mjhjmtu

I'm having a problem with my system for some time. I've been hitting this problem for some time. I looked for people with a problem similar to mine but found none. I use 3 monitors in portrait mode 24" each(1920x1080;1920x1200;1920x1080).

What I want What I have 
+------++--------++------+ +------+ +--------+ +------+
| || || | | | | | | |
| || || | | | | | | | 
| 1 || 2 || 3 | | 1 | | 2 | | 3 | 
| || || | | | | | | | 
| || || | | | | | | | 
+------++--------++------+ +------+ +--------+ +------+ 

I keep on getting a weird virtual gap between them and I can lose icons and opened window apps there. I have a GTX1080Ti for GPU and My DE: MATE 1.18.2.. I want to have the gap gone like the monitors are really close to each other, I would like the reverse action of this post Stretch window over two monitors with "gap" in between . I think something might be done with xrandr here but I just can't figure it out, here is my config:

Screen 0: minimum 8 x 8, current 4920 x 1920, maximum 32767 x 32767
DVI-D-0 connected primary 1200x1920+1920+0 left (normal left inverted right x axis y axis) 519mm x 324mm
 1920x1200 59.95*+
 1680x1050 59.95 
 1600x1200 60.00 
 1280x1024 75.02 60.02 
 1152x864 75.00 
 1024x768 75.03 60.00 
 800x600 75.00 60.32 
 640x480 75.00 59.94 
HDMI-0 connected 1080x1920+0+0 left (normal left inverted right x axis y axis) 531mm x 299mm
 1920x1080 60.00*+
 1680x1050 59.95 
 1440x900 59.89 
 1280x1024 75.02 60.02 
 1280x960 60.00 
 1280x800 59.81 
 1280x720 60.00 
 1152x864 75.00 
 1024x768 75.03 70.07 60.00 
 800x600 75.00 72.19 60.32 56.25 
 640x480 75.00 72.81 59.94 
HDMI-1 connected 1080x1920+3840+0 right (normal left inverted right x axis y axis) 368mm x 207mm
 1920x1080 60.00*+
 1680x1050 59.95 
 1600x900 60.00 
 1400x1050 59.98 
 1280x1024 75.02 60.02 
 1280x960 60.00 
 1280x800 59.81 
 1280x720 60.00 
 1152x864 60.00 
 1024x768 75.03 70.07 60.00 
 800x600 75.00 72.19 60.32 56.25 
 640x480 75.00 72.81 59.94 
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)

1920 is the width in landscape mode, so becomes the height in portrait mode. Your config starts each monitor 1920 pixels from the start of the last monitor, so there's a 700-900 pixel gap between them:

+0 +1920 +3840
+------+ +--------+ +------+ total: 4920w x 1920h
| | | | | |
|1080w | |1200w | |1080w | 
| 1 | | 2 | | 3 | 
| | | | | | 
+------+ +--------+ +------+ 
 | | | |
 840 gaps 720

The overall geometry is in the xrandr output. Notice the starting X positions are multiples of 1920 -- you'd expect that in landscape mode, but not in portrait where the widths are smaller:

Screen 0: minimum 8 x 8, current 4920 x 1920 [<== total]
DVI-D-0 connected primary 1200x1920+1920+0 left [<== WidthxHeight+StartX+StartY]
 ...
HDMI-0 connected 1080x1920+0+0 left [<== WidthxHeight+StartX+StartY]
 ...
HDMI-1 connected 1080x1920+3840+0 right [<== WidthxHeight+StartX+StartY]
 ...

What you want:

+0 +1080 +2280
+------++--------++------+ total: 3360w x 1920h
| || || |
|1080w ||1200w ||1080w | 
| 1 || 2 || 3 | 
| || || | 
+------++--------++------+ 

You don't provide an exact xrandr command that you use to achieve what you have, but I think this will get what you want (I'm not certain about the rotations; they're from your xrandr output):

xrandr --output HDMI-0 --rotate left --pos 0x0 
 --output DVI-D-0 --rotate left --right-of HDMI-0 
 --output HDMI-1 --rotate right --right-of DVI-D-0