Comment 6 for bug 42590

The helper script gives the following error for me:
/usr/share/acpi-support/state-funcs: line 44: echo: write error: Invalid argument
I'm using the ndiswrapper driver, cause the native driver does not support 54M at all, and is terribly slow anyway. It does not have a device/rf_kill in /sys, which is used by the new feisty acpi script. This used to work in an older version of ubuntu, not sure when it stopped working, as i dont use the key very frequently.