The kernel panic is possibly related to videobuf2. This media tree is synced with linux media. Some of the drivers are starting to be moved to videobuf2. Any that have been are creating kernel panic. My Prof 7301 with cx-88 locks the whole machine up tight within minutes. I had to revert back to pre-videobuf2 cx-88.
The frontend has been modified to add in the ability to read the spectrum info from the device. You have to copy frontend.h and dmx.h over to /usr/include/linux/dvb/ then recompile your software before it can access frontend.
There is a support thread for the driver here....
http://rickcaylor.websitetoolbox.com/post/v4lupdatelee-6433163
updateDVB app here...
http://rickcaylor.websitetoolbox.com/post/updatedvb-thread-6428438
updatelee is the guy you want to talk to there.