MHz - 165.0MHz, input 1: Y, input 2: N, output 1: Y, output 2: N
> <...>
> (II) intel(0): EDID for output VGA
> <...>
> (II) intel(0): Modeline "1920x1080"x60.0  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync (67.2 kHz)

I can't think of a situation where that mode is ever valid.  I suspect
it's inherited from the extra modes list in Fedora; I'll check and patch
it out if so.  But if this is a DVI connection, then the 965 driver is
also getting confused, because the single-link-DVI bandwidth limit
should have clipped this mode away anyway.

- ajax
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