Arch Linux

megabeaver

Member

From: Canada

Registered: 2012-12-10

Posts: 17

Triple head with HP Pavilion dv6

Hi,

I have a HP pavilion dv6 laptop with 2 video cards [Intel and Radeon] that I would like to connect to 2 external monitors.
The problem is that they seem to work separately, but not both at the same time. One is connected to VGA and the other one to HDMI ports of the laptop.

$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series]

xrandr output is fine:

$ xrandr
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 32767 x 32767
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
   1366x768       60.0*+
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 connected (normal left inverted right x axis y axis)
   1920x1080      60.0 +
   1680x1050      60.0  
   1280x1024      75.0     60.0  
   1440x900       75.0     59.9  
   1280x960       60.0  
   1152x864       75.0  
   1280x720       60.0  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1  
HDMI1 connected (normal left inverted right x axis y axis)
   1920x1200      60.0 +
   1600x1200      60.0  
   1280x1024      75.0     60.0  
   1280x960       60.0  
   1152x864       75.0  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1  
DP1 disconnected (normal left inverted right x axis y axis)

$ xrandr --auto
xrandr: cannot find crtc for output HDMI1

$ xrandr --output VGA1 --auto 
$ xrandr --output HDMI1 --auto 
xrandr: cannot find crtc for output HDMI1

same goes if connected in the opposite order:

$ xrandr --output HDMI1 --auto 
$ xrandr --output VGA1 --auto 
xrandr: cannot find crtc for output VGA1

is it possible to have them both work at the same time without a docking station?

Thank you