[mythtv-users] bttv, anything locks backend -> zombie on attempted restart of backend

Sune Mølgaard sune at molgaard.org
Fri Jul 11 12:29:16 UTC 2008

Hi All,

As the subject hints at, any attempts to use mythtv for anything 
including accessing the bttv card results in the backend hanging. 
Attempting to restart the backend fails - more specifically, it refuses 
to die, but remains as a "zombie" process.

Various attempts to fix were made, even including fresh install with 
fresh db.

I am a bit vary about replicating the bug too often, since the zombie 
process prevents unmounting of the partition to which I would like to 
store the recordings, resulting in fsck'ing on reboot. Therefore, I 
would like to know how to maximise usable output.

Backend log with no special options only have 2 suspicious entries:

strange error flushing buffer ...


ioctl VIDIOC_G_FMT: Invalid argument

The documentation says to ignore the former, and as AFAICT from the 
source, the latter is expected for bttv...

The current kernel is rt2x00.git 2.6.25-rc9, which will be upgraded to a 
2.6.26-rc rt2x00.git kernel as soon as I can get it to work with my wifi 
card. In the event that the latest of those kernels actually allows me 
to boot into a usable system, I will naturally check if it resolves the 
mythtv issue.

Any ideas and suggestions are welcome :-)

Best regards,

Sune Mølgaard

If we are going to teach creation science as an alternative to 
evolution, then we should also teach the stork theory as an alternative 
to biological reproduction.
- Judith Hayes

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