Dual head on ATI FirePro M5800

[Alex Deucher]

On Wed, Oct 20, 2010 at 10:09 AM, Ole Tange <ole at tange.dk> wrote:
> On Tue, Oct 5, 2010 at 1:37 AM, Alex Deucher <alexdeucher at gmail.com> wrote:
>> On Mon, Oct 4, 2010 at 5:37 PM, Ole Tange <ole at tange.dk> wrote:
>>> I am trying to get dual head on ATI FirePro M5800 working. LVDS works,
>>> but VGA-0 is in power save mode no matter what I do.
>>>
>>> My colleague got the non-free driver working, but I would prefer using
>>> the free driver. My research seems to indicate the chipset is called
>>> Redwood or r8xx or RV830 or r800 or Evergreen - but I could be wrong.
>>>
>>> I have been unable to find a guide for this card and the obvious
>>> (xrandr --output LVDS --output VGA-0 --left-of LVDS) does not work.
>>> Neither does KDE's gui config of display.
>>>
>>> Below is some output that may help.
>>
>> If you are not already, your best bet is to use KMS.  Some evergreen
>> vbioses had a bug in the i2c table for the VGA port.  Make sure your
>> kernel has this patch:
>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ea39302b87b8d944d567ef29c0647c09da5743fa
>> or better yet, try 2.6.36.
>
> Now I have upgraded the Linux kernel to 2.6.36. I can now make the
> VGA-0 go from powersave to an odd shade of greenish gray if I use
> KDE's systemsettings to change the screen. I could not replicate that
> using xrandr, though.
>
> So it seems I am still stuck with one screen if I want to use the free driver.
>
> Ideas?

File a bug:
https://bugs.freedesktop.org

VGA works ok on the evergreen cards I have here.

Alex

>
>
> /Ole
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