I have two screens on my computer, but they all show the same image (i.e I can’t activate dual screen).
I saw on some blogs that I need to configure xrandr for this, but it fails to do so. Here is the output xrandr returns:
<a href="https://getridbug.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="96e5f7fbd6d4d7c4d2c2a6a1a7">[email protected]</a>:~$ xrandr xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 1600 x 1200, maximum 1600 x 1200 default connected 1600x1200+0+0 0mm x 0mm 1600x1200 0.0* 1280x1024 0.0 1280x960 0.0 1024x768 0.0 800x600 0.0 640x480 0.0
It seems that only one screen is visible to my Debian system, even though I have two screens displaying something. Any pointers would be appreciated!
EDIT: I run xfce4, and going to Start -> Settings -> Display shows only one screen.
Answers:
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Method 1
You might want to take a look at this page, titled: XSF / How to use xrandr. For starters you could try this command:
$ xrandr --output VGA1 --right-of LVDS1
You can control the orientation of the monitors with respect to each other using these switches:
--right-of--left-of--above--below
Method 2
I had this problem, and it had nothing to do with xfce or debian, but of problem with radeon driver, I didn’t have some firmware, so I did this :
dpkg -i firmware-linux-nonfree_0.43_all.deb
Find the firmware here or here:
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0