14 of 14 people found the following review helpful
Good switch but caution for ubuntu users,
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This review is from: VGA Manual Monitor Switch Box Splitter 2 Port Way (Electronics)
Does exactly what it say on the tin,
I have my laptop and desktop using a single monitor through this switch and it works very well. I initially had problems with ghosting but after buying high quality cables it disappeared.
One note of caution I use Ubuntu Linux in addition to XP on my desktop and as this switch does not transmit monitor Id's Ubuntu is not displayed properly because it can not detect monitors resolution. Works well with windows7 and XP however as you can manually set screen resolutions.
Overall a good cheap solution but be careful if using Ubuntu/Linux
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Showing 1-2 of 2 posts in this discussion
Initial post: 17 Nov 2013 14:48:37 GMT
N. Masse says:
You can make it work with Ubuntu.
Step 1: Do this when connected to your monitor directly
$ xrandr -q
Output is like this:
Screen 0: minimum 320 x 200, current 1360 x 768, maximum 8192 x 8192
VGA1 connected 1360x768+0+0 (normal left inverted right x axis y axis) 304mm x 228mm
1024x768 75.1 70.1 60.0
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 60.0
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 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)
Step 2: Do this when connected to your monitor directly. The first digit is width, second is height, third is frequency in Hz. You use the values your monitor currently uses, as per output of step 1 ("VGA1 connected 1360x768" gives me width/height and "1360x768 59.7*+" gives me frequency, rounded up)
$ cvt 1360 768 60
Output is like this:
# 1360x768 59.80 Hz (CVT) hsync: 47.72 kHz; pclk: 84.75 MHz
Modeline "1360x768_60.00" 84.75 1360 1432 1568 1776 768 771 781 798 -hsync +vsync
Step 3: Do this when connected to the switch box. Everything after "--newmode" is a copy and paste from second line of output of step 2, removing Modeline.
$ xrandr --newmode "1360x768_60.00" 84.75 1360 1432 1568 1776 768 771 781 798 -hsync +vsync
Step 4: Do this when connected to the switch box. This will cause your monitor to go blank for a couple of seconds, while it is being reset to the new resolution
xrandr --addmode VGA1 1360x768_60.00
Steps 1 and 2 need to be done only once, so you know the correct resolution of your monitor. Steps 3 and 4 needs to be done at each boot up, or you can add them to your start up profile (test them first so you are sure it works obviously).
In reply to an earlier post on 17 Jan 2015 23:07:23 GMT
Guy Hamble says:
How does one do this to work with dual monitors? Will it work just to unplug one from the video card while playing about with the one you want to use in the VGA splitter?
Thanks though, really helpful.
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