Bug#797999: We are now more than one year later and this critical bug is not fixed

[Eric Valette <Eric.Valette@Free.fr>]

On 10/10/2016 01:43 PM, Maximiliano Curia wrote:
> ¡Hola Eric!
>
> El 2016-10-10 a las 13:22 +0200, Eric Valette escribió:
> > The same : a black screen with external monitor led going off. If I
> > press ctlr-alt-f1, led goes back up and I can login on console. I
> > switch back to kdm via dpkg-reconfigure and reboot.
>
> Interesting.
>
> > kdm knows how to proceed with external monitor when sddm does not.
> > Period. So its a bug that for me render sddm totally unusable.
>
> kdm and sddm are completely different beasts, but afaik neither have
> specific code for handling an external monitor. Also, this nagging about
> kdm is not productive, if you don't care about working on this issue,
> please switch to a different display manager.

When you say its a bug in the nvidia driver that is also counter 
productive and annoying for me because without external monitor, the 
same drivers, same version same everything  (except as said external 
monitor) works well with sddm on other laptop. I use kdm example just to 
say that the driver is not at fault. I just want to have sddm working 
but see no progress and on my side, there is not much I can do as I have 
no graphical environment at all as soon as I switch to sddm as a launcher.


> > xrandr  (once launched via kdm)
>
> > Screen 0: minimum 8 x 8, current 1920 x 1200, maximum 8192 x 8192
> > VGA-0 disconnected (normal left inverted right x axis y axis) 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 connected
> > (normal left inverted right x axis y axis)    1440x900      59.96 +
> > 39.96  DP-4 connected primary 1920x1200+0+0 (normal left inverted
> > right x axis y axis) 518mm x 324mm    1920x1200     59.95*+  59.88
> > 1920x1080     60.00    59.94    50.00    23.97    60.05    60.00
> > 50.04     1600x1200     60.00     1280x1024     75.02    60.02
> > 1280x720      60.00    59.94    50.00     1152x864      75.00
> > 1024x768      75.03    60.00     800x600       75.00    60.32
> > 720x576       50.00    50.08     720x480       59.94    60.05
> > 640x480       75.00    59.94    59.93
>
> It would be interesting to compare it with the xrandr report of a
> running sddm.

I cant' : I probably have no X session running. I have a black screen 
remember... Can try specifying display explicitly on console.

Can try to open the lid to see if anything is there but I doubt.

-- eric