Haven't booted windows on this machine in years. and ubuntu doesn't show this effect here, either. What you say sounds like this: http://www.thinkwiki.org/wiki/Tp_smapi#Installation_on_Debian_unstable_.28sid.29.2C_testing_.28squeeze.29_or_stable_.28lenny.29 but that would apply to thinkpads only, right? Thanks to every one who responded! I guess, I'll log some figures and post a bug report. Best regards, FLO