> > - Investigating the E LED. This requires taking a look at the DSDT > > dump from your laptop and searching for clues as to how this LED is > > handled. I will be happy to do that, but again, no promises about > > how much time it will take. (And given the nature of this task, I > > cannot promise I will find anything reasonable at all. I also might > > ask you to do some further experiments as I do not have an E751 > > myself.) I feel stupid for only suggesting this now, but can this simply be the eco LED? The DSDT dump from your laptop suggests so, as well as the description of the E LED in the manual. Have you tried playing around with /sys/class/leds/fujitsu::eco_led? > Don't forget to take a look at the I LED... I could not find anything in the DSDT dump from your laptop that would suggest this LED can be controlled using ACPI. -- Best regards, Michał Kępień