Finally had the appetite to look into this issue.
Still not working :( my investigations so far:
Folder permissions:
By default
/dev/dvb is root root
/dev/dvb/adapter0 is root root
/dev/dvb/apater0/demux0 is root video
/dev/dvb/apater0/dvr0 is root video
/dev/dvb/apater0/frontend0 is root video
/dev/dvb/apater0/net0 is root video
I created a udev rule in 41-mythtv-permissions.rules
SUBSYSTEM=="dvb", GROUP="mythtv"
I then ran:
sudo udevadm test /sys/class/dvb/dvb0.frontend0/
I could see the group being set in the test results, and then being set back in
a subsequent rule (rule 50)
So I renamed the rule to 51-mythtv-permissions.rules
I ran the test again, this time my group was set last, yay :)
Rebooted the box, the permissions now are:
/dev/dvb is root root
/dev/dvb/adapter0 is root root
/dev/dvb/apater0/demux0 is root mythtv
/dev/dvb/apater0/dvr0 is root mythtv
/dev/dvb/apater0/frontend0 is root mythtv
/dev/dvb/apater0/net0 is root mythtv
So I feel upbeat and try Mythfrontend and I get the dreaded "all tuners busy"
:(
Now I'm just confused! Maybe the video group was just fine all along?? Maybe
the issue is a mythtv configuration issue? is it trying to access
/dev/dvb/adapter0 but it should be trying to access /dev/dvb/adapater0/dvr0 ??
Yours,
Perplexed!!
> To: ubuntu-mythtv@lists.ubuntu.com
> From: e...@shubes.net
> Date: Sat, 26 May 2012 12:00:05 -0700
> Subject: Re: [ubuntu-mythtv] Your post: Upgraded to 12.04 and now having DVB
> permission issues - I have the same issue...
>
> http://www.reactivated.net/writing_udev_rules.html#ownership
>
> On 05/24/2012 01:22 PM, Mario Limonciello wrote:
> > Paul,
> >
> > I actually don't have the problem, I was trying to help someone on that
> > thread who was having it. Don't really have a solution right now. What
> > did you upgrade from that didn't have it? Maybe the best thing to do is
> > isolate when it was working last so can find out how it broke to
> > determine how to fix it.
> >
> > On Wed, May 23, 2012 at 4:15 PM, Paul Clark
> > <p...@aghast.co.uk
> > <mailto:p...@aghast.co.uk>> wrote:
> >
> > Hello
> >
> > I hope you don't me emailing you directly. I discovered your post
> > when googling and I'm having exactly the same issue. After
> > upgrading to 12.04 my /dev/dvb device permissions are set to
> > root:root after a reboot which causes a 'all tuners busy' problem in
> > MythTV. Like you I worked out I could fix this by doing a chmod but
> > the permissions get reset after a reboot.
> >
> > I've tried to work out how to change this using udev but nothing
> > seems to work.
> >
> > Did you find a solution to the problem?
> >
> > Cheers, Paul
> >
> >
> >
> >
> >
> > --
> > Mario Limonciello
> > supe...@gmail.com <mailto:supe...@gmail.com>
> >
> >
>
>
> --
> -Eric 'shubes'
>
>
> --
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