[taltman1]

I used blueproximity successfully with my Linux laptop. I bought the smallest bluetooth headset I could find ($25), removed all extraneous parts, and carried it on my person (not my bag). It was so small that I didn't notice it. Effectively like two-factor authentication for unlocking my laptop.

It's unwise to use your phone for this purpose, because a phone and laptop might both be swiped if you're not holding on to both. This has happened to folks at cafes or on mass transit in the Bay Area.

[lgeek]

I've tried to use blueproximity at some point (mostly for convenience because I sometimes forget to lock my screen), but the range of BT devices is too large for comfort. I could be anywhere in my flat or in the medium-sized open plan office at work and the phone in my pocket would still be in range.

[icebraining]

Have you tried configuring it? It has a slider that you can adjust to set a minimum power level, so that if the device is too far away it locks anyway, even if it can still detect it.