[mythtvnz] Pointers on how to track down machine lockup

Mon Oct 11 00:35:40 BST 2010

I had a similar problem that I eventually traced to the power supply, it was under-rated for the number of hard disks (etc) that I had.  Replace the power supply and viola everything was stable again. 

What size PSU do you have and what is the total power requirement of your system? 

Cheers
Douglsa.

Quoting Wade Maxfield <mythtvnz at hotblack.co.nz>:

> On 14/09/2010, at 10:25 PM, Solor Vox wrote:
>
>> Hello Wade,
>>
>> Standard things to check when having hardware instability:
>> (in order)
>>
>> * Heat, try and setup lmsensors and monitor your CPU/chipset temps, make
>> sure fans are all running and the heatsinks are free of dust
>>
>> * Bad RAM, run memtest86 for a few hours, it's listed on ubuntu boot menu
>>
>> * Hard disk, run fsck from a livecd to check for filesystem errors, run
>> SMART tools to check for hardware problems
>>
>> * Power supply, bad power supplies can cause problems, see if your local
>> IT shop can run a PSU tester on it.  Make sure you're not pulling too many
>> watts.
>>
>> * If it's a new system, ensure the clock speeds, FSB or BLK for I7 are
>> correct.  Also verify your memory settings.
>>
>> * Lastly, check dmesg/logs for any signs.  Lots of segfaults might
>> indicate faulty memory or CPU.
>>
>>
>> Cheers,
>> sV
>>
>
>
> I went through that list and didn't find anything that stood out as 
> an issue. Can't find any evidence of bad RAM after running memtest 
> for 20+ hours, CPU and other temps are all under 40°C, no mention of 
> segfaults in any log, and I reset the BIOS to the failsafe defaults.
>
> So I clean installed Ubuntu 10.04 Server, and then added enough 
> packages to get MythTV & gdm running and a few other things like 
> lm-sensors, smartmon & epgsnoop, etc. I have't added any Nvidia 
> packages. Machine still locked up every few days for the following 
> 2-3 weeks.
>
> I then found a BIOS update for the motherboard, installed that Oct 2 
> and since then the machine hasn't locked up.  8)
>
> But it has spontaneously restarted itself twice.  Oct 9 16:32, and 
> Oct 11 9:05.
>
> I can't find anything in the logs to indicate why it's doing that 
> though.  Going through syslog and kern.log the machine is just 
> operating normally, then all of a sudden it's booting. It's connected 
> to a UPS so it shouldn't be losing power or restarting because of 
> some sort of power spike. Nobody was sitting in front of the machine 
> at the time, but a remote frontend was playing back a recording 
> during the Oct 9 restart.
>
> Any thoughts on where to look or other things to try?
>
>
>  - Wade
>
>
>
> syslog (Oct 9)
> ------
> Oct  9 16:17:01 mythtv mountd[1528]: authenticated unmount request 
> from 192.168.1.60:906 for /storage/recordings2 (/storage/recordings2)
> Oct  9 16:17:01 mythtv CRON[15441]: (root) CMD (   cd / && run-parts 
> --report /etc/cron.hourly)
> Oct  9 16:17:21 mythtv mountd[1528]: authenticated mount request from 
> 192.168.1.60:906 for /storage/recordings2 (/storage/recordings2)
> Oct  9 16:25:57 mythtv dhclient: DHCPREQUEST of 192.168.1.57 on eth0 
> to 192.168.1.1 port 67
> Oct  9 16:25:57 mythtv dhclient: DHCPACK of 192.168.1.57 from 192.168.1.1
> Oct  9 16:25:57 mythtv dhclient: bound to 192.168.1.57 -- renewal in 
> 1398 seconds.
> Oct  9 16:32:48 mythtv kernel: imklog 4.2.0, log source = /proc/kmsg started.
> Oct  9 16:32:48 mythtv rsyslogd: [origin software="rsyslogd" 
> swVersion="4.2.0" x-pid="1068" x-info="http://www.rsyslog.com"] 
> (re)start
> Oct  9 16:32:48 mythtv rsyslogd: rsyslogd's groupid changed to 103
> Oct  9 16:32:48 mythtv rsyslogd: rsyslogd's userid changed to 101
> Oct  9 16:32:48 mythtv rsyslogd-2039: Could no open output file 
> '/dev/xconsole' [try http://www.rsyslog.com/e/2039 ]
> Oct  9 16:32:48 mythtv kernel: [    0.000000] Initializing cgroup 
> subsys cpuset
> Oct  9 16:32:48 mythtv kernel: [    0.000000] Initializing cgroup subsys cpu
> Oct  9 16:32:48 mythtv kernel: [    0.000000] Linux version 
> 2.6.32-25-server (buildd at yellow) (gcc version 4.4.3 (Ubuntu 
> 4.4.3-4ubuntu5) ) #44-Ubuntu SMP Fri Sep 17 21:13:39 UTC 2010 (Ubuntu 
> 2.6.32-25.44-server 2.6.32.21+drm33.7)
> Oct  9 16:32:48 mythtv kernel: [    0.000000] Command line: 
> BOOT_IMAGE=/boot/vmlinuz-2.6.32-25-server 
> root=UUID=4f627233-bc71-4116-b416-9fa22d15f6d3 ro quiet
>
>
> kern.log (Oct 9)
> --------
> Oct  9 14:53:21 mythtv kernel: [609531.635189] [drm] nouveau 
> 0000:01:00.0: Setting dpms mode 0 on tmds encoder (output 1)
> Oct  9 15:53:39 mythtv kernel: [613142.994774] [drm] nouveau 
> 0000:01:00.0: Setting dpms mode 3 on tmds encoder (output 1)
> Oct  9 16:32:48 mythtv kernel: imklog 4.2.0, log source = /proc/kmsg started.
> Oct  9 16:32:48 mythtv kernel: [    0.000000] Initializing cgroup 
> subsys cpuset
> Oct  9 16:32:48 mythtv kernel: [    0.000000] Initializing cgroup subsys cpu
> Oct  9 16:32:48 mythtv kernel: [    0.000000] Linux version 
> 2.6.32-25-server (buildd at yellow) (gcc version 4.4.3 (Ubuntu 
> 4.4.3-4ubuntu5) ) #44-Ubuntu SMP Fri Sep 17 21:13:39 UTC 2010 (Ubuntu 
> 2.6.32-25.44-server 2.6.32.21+drm33.7)
>
>
>
>
> syslog (Oct 11)
> ------
> Oct 11 09:02:52 mythtv sensord:   temp1: 36.0 C (min = 127.0 C, max = 
> 127.0 C)
> Oct 11 09:02:52 mythtv sensord:   temp2: 26.0 C (min = 127.0 C, max = 
> 127.0 C)
> Oct 11 09:02:52 mythtv sensord:   temp3: 18.0 C (min = 127.0 C, max = 60.0 C)
> Oct 11 09:02:52 mythtv sensord:   cpu0_vid: +0.000 V
> Oct 11 09:05:59 mythtv kernel: imklog 4.2.0, log source = /proc/kmsg started.
> Oct 11 09:05:59 mythtv rsyslogd: [origin software="rsyslogd" 
> swVersion="4.2.0" x-pid="1263" x-info="http://www.rsyslog.com"] 
> (re)start
> Oct 11 09:05:59 mythtv rsyslogd: rsyslogd's groupid changed to 103
> Oct 11 09:05:59 mythtv rsyslogd: rsyslogd's userid changed to 101
> Oct 11 09:05:59 mythtv rsyslogd-2039: Could no open output file 
> '/dev/xconsole' [try http://www.rsyslog.com/e/2039 ]
> Oct 11 09:05:59 mythtv kernel: [    0.000000] Initializing cgroup 
> subsys cpuset
> Oct 11 09:05:59 mythtv kernel: [    0.000000] Initializing cgroup subsys cpu
> Oct 11 09:05:59 mythtv kernel: [    0.000000] Linux version 
> 2.6.32-25-server (buildd at yellow) (gcc version 4.4.3 (Ubuntu 
> 4.4.3-4ubuntu5) ) #44-Ubuntu SMP Fri Sep 17 21:13:39 UTC 2010 (Ubuntu 
> 2.6.32-25.44-server 2.6.32.21+drm33.7)
>
>
> kern.log (Oct 11)
> --------
> Oct 11 06:29:39 mythtv kernel: [136363.763581] [drm] nouveau 
> 0000:01:00.0: Setting dpms mode 3 on tmds encoder (output 1)
> Oct 11 07:59:20 mythtv kernel: [141735.019647] [drm] nouveau 
> 0000:01:00.0: Setting dpms mode 0 on tmds encoder (output 1)
> Oct 11 09:05:59 mythtv kernel: imklog 4.2.0, log source = /proc/kmsg started.
> Oct 11 09:05:59 mythtv kernel: [    0.000000] Initializing cgroup 
> subsys cpuset
> Oct 11 09:05:59 mythtv kernel: [    0.000000] Initializing cgroup subsys cpu
> Oct 11 09:05:59 mythtv kernel: [    0.000000] Linux version 
> 2.6.32-25-server (buildd at yellow) (gcc version 4.4.3 (Ubuntu 
> 4.4.3-4ubuntu5) ) #44-Ubuntu SMP Fri Sep 17 21:13:39 UTC 2010 (Ubuntu 
> 2.6.32-25.44-server 2.6.32.21+drm33.7)
>
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