ati and 2 monitors with 2 different resolutions : is it possible ?

[Alex Deucher]

On Mon, Jan 5, 2009 at 3:45 PM, giggz <giggzounet at gmail.com> wrote:
> Alex Deucher a écrit :
>> On Mon, Jan 5, 2009 at 2:53 PM, giggz <giggzounet at gmail.com> wrote:
>>> Alex Deucher a écrit :
>>>> On Mon, Jan 5, 2009 at 1:42 PM, giggz <giggzounet at gmail.com> wrote:
>>>>> Hi,
>>>>>
>>>>> Happy new year!
>>>>>
>>>>> I have a question :
>>>>> on my laptop (debian sid), I have a second monitor on the VGA output.
>>>>>
>>>>> I don't have any problem on the VGA output when the monitor has the same
>>>>> display resolution (1400x1050) as the LVDS monitor.
>>>>> But when my second monitor has a lower resolution (1024x768), I can have
>>>>> a correct "clone" mode : on the second monitor I have a part of the
>>>>> "big" one (a rectangle 1024x768).
>>>>>
>>>>> Is there something to do ?
>>>> What exactly are you trying to do?  With clone mode you can have
>>>> either dis-similar modes on each head (1400x1050 on one, 1024x768 on
>>>> the other) or a common mode on both heads (e.g., 1024x768 on both).
>>>>
>>>> Alex
>>> Hi,
>>>
>>> I'm trying to have dis-similar modes on each head (1400x1050 on one,
>>> 1024x768 on the other) in clone mode...but it doesn't work.
>>>
>>> I have my main screen (LVDS) in 1400x1050 and my second (VGA) in
>>> 1024x768. But on the VGA one, I don't have my complete desktop, just a
>>> part of it (a rectangle, which its size is 1024x768 of the complete
>>> image (1400x1050)).
>>
>> It does work.  1024x768 is smaller than 1400x1050 so you won't be able
>> to see all of the larger screen on the smaller one.  As Rafal
>> suggested you could down-scale the image on avivo class hw (r5xx and
>> newer), but the ati driver doesn't currently support downscaling.
>> Pre-avivo chips (r1xx-r4xx) only support upscaling.
>>
>> Alex
>
> Ah ok.
>
> Thx for the explanation. And Can I use radeonhd driver for my radeon
> 9600 mobility ?

No, it's only supported by xf86-video-ati.  Plus since it's an r3xx
card, it only supports upscaling.

Alex