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Author Topic: [EN] Problems with 2nd monitor  (Read 3201 times)

Offline effo

  • User
  • Posts: 36
[EN] Problems with 2nd monitor
« on: 2015/11/22, 17:31:44 »
I am trying to add a second monitor to my system. I already have a Fujitsu P23T-6 1920x1080 and now I try to add a Philips Brilliande 200p LCD 1600x1200.
The system boots and use both displays, but the highest resolution available for the Philips monitor is 1024x768. I've tried to boot with only the Philips monitor attaches, but it still use only 1024x768.
Quote
/home/effo> xrandr
Screen 0: minimum 320 x 200, current 2944 x 1080, maximum 16384 x 16384
HDMI-0 disconnected (normal left inverted right x axis y axis)
VGA-0 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768      60.00* 
   800x600       60.32    56.25   
   848x480       60.00   
   640x480       59.94   
DVI-0 connected primary 1920x1080+1024+0 (normal left inverted right x axis y axis) 509mm x 286mm
   1920x1080     60.00*+
   1680x1050     59.88   
   1280x1024     75.02    60.02   
   1440x900      59.90   
   1024x768      75.08    60.00   
   800x600       75.00    60.32   
   640x480       75.00    60.00   
   720x400       70.08 

Quote
/home/effo> lspci | grep -i vga
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Trinity [Radeon HD 7660D]
/home/effo>
I believe the radeon driver is in use, as I see this in Xorg.0.log

Quote
[     4.697] (II) RADEON(0): Printing probed modes for output VGA-0
[     4.697] (II) RADEON(0): Modeline "1024x768"x60.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
[     4.697] (II) RADEON(0): Modeline "800x600"x60.3   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz e)
[     4.697] (II) RADEON(0): Modeline "800x600"x56.2   36.00  800 824 896 1024  600 601 603 625 +hsync +vsync (35.2 kHz e)
[     4.697] (II) RADEON(0): Modeline "848x480"x60.0   33.75  848 864 976 1088  480 486 494 517 +hsync +vsync (31.0 kHz e)
[     4.697] (II) RADEON(0): Modeline "640x480"x59.9   25.18  640 656 752 800  480 489 492 525 -hsync -vsync (31.5 kHz e)


Any ideas?

Offline musca

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  • Posts: 725
  • sid, fly high!
Re: Problems with 2nd monitor
« Reply #1 on: 2015/11/23, 22:13:05 »
Hello effo,

Quote
/home/effo> xrandr 
HDMI-0 disconnected (normal left inverted right x axis y axis)

You can try to connect your second display to your HDMI interface with a passive adaptor (hdmi to single-link DVI).
This will not work with dual-link DVI displays, though.

I found this nice matrix of possible combinations (german, "mit PA" means "with Passive Adaptor").

greetings
musca
β€žEs irrt der Mensch, solang er strebt.β€œ  (Goethe, Faust)

Offline effo

  • User
  • Posts: 36
Re: Problems with 2nd monitor
« Reply #2 on: 2015/11/24, 22:51:19 »
Thanks! A HDMI -> DVI cable did the trick!
Quote
/home/effo> xrandr -q
Screen 0: minimum 320 x 200, current 3520 x 1200, maximum 16384 x 16384
HDMI-0 connected 1600x1200+1920+0 (normal left inverted right x axis y axis) 408mm x 306mm
   1600x1200     60.00* 
   1280x1024     75.02    60.02   
   1152x864      75.00    69.97   
   1024x768      85.00    75.08    75.03    70.07    60.00   
   832x624       74.55   
   800x600       85.06    72.19    75.00    60.32    56.25   
   640x480       85.01    75.00    72.81    66.67    60.00   
   720x400       70.08   
VGA-0 disconnected (normal left inverted right x axis y axis)
DVI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 509mm x 286mm
   1920x1080     60.00*+
   1680x1050     59.88   
   1280x1024     75.02    60.02   
   1440x900      59.90   
   1024x768      75.08    60.00   
   800x600       75.00    60.32   
   640x480       75.00    60.00   
   720x400       70.08