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Old 12-09-2012, 10:45 AM   #1
silvanm
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Registered: Sep 2012
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Mini DisplayPort Debian Wheezy


Hello

I have a problem with my new laptop: I'd like to connect a VGA-monitor to my mini display port with an adapter. But it doesn't work. Here are some details:

OS: Debian wheezy (testing) with gnome-shell 3.4.2

Graphics: nVidia with Optimus, but no driver installed yet. So working with onboard-chip Intel Ivybridge Mobile and driver i915

/var/log/Xorg.0.log after connecting adapter with/without Display:
Code:
[   964.762] (II) PM Event received: Capability Changed
[   964.762] I830PMEvent: Capability change
[   964.817] (II) intel(0): EDID vendor "AUO", prod id 237
[   964.817] (II) intel(0): Printing DDC gathered Modelines:
[   964.817] (II) intel(0): Modeline "1920x1080"x0.0  136.20  1920 1968 2068 2086  1080 1083 1084 1088 +hsync -vsync (65.3 kHz eP)
[   964.817] (II) intel(0): Modeline "1920x1080"x0.0   90.80  1920 1968 2068 2086  1080 1083 1084 1088 +hsync -vsync (43.5 kHz e)
--> highest resolution for my external monitor is 1280x1024

xrandr-output after connection adapter with/without Display:
Code:
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
LVDS1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
   1920x1080      60.0*+   59.9     40.0  
   1680x1050      60.0     59.9  
   1600x1024      60.2  
   1400x1050      60.0  
   1280x1024      60.0  
   1440x900       59.9  
   1280x960       60.0  
   1360x768       59.8     60.0  
   1152x864       60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
No messages in /var/log/messages

Does anybody have an idea what's wrong? Because if I connect a monitor via HDMI, it works.

Thanks for your help

Silvan

Last edited by silvanm; 12-09-2012 at 12:17 PM.
 
Old 12-16-2012, 12:23 PM   #2
silvanm
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Registered: Sep 2012
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Really no ideas? I would appreciate any help.

Here are some new information:

1. I tried to force the mini DisplayPort to output a signal with xrandr:

Code:
xrandr --addmode DP1 800x600
xrandr --output DP1 --mode 800x600 --right-to LVDS1
but after this commands turned my laptop screen off and there was still nothing on my external monitor.

2. I compiled the new 3.6.10 kernel, but still no success.

Thanks for your ideas
 
Old 12-19-2012, 06:35 AM   #3
TobiSGD
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I would recommend to install the Nvdida driver and try it again. I heard from cases where HDMI/DP output was connected directly to the Nvidia chip.
 
Old 12-19-2012, 04:38 PM   #4
silvanm
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Registered: Sep 2012
Posts: 5

Original Poster
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Thanks for your reply! But I thought the idea of the new nVidia Optimus technology is that the GPU calculates the complex calculations and sends back the results to the onboard-chip (intel), which compines the results with the not so complex calculations. So the output should always be at the onboard-chip if the optimus technology is used.

Are there any other ideas?
 
  


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