[mythtv-users] Can't record or watch live TV

[Michael Watson]

On 28/07/2012 1:27 PM, Stephen Myers wrote:
> I have the latest mythtv (mythbackend version: fixes/0.25 
> [v0.25.2-8-g3256849]) on mythbuntu 12.04.  I'm getting the following 
> error in my mythbackend.log
>
> Jul 27 17:22:11 mythbox mythbackend[8561]: W CoreContext 
> dvbchannel.cpp:227 (Open) DVBChan(11:/dev/dvb/adapter0/frontend0): 
> Opening DVB frontend device failed.#012#011#011#011eno: Device or 
> resource busy (16)
> Jul 27 17:22:12  mythbackend[8561]: last message repeated 19 times
> Jul 27 17:22:12 mythbox mythbackend[8561]: E CoreContext 
> dvbchannel.cpp:232 (Open) DVBChan(11:/dev/dvb/adapter0/frontend0): 
> Failed to open DVB frontend device due to fatal error or too many 
> attempts.
> Jul 27 17:22:12 mythbox mythbackend[8561]: E CoreContext 
> channelbase.cpp:1229 (CreateChannel) ChannelBase: CreateChannel() 
> Error: Failed to open device /dev/dvb/adapter0/frontend0
> Jul 27 17:22:12 mythbox mythbackend[8561]: E CoreContext 
> main_helpers.cpp:196 (setupTVs) Problem with capture cardsCard 
> 11failed init
> Jul 27 17:22:12 mythbox mythbackend[8561]: W CoreContext 
> main_helpers.cpp:211 (setupTVs) MythBackend: No valid capture cards 
> are defined in the database.
>
>
> Seems like I have a permissions problem, but I'm not sure were to 
> look.  Any ideas?
>

Check the permissions on /dev/dvb/adapter0.  The user that runs the 
mythtv backend should be a member of the same group that owns the 
capture card.

*ls -lh /dev/dvb/adapter0/**
crw-rw----+ 1 root video 212, 1 Jul 30 11:15 /dev/dvb/adapter0/demux0
crw-rw----+ 1 root video 212, 2 Jul 30 11:15 /dev/dvb/adapter0/dvr0
crw-rw----+ 1 root video 212, 0 Jul 30 11:15 /dev/dvb/adapter0/frontend0
crw-rw----+ 1 root video 212, 3 Jul 30 11:15 /dev/dvb/adapter0/net0

*cat /etc/group | grep video*
video:x:44:mythtv