[mythtv-users] femon only works with mythbackend stopped?
digitalaudiorock at gmail.com
Sun Nov 25 18:17:56 UTC 2007
On Nov 24, 2007 2:25 PM, Tom Dexter <digitalaudiorock at gmail.com> wrote:
> On Nov 24, 2007 11:42 AM, Paul Bender <pebender at san.rr.com> wrote:
> > Tom Dexter wrote:
> > > I'm running Gentoo with media-tv/linuxtv-dvb-apps-18.104.22.16870114,
> > > media-tv/mythtv-0.20.2_p14324 and kernel 2.6.22-gentoo-r9. I have
> > > three HD-5500 cards used only for ATSC OTA broadcasts.
> > >
> > > Everything I keep reading indicates that I should be able to monitor
> > > signal strength with femon while the backend is running, which would
> > > be awesome...I've been looking for a way to do that. However it only
> > > works with the backend stopped. If I try to use it while the backend
> > > is running the only output I get is:
> > >
> > > opening frontend failed: No such file or directory
> > >
> > > ...on all three of my adapters, even though the device files are there.
> > >
> > > Is this supposed to work? If so, any ideas why it wouldn't? Thanks.
> > I have idea what femon is, so take my advice with a grain of salt.
> > Using mythtv-setup, mythbackend can be configured to hold onto the tuner
> > cards either all the time or only when in use. You might try changing
> > that setting for your tuner cards and see if it helps.
> > _______________________________________________
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> > mythtv-users at mythtv.org
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> I found something...it appears to be a bug in the cx88-dvb kernel
> driver. It is in fact supposed to allow an arbitrary number of read
> accesses at once:
> I'm checking right now to determine when/if that fix was incorporated
> into the kernel.
That kernel patch worked perfectly, although I had to add 70 to all
the line numbers in the patch for it to apply to my kernel. Now I can
even open a terminal on the frontend and ssh to the backend while
watching live TV and monitor the signal strength etc while adjusting
my antenna rotor....very cool.
I don't as yet see any sign of that patch or anything like it in any
kernels available in Gentoo portage, even in 2.6.23.
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