This isn't a "problem", but an xrandr solution for a
problem with gnome desktop preferences.
*** The problem:
gnome "system/preferences/Hardware/Displays" rotates
paired screens improperly.
*** The setup:
I have two ancient Planar 1910M monitors (1280x1024)
fed by a "two DVI port" video card. The left monitor
is rotated left, the right monitor is rotated right,
so the skinny "tops" of the screens are side by side.
*** The problem in detail:
When I use the gnome menu to rotate the displays, the
two patches of screen pixels are separated by a hidden
256-pixel-wide undisplayed strip. Dragging a window
between screens works, except that a strip in the
middle of the window is hidden.
*** The solution:
After duckducking the intertubes, I found some ideas,
which became a three line script (~/bin/twoscreen) run
by .bashrc after login:
-----------------------------------------------------------
#!/bin/bash
xrandr --output DVI-I-1 --rotate left --pos 0x0 \
--output DVI-I-2 --rotate right --right-of DVI-I-1
-----------------------------------------------------------
The important part is the "--right-of DVI-I-1" for screen two.
The gnome "video game" doesn't offer a way to do this.
Your screen names will vary;
xrandr | grep connected
... in an xterm will tell you what your screens are.
After rotating and joining, my screens are:
DVI-I-1 connected primary 1024x1280+0+0 left (normal left inverted right x axis
y axis) 380mm x 300mm
DVI-I-2 connected 1024x1280+1024+0 right (normal left inverted right x axis y
axis) 380mm x 300mm
Keith
P.S. Full Disclosure: I use the "mate" fork of gnome2.
Perhaps gnome3 joins screens automatically, but I avoid
it because of the Many Many Other Really STUPID Things
gnome3 does automatically, in the quest to turn a
production desktop into a handwaving video game for
knuckledragging morons. Useless for spastic seniors.
I can phrase that less diplomatically if requested, but
impressionable youths under 30 read this list. Don't
get me started on text (mis)rendering by Way(ste)land.
P.P.S. - get off my lawn.
--
Keith Lofstrom kei...@keithl.com
