2013/11/13 Grumbach, Emmanuel [off-list ref]:

According to System / HW, it is unsafe to disable L1 PM Substate using setpci, even if we disable it from both sides (device and bridge). This kind of settings should be done by BIOS only.
So we have 2 options here (assuming that we can't disable that in BIOS):
* either we try to disable L1 PM Substate even my colleagues think it is not safe
* either we just disable L1 altogether

Unsafe means battery blows up like a Samsung? :-)

My laptop is now connected to classroom's WiFi (with setpci
workaround) and running on battery, it seems the power consumption is
acceptable ... at least not too much more than before.

-- 
wzyboy