Ubuntu
xserver-xorg-video-intel package

  1. Bug #1552040
  2. Comment #15

Comment 15 for bug 1552040

Revision history for this message
Martin Dünkelmann (nc-duenkekl3-deactivatedaccount) wrote : Re: Laptop sometimes doesn't detect external monitor

ThinkPad T460p
Ubuntu 18.04 / Linux Mint 19
uname -a Linux deus-ex-machina 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 18:02:16 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Mate Desktop

Same problem.
If I boot with the dock, everything is fine.
If I unplug and plug it again, my external monitors are still black and my internal keyboad and the USB are not working.
But I get the message, that the ethernet cable is connected and that the laptop gets power.

I also tested https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1552040/comments/14 from Sergey Menshikov (sergem)
After adding /usr/share/X11/xorg.conf.d/20-intel.conf my computer was unusable, stopping at the bootscreen, with the message
PKCS#7 signature not signed with a trusted key
Secure Boot is deactivated.