Hi, since some time I receive every now and then strange messages from teh kernel: Message from syslogd@X1E at Dec 21 08:09:04 ... kernel:[22896.715276][ C0] Uhhuh. NMI received for unknown reason 20 on CPU 0. Message from syslogd@X1E at Dec 21 08:09:04 ... kernel:[22896.715282][ C0] Do you have a strange power saving mode enabled? Message from syslogd@X1E at Dec 21 08:09:04 ... kernel:[22896.715283][ C0] Dazed and confused, but trying to continue The Laptop - ThinkPad X1 Extreme running TW - was on low power last night, hibernated, and on shore power since 30 minutes. Power settings are 'standard'. However, my impression is, that on battery mode the Laptop consumes more power than usual. Was there a change in powermanagement recently? Expected: ~ 15W Actual: ~25W It takes 25W with Nvidia Card enabed, according to prime -select, nvidia card is turend off OK, these are already 2 questions, but from the same area. Cheers Axel