Re: Debian 8 on Late 2005 G5, Graphics Issues

[Clive Menzies <clive@clivemenzies.co.uk>]

On 07/02/16 17:45, Rick Thomas wrote:
> On Feb 7, 2016, at 6:49 AM, Clive Menzies <clive@clivemenzies.co.uk> wrote:
>
> > Upgrading to stretch from a fresh jessie install with 4.5.0-rc2 kernel installed worked fine. :-)
> >
> > xfce4 display settings is recognising both monitors but the second (which is different resolution to the mac screen) still won't come up. But at least the non-booting problem is solved.
> >
> > I'm going to mess around with xrandr to try to get dual head working.
> Hi Clive,   That's great to hear!
>
> Just out of curiosity, does the non-mac monitor work when it's the only one plugged in? I.e. remove the mac monitor and see what happens.
Hi Rick

It seems to be related to the DVI port; DVI-I-1 works but DVI-I-2 
doesn't. When I swap the monitors around it's the non-mac one which works.

$ xrandr
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 4096 x 4096
DVI-I-1 connected primary 1680x1050+0+0 (normal left inverted right x 
axis y axis) 433mm x 270mm
   1680x1050     59.88*+
DVI-I-2 connected 1280x1024+0+0 (normal left inverted right x axis y 
axis) 338mm x 270mm
   1280x1024     60.02*+
   1152x864      75.00
   1024x768      85.00    75.08    60.00
   832x624       74.55
   800x600       85.06    75.00    60.32
   640x480       85.01    75.00    60.00
   720x400       70.08

So xrandr sees both but no signal gets to DVI-I-2

I'm trying out various xrandr settings but I suspect it's something 
kernel related. Maybe there's a boot parameter that needs to be passed.

Regards

Clive

--
Clive Menzies
Political Economist
+44 (0) 7836 601378