** Description changed:

  Binary package hint: gnome-power-manager
  
  Distro:
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=8.04
  DISTRIB_CODENAME=hardy
  DISTRIB_DESCRIPTION="Ubuntu hardy (development branch)"
  
  Package:
  gnome-power-manager 
  
  Version: 
  2.21.92-0ubuntu1
  
  Problem:
  
  My laptop computer (Clevo D400S / Intel P4 1.8GHz / SiS 650 Chipset) has
  strange behaviour in Ubuntu 7.10 and 8.04 when suspending. I have
  experienced lockups on some resumes usually 1 of 3 and narrowed the
  behaviour by extensive testing and here is how I can reproduce it:
  
  1. I startup the book on battery; 
  2. I suspend after loaded to desktop;
  3. Then when suspended I plug in the AC;
  4. I resume it;
  5. Everything goes fine;
  6. And here if I unplug the AC my book locksup; 
  
  There is no output in /var/log/syslog or kernlog, and the suspend log
  goes normal.
  
  I have tested this with the stock 7.10 kernel, as well as with Debian's
  2.6.24 kernel and same story repeats.
  
  What I discovered is that if I kill gnome-power-manager after  step 5 and 
before step 6 - there is no lockup and 
  system continues to function properly. If I restart it after killing it - 
everything continues to work properly. I decided that I will try to upgrade to 
8.04 and see if this has been fixed - and indeed there was no such problem with 
2.6.24 , but gnome-power-manager didn't measure battery at all only #acpi did. 
Then I started 8.04 with the 2.6.22 kernel and gnome-power-manager measured 
everything fine but the initial problem reappeared.
  
  Now I am not totally sure that the bug is in gnome-power-manager or in
  the connection between that and the acpi system or in the kernel itself.
  But it looks like the rest of the system works fine if gnome-power-
  manager doesnt interfere too much with it (8.04 + 2.6.24). I hope it is
  an isolated problemon my machine - I will just execute a script to kill
  and restart g-p-m on resume but if it is a bug it needs to be fixed imo.
+ 
+ 
+ 04 Mar | Update:
+ 
+ After yesterday's updates (2.6.24-10 to 11):
+ 1. g-p-m detects battery life correctly.
+ 2. lockups are back as well.

** Tags added: acpi g-p-m gnome-power-manager

-- 
Lockup on AC cable unplugged
https://bugs.launchpad.net/bugs/198144
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