problem with i830M interlaced VGA output (915G works fine)

[walter harms]

Thomas Hilber schrieb:
> On Mon, Oct 06, 2008 at 09:58:57AM -0700, Keith Packard wrote:
>> On Sun, 2008-10-05 at 09:21 +0200, Thomas Hilber wrote:
>>> Hi list,
>>>
>>> with the attached patch and xorg.conf I successfully use interlaced modes
>>> like 720x576i on a 915G chipset. For an i830M this unfortunately does not
>>> yet work completely. First of all thanks to Keith Packard and 
>>> Krzysztof Halasa for their basic PIPEACONF investigations posted here:
>> I845 and earlier chips (I didn't look at the i855 or i865) do not
>> support interlaced display at all.
> 
> but it's quite strange. Even my i810 is running in
> interlaced mode (i.e. 720x576i) with exactly the patch above with no
> problems at all.
> 
> OK, but if there is an 'interlace gap' between and including i830 - i865 then
> I will stop to find a solution for this issue.
> 
> anyway, thank you for your answer!
> 
>

can you produce a testcase ?
i have a notebook with i830m maybe we can use that program to test other chipsets also
and establish what chips a capable. Sometimes these features are simply undocumented.

re,
 wh