[mythtv-users] Masterbackend segfault when creating preview

[John Nissley]

Background
My setup is two backends and three frontends running on fedora.  One of 
the backend is running an old kernel just because I have not had the 
time to do and upgrade / rebuild yet.

The problem started about two weels ago when I upgraded to the latest 
trunk.  My master backend would segfault for no apparent reason but 
normally when I would hit an hour when three or four recordings would 
start at one time.  The myth update required a database schema change so 
I cleared out and rebuilt my tuners again just because sometimes I have 
to do that and it did not help.

Problem
As I continued to try to figure out what is happening I noticed that I 
would often get a masterbackend segfault when exiting a recording. I see 
the following error in my previewgen log file very often:
  mythpreviewgen[22833]: E CoreContext main.cpp:97 (preview_helper) 
Setting priority failed.
                         eno: Permission denied (13)
I have checked permissions on everything I can think of and I am running 
my backends as user mythtv and not root.  I also noticed that the 
preview ping files now show up in the frontend user home directory.  Not 
sure when that started but I assume it is because different front ends 
could be at different places in a recording.

And direction from the list to help me resolve this issue would be 
appreciated.