Bug#976235: enlightenment: e switches off screen|monitor

[Ross Vandegrift]

On Mon, Dec 07, 2020 at 12:43:35AM +0100, enno wrote:
> >>>>> "Ross" == Ross Vandegrift <rvandegrift at debian.org> writes:
>     > [...] - it might be useful to run `xrandr` in
>     > flwm and a bare X session to compare with E's output regarding
>     > your displays.
> 
> xrandr on flwm and on pure X diff -q 0:
> LVDS connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
>    1600x900      59.90*+  39.93
>    1440x900      59.99
>    1280x854      59.95
>    1280x800      59.96
>    1280x720      59.97
>    1152x768      59.95
>    1024x768      59.95
>    800x600       59.96
>    848x480       59.94
>    720x480       59.94
>    640x480       59.94
> DisplayPort-0 disconnected (normal left inverted right x axis y axis)
> DisplayPort-1 disconnected (normal left inverted right x axis y axis)
> DisplayPort-2 disconnected (normal left inverted right x axis y axis)
> VGA-0 disconnected (normal left inverted right x axis y axis)
> 
> So all three cases use LVDS and know the precise measurements of my display,
> just e seems to need something additional which alas is not in the dependency
> list i suppose.

Well, not quite - this output shows that X knows the measurements of your LVDS
display, ie, your laptop's built-in panel.  The external screen are not
detected - that confirms this is not a problem in E.

Since X doesn't detect a display connected to the other outputs, E is disabling
them.  I bet flwm doesn't have any knowledge of xrandr, and just runs on any X
display it finds.

I don't know why the connection would be misreported - probably a bug in the
video driver.

Ross