[mythtv-users] Need help - I can't start live TV or recordings

[Spencer Herzberg]

On Thu, May 5, 2011 at 8:44 PM, Michael Graham <mkgraham at gmx.com> wrote:

> I'm using Mythbuntu, and have tried with MythTV 0.24 and 0.25 - My
> recordings just show up as nonexistant and I cannot start live TV
> (there is a black screen, then it exits without warning).
>
> Here are the lines that look relevant from the backend log:
>
> 2011-05-05 19:29:46.348 TVRec(1): Changing from None to WatchingLiveTV
> 2011-05-05 19:29:46.390 TVRec(1): HW Tuner: 1->1
> 2011-05-05 19:29:46.435 format_to_mode() does not recognize V4L1
> 2011-05-05 19:29:46.472 LoadFromScheduler(): Error, called from backend.
> 2011-05-05 19:29:46.475 AutoExpire: CalcParams(): Max required Free Space:
> 2.0 GB w/freq: 15 min
> 2011-05-05 19:29:46.538 TVRec(1): Changing from WatchingLiveTV to None
> 2011-05-05 19:29:49.129
> FileRingBuf(/var/lib/mythtv/livetv/1050_20110505192940.nuv) Error:
> OpenFile(): File too small (0B).
> 2011-05-05 19:29:49.169 MainServer, Warning: Unknown socket closing
> MythSocket(0xffffffffa992ddf0)
> 2011-05-05 19:29:49.207 MythSocket(ffffffffa992ddf0:-1): writeStringList:
> Error, socket went unconnected.
>                        We wrote 0 of 29 bytes with 1 errors
>
> Judging from that, it looks like there's a V4L issue?
>
> I rolled back to 0.23 temporarily, and while I was able to start
> recordings and live TV, eventually the backend would stop responding
> and I'd have to ssh in and restart it (I'm using a standalone backend
> with my frontend attached via ethernet).
>
> Can someone help me out with this, please?
>
> Have you had any luck with this? I get a similar log output, specifically I
was looking at *format_to_mode() does not recognize V4L1.* Through some
digging I found this bug thread
https://bugs.launchpad.net/ubuntu/+source/mythtv/+bug/717717. It states that
V4L header files are not included in the latest kernel.

The thread also says it has been fixed in the mythbuntu nightly repos which
I tried but still as of today, doesn't seem to have fixed the issue. For
reference, I am using an HDPVR and just recently updated to 11.04 with the
2.6.38 kernel. Synaptic says I have *
2:0.24.0+fixes.20110511.97118ac-ubuntu0mythbuntu3* as the current installed
mythtv-backend version. I also tried the *test2* ppa listed at the end of
that bug thread and didn't seem to fix the issue either.

If you or someone else can give some more advice that would be great. I'd
rather not build mythtv from source, but if someone has some good
information on how to do it on 11.04 I'd be willing to give it a shot if it
will fix this issue.

Thanks

-Spencer
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