[mythtv-users] Backend wakes up too early then shuts down and misses recording

[Tony Gould]

I've running a 0.27 system where my backend shuts down when idle and 
ACPI wakes up 10 minutes before recording. Normally this works very 
well, but I saw something very odd last night. The system finished a 
transcoding job just after 11pm, just after 2300, and the next recording 
was at 12:53am, i.e. 00:53. So it should have woken itself at approx 00:43.

What it actually did was wakeup at 00:29:40, decide that the next 
recording at 00:53 was too far into the future, and then, at 00:30:16, 
write the next ACPI wake up time as 00:29:40 (in the past!!!), and shut 
itself down. Needless to say, the recording was missed (or would have 
been if I hadn't been in the room tinkering with another box and spotted 
what was going on...)

Any ideas? Logs below.

Jan 29 23:03:48 tv mythbackend: mythbackend[1960]: I Scheduler 
scheduler.cpp:2839 (CheckShutdownServer) CheckShutdownServer returned - 
OK to shutdown
Jan 29 23:03:48 tv mythbackend: mythbackend[1960]: N Scheduler 
scheduler.cpp:2934 (ShutdownServer) Running the command to set the next 
scheduled wakeup time :-#012#011#011#011#011#011#011mythshutdown 
--setwakeup 2014-01-30T00:29:40
Jan 29 23:03:49 tv mythbackend: mythbackend[1960]: N Scheduler 
scheduler.cpp:2965 (ShutdownServer) Running the command to shutdown this 
computer :-#012#011#011#011#011#011#011sudo -H mythshutdown --shutdown
Jan 30 00:30:16 tv mythbackend: mythbackend[1912]: C thread_unknown 
mythcommandlineparser.cpp:2595 (ConfigureLogging) mythbackend version: 
fixes/0.27 [v0.27-122-g9d4b5e2] www.mythtv.org
...
Jan 30 00:31:27 tv mythbackend: mythbackend[1912]: I Scheduler 
scheduler.cpp:2839 (CheckShutdownServer) CheckShutdownServer returned - 
OK to shutdown
Jan 30 00:31:27 tv mythbackend: mythbackend[1912]: N Scheduler 
scheduler.cpp:2934 (ShutdownServer) Running the command to set the next 
scheduled wakeup time :-#012#011#011#011#011#011#011mythshutdown 
--setwakeup 2014-01-30T00:29:40
Jan 30 00:31:28 tv mythbackend: mythbackend[1912]: N Scheduler 
scheduler.cpp:2965 (ShutdownServer) Running the command to shutdown this 
computer :-#012#011#011#011#011#011#011sudo -H mythshutdown --shutdown