Here's a DSDT with some debug lines in and the resulting dmesg. You can see all the values from _SB.PCI0.LPCB.EC.B* are 0, except BST0 == 2 (AC connected, 1 otherwise - at 72s I unplugged the AC, which eventually dims the backlight; at 86s I plugged AC back in and increased backlight).
** Attachment added: "dmesg from instrumented DSDT" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1289748/+attachment/4021582/+files/dmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1289748 Title: Battery information all zeros (charge level, capacity, design capacity, voltage, all 0) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1289748/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
