[mythtv-users] 0 byte recordings with HD-PVR and Myth 0.28 on Ubuntu 14.04.2

[Gary Buhrmaster]

On Wed, May 13, 2015 at 12:30 AM, Fred Hamilton <fred at yonkitime.com> wrote:
....
> However "cat /dev/video0 > temp.ts" always works (if it's run before
> MythBackend tries to record something.  After Mythbackend tries and fails,
> "cat /dev/video0 > temp.ts" starts producing zero byte recordings as well.
> So it seems like the hardware and driver are OK until mythbackend tries to
> use it.

This suggests a more basic OS issue.  Did you happen
to upgrade the OS/kernel recently (or add another USB
device to the mix)?  There have been some recent fixes
in the kernel for various USB issues, and it is possible
that you are hitting a regression.