Public bug reported:
I have an HP Elitebook 6930p laptop running Jaunty (and formerly
Intrepid, but this is a clean install of Jaunty, not an upgrade).
I find that the lid switch on this machine works on battery, and works
on AC after the machine has been running on battery, but doesn't work on
AC if the machine has been on AC ever since boot.
When it's not working:
- evtest /dev/input/event2 never shows any events happening
- I never see lid closed events in the Power History applet
- the machine doesn't sleep when I close the lid, even when it's configured to
do so
it's pretty clear the lid switch event is just not arriving.
I can reproduce this easily by:
1) plug the machine into AC power
2) boot (or reboot if it's already up)
3) close lid, wait for machine to suspend (it won't), open lid
4) look for any evidence of lid closing in Power History (there won't be any
events)
5) unplug and immediately replug AC power
6) close lid
7) machine will suspend. Open lid, press power button to resume.
8) note the lid close event will show in Power History as well
I'm pretty sure the lid switch worked (without needing to force a power
supply transition) under Intrepid on this machine.
Version info:
mg-elitebook:~> uname -a
Linux mg-elitebook 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC
2009 x86_64 GNU/Linux
mg-elitebook:~> lsb_release -rd
Description: Ubuntu 9.04
Release: 9.04
** Affects: ubuntu
Importance: Undecided
Status: New
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lid switch on HP 6930p works only after running on battery
https://bugs.launchpad.net/bugs/372824
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