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