Wrong DDC information for external monitor with i810

[Barry Scott]

Christoph Burghardt wrote:
>> Only thing you can do for now is disable DDC, with Option "NoDDC".
>>
>>     
>
> I've tried that too. I've created a modeline now with
>
> Section Monitor
>         Identifier      "TV"
>         Option          "DPMS"
>         Mode            "1280x768"
>                         DotClock        81
>                         HTimings        1280 1368 1440 1688
>                         VTimings        768 769 772 800
>         EndMode
>         ModeLine        "1280x768"       80.14   1280 1368 1440 1688   768 769 772 800
> EndSection
>
> and all i get is a 640x480 resolution and the warning
>
> (II) I810(0): Not using mode "1280x768" (no mode of this name)
>
> I even tried this with a special modes section and a UseModes, but it
> still ignores the modelines. Googling around brings up many sites and
> all advice, to use 915resolution (which i did, mode 5c is patched to
> 1280x768) Any ideas?
>
> Thanks in advance,
>
>   
If you try hard enough you can get the i810 driver to notice a 1280x768 mode
that you setup with 915resolution. But the refresh rate will be wrong so the
display will not lock. What I found was that X thinks the refresh rate 
is 60Hz
but the signal was really 52Hz.

You have to use the intel driver's modesetting branch from GIT  to allow
1280x768 mode to be used.

Barry