IBM ThinkPad T40, WirelessLanCard: IPW2100 Laptop on Battery, UDEV Starts, Laptop instant off. Laptop on Wire, UDEV Starts without anyproblems. Cut the Powerwire after udev start: Laptop works 4,5h on Battery without any problems. Laptop on Wire, cut the powerwire, works on Battery (works fine) rmmod ipw2100: instant off. On Archlinux, ive load the IPW2100-Modul befor udev starts, udev works fine on battery. When the module is not loaded on UDEV start and i have no powewire pluged in, the laptops goes instantly off.
Uh, this is definitely not a systemd bug, more likely kernel issue. Please file a bug on the kernel bugzilla or (preferably) at your distribition's bug tracker.
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