[mythtv-users] Could realtime commercial flagging cause hard lockup/freeze/hang?
finlay at moeraki.com
Wed Jun 4 03:02:54 UTC 2008
Greg Grotsky wrote:
> Hello all,
> I've been a mythtv user for a few years. My configuration is a
> single system frontend/backend. Since it's inception I have been
> using realtime commercial flagging and it has worked very well.
> However, I recently updated my mythtv svn tree (to 17392 from an
> update 5/3/08) and every once in a while the system completely hangs.
> It hangs to the point where the magic Alt-SysRq-REISUB does not reboot
> it, no SSH, no three-fingered-salute, no nothing.
> I get nothing in my logs (FE, BE, syslog, messages, etc) and it
> appears to happen when recording and doing commercial detection. It
> froze three times over three days and I started to worry. I
> completely disabled commercial detection and it worked for two days
> straight so I decided to turn comflagging back on because the queue
> was huge. It detected all the commercials in the recorded shows and
> the next day while recording and comflagging it died again! So I
> turned off the realtime comflag option and it has been working for two
> days now without a hang.
> I thought maybe it was a memory issue so I sacrificed a few shows
> and ran memtest86 overnight; it completed 12 cycles and didn't report
> any errors. None of the information I have proves anything but so far
> it's looking like some update done in may to the comflagger is the
> culprit. Anyone have information that supports or debunks this
> theory? It's not a big loss to not have realtime comflagging but it
> was a cool geek thing to tout. :)
I had something similar happen to my system recently while using
realtime commflag. After much futzing around with hardware I finally
realized that the OS seemed to be the problem. I had upgraded the system
from Ubuntu 710 to 804 a few weeks before and everything seemed OK but
then the problems started - system lockup when recording and
commflagging but working fine otherwise. I finally installed a clean
version of Mythbuntu 804 and everything has been working great for the
last 2 weeks.
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