On 11/10/17 09:10 AM, ac via talk wrote:
> Hi Evan :)
>
> i did not bite as I am not that knowledgable on kde... but as nobody
> is saying anything maybe try:
> mv /home/scott/.config /home/scott/oldconfig
>
> let us know?
That's a very broad approach with the disadvantage of moving settings
for a whole lot of unrelated applications.
> Evan Leibovitch via talk <talk(a)gtalug.org> wrote:
>>
>> What's stranger (to me) is that when logged out (running LightDM) the
>> system DOES recognize my mouse pointer going from one screen to the
>> next. So somewhere it IS being recognized as a separate screen, but
>> once I log in that goes away and I'm back to a mirroring situation..
xrandr is command line too for handling multi-monitor arrangements.
Desktop implement UIs that talk to this functionality, and handle the
'memory' of layouts. KDE's for example will remember transient moinitor
configureations, like my two different laptop docks at home and work,
and will restore the right layout for each, matching against the Vendor
IDs of the monitors.
The X Rotation and Reflection extensions are how multi-monitor modes are
handled. In current times, functionally X has one giant display buffer,
and monitors are small cutouts of that, arranged relative to each other.
This is the output of my currently 'mirrored' two outputs.
scott  ~  xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis
y axis) 256mm x 144mm
1920x1080 59.99*+
1400x1050 59.98
1280x1024 60.02
1280x960 60.00
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
800x600 60.00 60.32 56.25
700x525 59.98
640x512 60.02
640x480 60.00 59.94
512x384 60.00
400x300 60.32 56.34
320x240 60.05
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 connected 1920x1080+0+0 (normal left inverted right x axis y
axis) 477mm x 268mm
1920x1080 60.00*+ 59.94
1680x1050 59.88
1400x1050 59.95
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.90
1280x800 59.91
1152x864 75.00
1280x720 60.00 59.94
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
It shows the available outputs, and any that have monitor detected, will
have their supported Resolutions and refresh rates shown. The '+' is the
recommended resolution reported by the hardware, and the
*' is the currently operating resolution and refresh rate.
An example invocation. Which turns off all but my laptops primary
display. Note the missing '*' in the HDMI-2 resolution section.
xrandr --output eDP1 --auto --primary --rotate normal --output HDMI-1
--off --output HDMI-2 --off
 scott  ~  xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
eDP-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis)
256mm x 144mm
1920x1080 59.99*+
1400x1050 59.98
1280x1024 60.02
1280x960 60.00
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
800x600 60.00 60.32 56.25
700x525 59.98
640x512 60.02
640x480 60.00 59.94
512x384 60.00
400x300 60.32 56.34
320x240 60.05
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 connected (normal left inverted right x axis y axis)
1920x1080 60.00 + 59.94
1680x1050 59.88
1400x1050 59.95
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.90
1280x800 59.91
1152x864 75.00
1280x720 60.00 59.94
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
I'm not familiar with what GUI application LightDM to manipulate xrandr,
but with some research you can figure that out, and set your preferred.
I had to do a lot of work with this stuff when I worked at the VFX
studio. Let's just say there were some painful combinations of hardware,
binary Nvidia drives and artists insisting on Vertical monitors.
--
Scott Sullivan
