Thinkpad T420: unhandled HKEY in aggressive powersave mode

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I'm using a new Thinkpad T420 laptop with SandyBridge with OpenSUSE 11.4 
and OpenSUSE ThumbleWeed with KDE.

If the battery is empty and the system is in aggressive powersave mode, 
the screen becomes black if I plug in the power cable. Looks like the 
system is still working, but the screen is shut down. Even when changing 
to tty1 or when changing back to tty7/KDE, the screen remains black and 
unusable.

With dmesg I saw this errors: 

[  300.752879] [Hardware Error]: Machine check events logged
[  307.790734] thinkpad_acpi: unknown possible thermal alarm or keyboard 
event received
[  307.790760] thinkpad_acpi: unhandled HKEY event 0x6040
[  307.790762] thinkpad_acpi: please report the conditions when this 
event happened to ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx
[  307.792318] thinkpad_acpi: EC reports that Thermal Table has changed

=> Major bug, because it's not possible to work on the laptop if 
agressive powersave mode has already been reached. The system has to be 
rebooted after the power cable has been attached. Data loss is possible!

I also added this bug zu Novell's Bugzilla at:

https://bugzilla.novell.com/show_bug.cgi?id=727628

I'm not on the list, please send questions and answers directly to my 
mailaddress.

Peer


-- 
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