[mythtv-users] 2 recordings failed at the same time

Stephen Worthington stephen_agent at jsw.gen.nz
Mon Oct 26 10:41:46 UTC 2020


On Mon, 26 Oct 2020 06:01:56 -0400, you wrote:

>My log file has always been sprinkled with these 2 Permission denied 
>errors.
>
>/Oct 25 19:00:23 mythbuntu mythpreviewgen[57623]: mythpreviewgen[57623]: 
>I CoreContext platforms/mythpowerdbus.cpp:530 (AcquireLock) PowerDBus: 
>Failed to delay sleep,shutdown: Permission denied/
>Oct 25 19:00:23 mythbuntu mythpreviewgen[57623]: mythpreviewgen[57623]: 
>I CoreContext platforms/mythpowerdbus.cpp:360 (DeviceAdded) PowerDBus: 
>Added UPower.Device '/org/freedesktop/UPower/devices/ups_hiddev0'
>Oct 25 19:00:23 mythbuntu mythpreviewgen[57623]: mythpreviewgen[57623]: 
>I CoreContext mythpower.cpp:348 (PowerLevelChanged) Power: On AC power
>Oct 25 19:00:23 mythbuntu mythpreviewgen[57623]: mythpreviewgen[57623]: 
>I CoreContext mythpower.cpp:131 (Init) Power: Supported actions: None
>/Oct 25 19:00:23 mythbuntu mythpreviewgen[57623]: mythpreviewgen[57623]: 
>E CoreContext main.cpp:77 (preview_helper) Setting priority failed.//
>//eno: Permission denied (13)/
>
>However this system has recorded gigabytes of programs while these 
>errors continue to accumulate.
>
>Not sure what they mean.
>
>Yesterday I always had a couple of football games being recorded but it 
>wasn't until 7PM with the start of 2 new recordings that I had a problem 
>of nothing being written to a file.
>
>The only thing new yesterday was frontend related. I just built a new 
>x86_64 frontend with an Nvidia GT1030 gfx card on Archlinux KDE Plasma. 
>When I built mythtv I only configured the frontend and it worked fine. 
>However it was v0.31-118 and my backend is on Ubuntu is 
>v0.31-202010122044. Both the most current v31 releases. I was using this 
>frontend to view all recordings yesterday.
>
>My backend was built about as standard as you could get from an Ubuntu 
>point of view, nothing weird.
>
>It's what I've done before and has been recording fine since July when I 
>did the most recent complete rebuild. FWIW, I documented it here: 
>https://mythtvinstall.blogspot.com/2020/07/combined-mythtv-v31-media-system-and.html
>
>I checked this morning and all my recordings since the reboot around 
>7:30pm last night have been fine.
>
>Jim A

I do not think those permissions messages are a real problem.  My
reading of them is that you are probably running mythbackend as
non-root user, so it does not have the right permissions to send power
control commands or to set program priorities.  So I think those are
red herrings.

Using a slightly older version of mythfrontend should not be any
problem - all the protocols used to talk between MythTV programs are
only supposed to be changed with a major version, and they all have
protocol version information anyway.

There is not much detail in the log about the recording process, so it
is very difficult to tell what happened.  I would recommend adding the
"-v record" option to the mythbackend command line to get it to log
about the recording process in future.


More information about the mythtv-users mailing list