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Enabling Dual Monitor Support?
Posted: 08 Dec 2015, 19:24
by Krahazik
I have Porteus installed to the HDD of my netbook which has a VGA port for displaying on a 2nd monitor.
I am unable to find the video control panel or controls for setting resolution, enabling dual monitors, extended desktop, etc.
Is there a way to set Porteus to automatically detect when a monitor is plugged into the VGA port and extend the desktop to the 2nd monitor?
Re: Enabling Dual Monitor Support?
Posted: 08 Dec 2015, 20:13
by beny
if you have the nvidia driver is simple via nvidia-setting for other video driver i think you need xrandr ,but i am not skilled on this.
Re: Enabling Dual Monitor Support?
Posted: 09 Dec 2015, 02:05
by francois
Telling us which desktop you use would help. Usually kde should find it automatically. For the other desktop please provide the output of xrandr command while your second display is plugged to your linux box. For example, mine is:
Code: Select all
root@porteus:/mnt# xrandr
Screen 0: minimum 320 x 200, current 3286 x 1080, maximum 32767 x 32767
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 353mm x 198mm
1366x768 60.0*+
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 477mm x 268mm
1920x1080 60.0*+
1680x1050 60.0
1600x900 60.0
1280x1024 75.0 60.0
1280x960 60.0
1152x864 75.0
1280x720 60.0
1152x720 60.0
1024x768 75.1 60.0
832x624 74.6
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
root@porteus:/mnt#
You will need a script resembling mine, but built according to your screen setup. My benq.sh script is:
Code: Select all
xrandr --output LVDS1 --mode 1366x768 --output VGA1 --mode 1920x1080 --right-of LVDS1
Then you could put the script or the equivalent command line into the autostart folder. What is your desktop type and what is the output of xrandr?
Re: Enabling Dual Monitor Support?
Posted: 10 Dec 2015, 18:00
by Krahazik
When I rebooted the netbook it started using the 2nd display.
I am using the LXDe environment.
The netbook has an intel video chipset.
Code: Select all
guest@porteus:~$ xrandr
Screen 0: minimum 320 x 200, current 1360 x 1368, maximum 32767 x 32767
LVDS1 connected primary 1024x600+0+768 (normal left inverted right x axis y axis) 222mm x 125mm
1024x600 60.0*+
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1360x768+0+0 (normal left inverted right x axis y axis) 16mm x 9mm
1360x768 60.0*+
1280x768 60.0
1024x768 60.0
800x600 60.3
640x480 60.0
I created a new shell script (ending in .sh) using the above mentioned code adjusted for my setup.
Would this be correct? Set the file to executable?
Code: Select all
xrandr --output LVDS1 --mode 1024x600 --output VGA1 --mode 1360x760 --above-of LVDS1
If I set the height on my netbook's screen (LVDS1) to 768 instead of 600 (native), could that force the display to that height?
The native resolution of 1024x600 is a bit of an oddball resolution and has caused occasional issues with windows extending a hair below the edge of my screen hiding buttons.
Re: Enabling Dual Monitor Support?
Posted: 10 Dec 2015, 18:12
by francois
So you understood that you have to plug the second display before booting into porteus.
I understand that your problem is solved?
There is no lxde edition for porteus actually, only lxqt. Please confirm the typo error.
In the event that you would like to set your second display, here is the command line you could use to set the second display to 1280x768, choosen amongst the possible settings provided by your xrandr output, just try it:
Code: Select all
xrandr --output LVDS1 --mode 1024x600 --output VGA1 --mode 1280x768 --right-of LVDS1
For the maximum resolution 1360x768, it would be:
Code: Select all
xrandr --output LVDS1 --mode 1024x600 --output VGA1 --mode 1360x768 --right-of LVDS1
Turn them into a script.