[GTALUG] Kernel and/or X upgrade broke my video setup

[ac]

On Wed, 11 Oct 2017 10:01:07 -0400
Scott Sullivan via talk <talk at gtalug.org> wrote:
> 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.
> 
yep, for good reason...

if the screen config is screwed, then very probably other configs are
similarly screwed... 

imho, better to reset to defaults 

and then see what needs changing...

> >> 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.
> 
Okay, but after a kernel update / distro update - no configs 'should
have' been over written... 

as it seems there has been config changes (both screens are still
working & mouse moves to both screens, etc etc)

> 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.
> 
cool & good to know :)

> 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.
>