video cables: 2 out of 3 ain't bad

[Stephen]

That should be able to run dual digital displays. But it may require the
mad driver to do it. It should be a shared ramdac and gpu. So unless the
did something weird on port it should work with the right driver in play.

On Monday, November 4, 2013, der.hans wrote:

> Am 04. Nov, 2013 schwätzte Mike Bushroe so:
>
> moin moin,
>
>   because there is so much difference in how they implement VGA (limited
>> resolution, analog out, sync pulses, etc) and digital they many "dual
>> head"
>> display drivers have one of each to make sure that what ever type of
>> display you have, they can drive at least one. So I fear that you quest
>> for
>> 2 digital displays is likely to fail, or require new hardware, not just
>> new
>> software.
>>
>
> Ah, so one chip for digital that can feed one display and another chip for
> analog. Kinda what I was figuring.
>
>  What are you using for video? X? You might need Xinerama to get full use
>> of
>> both screens.
>>
>
> I would prefer to use xrandr. Besides, Xinerama is so 2000's :).
>
> In either case, I still think it needs to be able to drive that much
> display. Not sure why the proprietary driver can and the Free Software
> driver can't.
>
> 01:05.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI
> RS780L [Radeon HD 3000] (prog-if 00 [VGA controller])
>         Subsystem: Micro-Star International Co., Ltd. Device 7501
>         Flags: bus master, fast devsel, latency 0, IRQ 18
>         Memory at d0000000 (32-bit, prefetchable) [size=256M]
>         I/O ports at c000 [size=256]
>         Memory at fe8f0000 (32-bit, non-prefetchable) [size=64K]
>         Memory at fe700000 (32-bit, non-prefetchable) [size=1M]
>         Expansion ROM at <unassigned> [disabled]
>         Capabilities: <access denied>
>
> ciao,
>
> der.hans
>
>  Mike
>>
>>
>>  moin moin,
>>>
>>> It looks like I can get 2 out of 3 as long as the two aren't HDMI and DVI
>>> :(. With cables plugged into both ports I can't even see post. Remove one
>>> and suddenly lights are on.
>>>
>>> Using either HDMI or DVI with VGA works, though.
>>>
>>> Now I just need to figure out why wheezy demands on cloning the output.
>>>
>>> I'm hoping to find a solution that doesn't require installing the
>>> proprietary driver :).
>>>
>>> ciao,
>>>
>>> der.hans
>>>
>>> --
>>>
>> "Creativity is intelligence having fun." — Albert Einstein
>>
>>
> --
> #  http://www.LuftHans.com/        http://www.LuftHans.com/Classes/
> #  "It is a miracle that curiosity survives formal education."
> #   -- Albert Einstein



-- 
A mouse trap, placed on top of your alarm clock, will prevent you from
rolling over and going back to sleep after you hit the snooze button.

Stephen
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