[mythtv-users] /dev/dvb permissions

Stephen Worthington stephen_agent at jsw.gen.nz
Mon Jun 21 16:11:24 UTC 2021

On Mon, 21 Jun 2021 23:49:20 +1000, you wrote:

>After a recent update (fedora 34) mythbackend failed to show any card.
>Short story:
>	crw-rw----+ 1 root rtlsdr 212,  3 Jun 20 23:10 /dev/dvb/adapter0/frontend0
>so user mythtv cannot open it. chmod fixed it, and I added this to my startup scripts.
>Was this an intended change? This update brought in
>	mythtv-backend-31.0-17.147.20210421git05c16580e1.fc34.x86_64
>and friends as well as
>	kernel-5.12.11-300.fc34.x86_64
>	rtl-sdr-0.6.0-9.fc34.x86_64
>The group rtlsdr is new:
>	Jun 20 22:43:17 e7 groupadd[1678612]: group added to /etc/group: name=rtlsdr, GID=440
>	Jun 20 22:43:17 e7 groupadd[1678612]: group added to /etc/gshadow: name=rtlsdr
>	Jun 20 22:43:17 e7 groupadd[1678612]: new group: name=rtlsdr, GID=440
>Is there a possible conflict?
>Should user mythtv be added to the new group?

Have you by any chance installed some SDR (software defined radio)
packages?  It looks like some SDR software is using the tuner.

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