[Bug 598674] [NEW] alt/sysreq/reisuo Required to Power Off

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I am using Kubuntu 10.04 on an IBM Thinkpad T20.  Upon selecting
K->Leave->Shutdown, the system runs through all expected shutdown
procedures except at the end I see a "Checking battery status" message
(probably irrelevant).  The screen blanks out but with a flashing cursor
in the upper left.  At this point there is no hard drive activity noted,
but power remains on and the fan is on.  I can either press the power
button for 5 - 7 seconds for a poweroff shutdown or press the
"alt/sysrq/reisuo" sequence which displays a series of responses
followed by powering off.

I have tried, while still in KDE, to open a konsole and entering sudo
/sbin/shutdown -P now, which results in a reboot cycle.  I have tried,
while still in KDE, to enter "ctrl/alt/del", which results in a reboot
cycle.  I have tried removing the "acpi=force" parameter from
/etc/default/grub, which gives all the same results except for the final
displayed messages, before requiring the same manual interventions.

I upgraded from Kubuntu 9.10, which displayed none of these behaviors,
to Kubuntu 10.04 and have applied all requested patches and updates
since then.  Current kernel:

john at john-laptop:/etc/default$ uname -a
Linux john-laptop 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 22:02:19 UTC 2010 i686 GNU/Linux

Kubuntu release:

john at john-laptop:/etc/default$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 10.04 LTS
Release:        10.04
Codename:       lucid

This does not prevent me from operating with my laptop, but it is wrong.

** Affects: kdebase (Ubuntu)
     Importance: Undecided
         Status: New

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alt/sysreq/reisuo Required to Power Off
https://bugs.launchpad.net/bugs/598674
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