[mythtv-users] Random lockups on Mythbackend
dwoody1 at charter.net
Sun Dec 19 21:40:21 UTC 2010
Brian Wood wrote:
> On Monday, December 13, 2010 12:51:23 pm dwoody1 wrote:
>> On occasion the computer that has Mythbackend will lock up. This
>> occurs once every couple of weeks and sometimes three or four times
>> in a row. I have done a web search as well as looking through the
>> archives of Mythtv and found nothing that comes close to the problem
>> I am having. This leads me to believe that I have a setting that is
>> completely inappropriate or I have a hardware problem, but this is
>> the only failure that I have seen. I am running Fedora 13 with
>> Mythtv .24 with all updates for both and 1 Gig of memory. The
>> following snippet from the Myth log file may point to a problem but
>> I do not understand what it may be indicating. star9.home.com is the
>> computer with Mythbackend.
> You may have a hardware problem, as you say. Occasional hard locks are
> often hardware related.
> I'd run memtest for a couple of days to see if you have RAM problems.
> PSU problems also can cause this type of symptom.
Ran memtest86 for 65 hours. There were 137 passes with zero errors.
> You might try running the machine without Myth to see is you have a
> problem that's not related to Myth. Booting a Live CD of some flavor is
> also a good way to test hardware. Many of them have memtest built-in to
> Re-seating all your cards and DIMMs can also help sometimes.
I also did this.
> I assume you also checked the system log for clues, as well as Myth's
This log had nothing to indicate any problems.
Since the memtest ran for 64 hours and the computer normally runs for
just a few, it would seem NOT to be a heat related problem.
After the memtest I rebooted the computer and setup some shows to record
(also set to run mythcommflag) while we watched some that had been
recorded. I also started top from a remote login. After a short time the
computer locked up. The lockup consist of a frozen video and about 1/4
second of audio played over and over again until I rebooted.
From the remote login, I noticed that top showed mythcommflag was using
169% CPU. The CPU is:
AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
The motherboard is as Asus m2a-vm.
Could it be that the computer is not powerful enough to handle a
recording, mythcommflag job and a playback of a previous recorded show
at the same time?
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