Ubuntu
linux package

  1. Bug #1378863
  2. Comment #4

Comment 4 for bug 1378863

Revision history for this message
Marius Gedminas (mgedmin) wrote :

With kernel 3.17.0-031700-generic:

- 1st time I plugged in the DisplayPort connector, nothing happened (bug 1263681). I pressed Fn-Home as a workaround and external monitor got detected, but internal monitor went black (no picture, no backlight). Pressing Fn-Home again turned it on, at minimum brightness. Fn-Home/End brightness control keys continue to work.

- 1st unplug changed nothing

- 2nd hotplug was detected instantly, internal LCD went black again. Fn-Home was required again to bring it to life.

- 2nd unplug changed nothing

- 3rd hotplug was same as 2nd.

I can bring the internal LCD into the no-picture-no-backlight state by pressing Fn-End until I reach minimum brigthness. This is something new: with older kernel versions minimum brightness still had a visible picture.

Conclusion: latest kernel has one half of the bug (DP hotplugging drops screen brightness to minimum level) but so far hasn't shown the other half (brightness keys don't stop working).