Ubuntu
xserver-xorg-video-intel package

  1. Bug #1263681
  2. Comment #20

Comment 20 for bug 1263681

Revision history for this message
Marius Gedminas (mgedmin) wrote : Re: DisplayPort hotplugging is not detected on a ThinkPad X220

The bug still exists in yesterday's trusty daily image.

Specifically, test #1:
1. booted the daily image from USB
2. plugged in DisplayPort cable
3. nothing happened
4. ran xrandr in a terminal, external display was detected

Test #2:
1. plugged in DisplayPort cable
2. booted the daily image
3. had an extended desktop right from the beginning
4. unplugged the cable, desktop was reconfigured instantly
5. plugged the cable back, the hotplug was detected(!) and unity went back to extended desktop
6. unplugged the cable again, waited a bit longer
7. plugged the cable back in, nothing happened (and nothing continues to happen, several minutes later)

Will boot kernel v3.13-rc7-trusty from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D next