I am not sure, if this is a duplicate of Bug 595329 (and Bug 595330), which seem to concern the same or similar hardware (DELL) and usage of the RF component (except that I do not have bluetooth, but only a wireless 802.11 interface). Maybe even that it is related to Bug 511089?
After hibernation, I run into a critical situation: First the hotkey for the wireless interface activation does not seem to have an effect any more. This is independent of the state (active/inactive) right before the hibernation. The next symptom is that the kernel crashes with one or both of the following messages: "Trying to sleep while in wrong context" and "scheduling while atomic".
After reboot, the situation does not improve, and using the hotkey for the interface (hardware) activation leads to complete blocking of the PC. At the same time, dual boot on Windows works without problem, as does usage of the WiFi interface.
Rather regularly I get into the the situation after hibernation (not sleep!). There may be some rare hibernations which brought the system back correctly.
H/w concerned is a DELL Latitude D520.
This is a kernel related issue, reassigning.