Re: Intel graphics drm issue?

Mark Hounschell
2012-10-14T10:52:47Z

On 10/14/2012 04:41 AM, Bruno Prémont wrote:

>
> Your best solution is probably to write an EDID blob (or reuse one you find
> somewhere) that provides at least one mode matching your TV's native mode
> (probably full-HD).
>
> Google suggested the following document:
> http://www.jordansmanuals.com/ServiceManuals%5CLG%5CTV%5CLCD%5C42LB9DF%5C42LB9DF%20Service%20Manual.pdf
> which on page 13/14 shows the full EDID blob for the various HDMI outputs of the
> TV. You may want to read that document, convert the EDID blobs to 512 bytes binary
> files and hell DRM core to use the right one via module/kernel cmdline option:
>
> drm_kms_helper.edid_firmware=edid/lg42lb9df.edid
> or
> modprobe drm-kms-helper edid_firmware=edid/lg42lb9df.edid
>
> where
> /lib/firmware/edid/lg42lb9df.edid
> is the 512-bytes EDID blob created according to data from above manual.
> (note, that will only work for intel, radeon and nouveau drivers but will
> not work for closed drivers of AMD/nVidia)
>

This certainly looks doable. That firmware file, should it contain all 4
tables or just the one for the port I'm connected to? Will it matter what
order they were in?

Thanks
Mark