Why do my NPVR stop working?

[alvado]

NPVR suddenly stops working. Current recordings stop growing in size. Scheduled recordings will start but never grow beyond 0 size. Can't watch live tv either, in none of the tuners. But I can't see any error message anywhere. Restarting the services does nothing, the only thing that helps is a reboot.
May anybody steer me in the right direction to fix this issue, I have attached the logs 20 minutes or so after i noticed the problem again.
Thanks

[sub]

If restarting the software doesn't get it started, and you require a reboot, it's sounding like problem happening in the driver. Does unplugging the device, and plugging it back in help get it started again?