Sometimes, if after I've just shut down my Dell Latitude E5440 laptop I remove AC power by unplugging the adapter from the wall socket, the laptop just starts up again. If I then just shut it down again while on battery power, it stays shut down.
I did uncheck "Start on AC power" in the BIOS menu, and besides, even if that would have been enabled, the laptop should have started up when I plug in AC power, not when I unplug it.
Is this a motherboard issue? Should I exchange the AC adapter? Does this happen to anyone else using an E5440?
I'm using the laptop with Arch Linux, though I don't see how that can matter. I usually shut the computer down with 'shutdown -P now'.
