The following options can be passed to tvheadend to provide detailed debugging information while the application is running. Trace debugging has to be enabled at build time with--enable-debugging and can be specified in a CLI command, e.g. tvheadend -u hts -g video --trace <module> or in the web interface (Configuration -> Debugging).
Multiple options can be used, e.g. –-trace cwc,dvr,linuxdvb