I was an intel machine, and disconnecting the external video connection
caused a lot of devices to disappear and then reappear, including the
usb ports, the touchscreen, the webcam, and indeed the video card.
When the video card gets pulled out lots of things get upset and you end
up at a black screen. Switching to vt1 and back to 2 gets back to the
running session.
This smells more of a hardware issue than a bug. andyrock did some
debugging but we couldnt get to the bottom of it.
The user is also now reporting that the headphone socket has stopped working.
This makes me think it's even more likely to be a hardware issue.
I'll follow up again in the new year, but I don't think there is
anything else we can do here. Marking as invalid.
** Changed in: gnome-shell (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1806404
Title:
After the screen turns off the machine has to be rebooted to get back
to a working session
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