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Re: two graphics cards and two monitors



On Friday,  3 Nov 2017 at 11:19, Don Armstrong wrote:
> On Fri, 03 Nov 2017, Eric S Fraga wrote:
>> I am trying to get a similar system configure with Debian testing/buster
>> and not getting anywhere beyond having two monitors on a single card
>
>> recognised.  I have three monitors, two on first card and 1 on second
>> card.  Only the ones of the first card are getting managed by
>> Xorg.  Although the second card and associated monitor are found by
>> Xorg, I cannot seem to get Xorg to configure and actually use this third
>> monitor.
>
> What does the output of xrandr; look like?

Thanks for your response.  Sorry for delay in getting back to you but I
was away on business trip.

$ xrandr
Screen 0: minimum 320 x 200, current 5760 x 1600, maximum 16384 x 16384
DVI-I-1 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
   1920x1200     59.95*+
   1920x1080     60.00  
   1600x1200     60.00  
   1680x1050     59.88  
   1280x1024     60.02  
   1280x960      60.00  
   1024x768      60.00  
   800x600       60.32  
   640x480       59.94  
   720x400       70.08  
DP-1 connected 3840x1600+1920+0 (normal left inverted right x axis y axis) 880mm x 367mm
   3840x1600     59.99*+
   2560x1440     59.95  
   1920x1600     59.95  
   2560x1080     59.98  
   1920x1080     60.00    50.00    59.94  
   1920x1080i    60.00    50.00    59.94  
   1600x1200     60.00  
   1280x1024     75.02    60.02  
   1280x800      59.81  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x576i      50.00  
   720x480       60.00    59.94  
   720x480i      60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08  

> What happens if you run xrandr --output DVI-I-1-2 --auto; ?

$ xrandr --output DVI-I-1-2 --auto
warning: output DVI-I-1-2 not found; ignoring

>> I can post Xorg.0.log as well as my current xorg.conf if anybody is
>> interested. Without an xorg-conf at all, I get the same effective
>> behaviour: two monitors working but third one ignored.
>
> Also, is there any reason why you're defining a monitor section in your
> xorg.conf? [If your displays are just rotated, you'd be better off
> issuing xrandr commands to run the rotation immediately upon login or
> similar, IMO. Or using autorandr or similar.]

Yes, but without it (and with it as well but I was hoping...), the extra
monitor is not found at all.

thanks,
eric

-- 
: Eric S Fraga
: in Emacs 27.0.50 + Gnus v5.13 + evil-git-5d040cd
: BBDB version 3.1.2 (2017-01-30 14:47:26+00:00)

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