Bug#781150: Info received (Bug#781150: Acknowledgement (linux-image-3.16.0-4-amd64: Integrated Screen switches off when plugging in an external HDMI screen))

[Julien Wajsberg]

However:

* Signing off didn't work: nothing happens. (LIkely a Gnome issue)
* Switching to the VT, it's cloned on both screens.
* Restarting gdm3 with the HDMI cable still plugged in don't change
anything: Integrated Screen is off while External Screen is on, when in X.
* But restarting gdm3 with the HDMI cable off make the Integrated Screen
work again.

Bug#781150: Acknowledgement (linux-image-3.16.0-4-amd64: Integrated Screen switches off when plugging in an external HDMI screen)

[Julien Wajsberg]

Additional info:

I booted with the HDMI cable in: at the login session, both screens were
working. But as soon as I logged in to Gnome the integrated screen switched
off.

So maybe the Linux kernel is not the only culprit here.