Bug#538712: more info

[Alex Deucher]

On Wed, Jul 29, 2009 at 4:11 PM, Roderich
Schupp<roderich.schupp at googlemail.com> wrote:
> On Wed, Jul 29, 2009 at 9:17 AM, Alex Deucher<alexdeucher at gmail.com> wrote:
>> Does xf86-video-ati from git master work?  If it does I'll fix up the
>
> Yes, git master works. With this, xrandr shows
>
> Screen 0: minimum 320 x 200, current 2960 x 1050, maximum 3000 x 1050
> HDMI-0 connected 1680x1050+0+0 (normal left inverted right x axis y
> axis) 474mm x 296mm
>   1680x1050      59.9*+
>   1280x1024      75.0     60.0
>   1280x960       60.0
>   1152x864       75.0
>   1024x768       75.0     70.1     60.0
>   832x624        74.6
>   800x600        72.2     75.0     60.3     56.2
>   640x480        75.0     72.8     66.7     59.9
>   720x400        70.1
> VGA-0 disconnected (normal left inverted right x axis y axis)
> DVI-0 connected 1280x1024+1680+0 (normal left inverted right x axis y
> axis) 338mm x 270mm
>   1280x1024      60.0*+   75.0     60.0*
>   1600x1024      60.2
>   1400x1050      60.0
>   1440x900       59.9
>   1280x960       60.0
>   1360x768       59.8
>   1152x864       75.0     75.0     70.0     60.0
>   1024x768       75.0     70.1     60.0
>   832x624        74.6
>   800x600        72.2     75.0     70.0     60.3     56.2
>   640x480        75.0     72.8     75.0     66.7     59.9
>   720x400        70.1
>
>
> The interesting part is the "VGA-0 disconnected" line.
> With Debian 6.12.2-3 (where dual screen didn't work), VGA-0 was shown
> as connected,
> while withe Debian 6.12.2-2 (dual screen working) there was no VGA-0 at all.

The problem is that some board vendors combine digital and analog
encoder as a single DVI-I and others leave them as separate HDMI and
VGA ports, however they share the same DDC line and show up the same
way in the bios tables.  If we exposed them as a single DVI-I or
HDMI+VGA, it would be confusing to some set of users.  Depending on
how prevalent each type is, it may make sense to quirk one or the
other.

Alex