Spontaneous Reboots (I thought it was Virtualbox Kernel Modules)
I have commented out the lines that load kernel modules for virtualbox, and made sure they were gone with kldstat. However I am still getting VERY infrequent spontaneous reboots. So it is not the modules. I am thinking hardware. It has a temperature alarm that sounds when it is hot, but since I have cleaned it out I have not had any issues with heat. I am thinking bad processor/ram. It is behaving the same way before/after the upgraded to the latest release. What do you guys think? Regards, Chris Maness ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules)
On Tue, Aug 24, 2010 at 7:29 PM, Chris Maness ch...@chrismaness.com wrote: I have commented out the lines that load kernel modules for virtualbox, and made sure they were gone with kldstat. However I am still getting VERY infrequent spontaneous reboots. So it is not the modules. I am thinking hardware. It has a temperature alarm that sounds when it is hot, but since I have cleaned it out I have not had any issues with heat. I am thinking bad processor/ram. It is behaving the same way before/after the upgraded to the latest release. What do you guys think? Unless you're using ECC RAM, bad RAM should still be #1 on your watchlist, closely followed by bad PSU. Even RAM that worked fine in the past can start exhibiting bit errors a few years later (maybe due to mechanical stress, i.e. vibrations or frequent temperature differences?) and esp. el cheapo PSUs have the tendency to degrade over time. Of course, a software bug may always be possible. Have you tried to get a core dump? If so, does the error always happen at the same place (backtrace / bt is your friend)? If the error keeps occurring at different locations, it's almost always dodgy hardware. Regards, Chris Maness -cpghost. -- Cordula's Web. http://www.cordula.ws/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules)
From owner-freebsd-questi...@freebsd.org Tue Aug 24 12:29:16 2010 Date: Tue, 24 Aug 2010 10:29:27 -0700 From: Chris Maness ch...@chrismaness.com To: freebsd-questions@freebsd.org Subject: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules) I have commented out the lines that load kernel modules for virtualbox, and made sure they were gone with kldstat. However I am still getting VERY infrequent spontaneous reboots. So it is not the modules. I am thinking hardware. It has a temperature alarm that sounds when it is hot, but since I have cleaned it out I have not had any issues with heat. I am thinking bad processor/ram. It is behaving the same way before/after the upgraded to the latest release. What do you guys think? I think its 100% certain that it is hardware, or software. *GRIN* You can try randomly replacing things, which can be expensive, time- consuming, and not necessarily effective -- how do you *KNOW* that the parts you're putting _IN_ do not, themselves, have (as-yet undiscovered) problems? I'd try to make the box tell me something about *why* it crashed. crank up the level of logging for 'kernel' events in syslog.con, enable crash dumps, and make sure the boot process saves the dump Then you can get into the weird,wonderful, world of 'crash dump' analysis. With a few dumps in hand, you can begin to see if there is any consistency in what the machine was doing -when- it crashed. Happy hunting ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules)
On Tue, Aug 24, 2010 at 12:47 PM, Robert Bonomi bon...@mail.r-bonomi.com wrote: From owner-freebsd-questi...@freebsd.org Tue Aug 24 12:29:16 2010 Date: Tue, 24 Aug 2010 10:29:27 -0700 From: Chris Maness ch...@chrismaness.com To: freebsd-questions@freebsd.org Subject: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules) I have commented out the lines that load kernel modules for virtualbox, and made sure they were gone with kldstat. However I am still getting VERY infrequent spontaneous reboots. So it is not the modules. I am thinking hardware. It has a temperature alarm that sounds when it is hot, but since I have cleaned it out I have not had any issues with heat. I am thinking bad processor/ram. It is behaving the same way before/after the upgraded to the latest release. What do you guys think? I think its 100% certain that it is hardware, or software. *GRIN* You can try randomly replacing things, which can be expensive, time- consuming, and not necessarily effective -- how do you *KNOW* that the parts you're putting _IN_ do not, themselves, have (as-yet undiscovered) problems? I'd try to make the box tell me something about *why* it crashed. crank up the level of logging for 'kernel' events in syslog.con, enable crash dumps, and make sure the boot process saves the dump Then you can get into the weird,wonderful, world of 'crash dump' analysis. With a few dumps in hand, you can begin to see if there is any consistency in what the machine was doing -when- it crashed. Happy hunting When I looked at the regular level kernel log, it seemed to be out of the clear blue. I am an experienced user, but I am not sure if I have the programing skills to look at debug output to find a fault. I might need a bit of hand holding on this one. I looked at backtrace to. I was thinking it was a command or something, but it looks like some debugging procedure. Regards, Chris Maness ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules)
On 24/08/2010 10:58 μ.μ., Chris Maness wrote: On Tue, Aug 24, 2010 at 12:47 PM, Robert Bonomi bon...@mail.r-bonomi.com wrote: From owner-freebsd-questi...@freebsd.org Tue Aug 24 12:29:16 2010 Date: Tue, 24 Aug 2010 10:29:27 -0700 From: Chris Maness ch...@chrismaness.com To: freebsd-questions@freebsd.org Subject: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules) I have commented out the lines that load kernel modules for virtualbox, and made sure they were gone with kldstat. However I am still getting VERY infrequent spontaneous reboots. So it is not the modules. I am thinking hardware. It has a temperature alarm that sounds when it is hot, but since I have cleaned it out I have not had any issues with heat. I am thinking bad processor/ram. It is behaving the same way before/after the upgraded to the latest release. What do you guys think? I think its 100% certain that it is hardware, or software. *GRIN* You can try randomly replacing things, which can be expensive, time- consuming, and not necessarily effective -- how do you *KNOW* that the parts you're putting _IN_ do not, themselves, have (as-yet undiscovered) problems? I'd try to make the box tell me something about *why* it crashed. crank up the level of logging for 'kernel' events in syslog.con, enable crash dumps, and make sure the boot process saves the dump Then you can get into the weird,wonderful, world of 'crash dump' analysis. With a few dumps in hand, you can begin to see if there is any consistency in what the machine was doing -when- it crashed. Happy hunting When I looked at the regular level kernel log, it seemed to be out of the clear blue. I am an experienced user, but I am not sure if I have the programing skills to look at debug output to find a fault. I might need a bit of hand holding on this one. I looked at backtrace to. I was thinking it was a command or something, but it looks like some debugging procedure. Regards, Chris Maness If the reboot is so abrupt and sudden that nothing is logged (like someone pressing the reset button), it is most probably hardware. As others have said the most usual culprits are RAM and power supply. If you have any spare parts at hand, it may be worth the effort to try with an other power supply. If the reboot happens when the system is stressed (lots of disk activity and/or high power consumption by the CPU, like when portupgrading) the power supply is even more suspect. Bad RAM usually causes error messages and dumps to appear rather than out of the blue reboots. Since it is unlikely that the same program will always be in the faulty area of memory each time, the dumps will not be consistent - will seem to be caused by entirely different apps. It is still worthy to at least take out the RAM modules and clean the contacts before reinstalling. Use rubbing alcohol (a pen eraser is also good for gold plated contacts). Many RAM problems on older systems are definitely caused by dust and corrosion on these contacts. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules)
When I looked at the regular level kernel log, it seemed to be out of the clear blue. I've seen once behaviour like this on FreeBSD and it was caused by faulty ECC memory comb. Incorrectable CRC error just caused a diagnosis beep sequence and then machine shut down immediately after. -Reko ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules)
On Tue, Aug 24, 2010 at 10:29:27AM -0700, Chris Maness wrote: I have commented out the lines that load kernel modules for virtualbox, and made sure they were gone with kldstat. However I am still getting VERY infrequent spontaneous reboots. So it is not the modules. I am thinking hardware. It has a temperature alarm that sounds when it is hot, but since I have cleaned it out I have not had any issues with heat. I am thinking bad processor/ram. It is behaving the same way before/after the upgraded to the latest release. What do you guys think? Regards, Chris Maness Sounds to me like power supply. Is the machine on a UPS? Have you checked out the power leads are properly seated? Have these reboots started to happen after you cleaned it out? Regards, -- Frank Contact info: http://www.shute.org.uk/misc/contact.html ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules)
I was thinking that, maybe, it's the PSU itself. Does the fan work? Do you have the ability to get temperatures inside your computer? Get those to poll every minute or so and write to a flat file? -- Ryan On Aug 24, 2010, at 4:02 PM, Frank Shute wrote: On Tue, Aug 24, 2010 at 10:29:27AM -0700, Chris Maness wrote: I have commented out the lines that load kernel modules for virtualbox, and made sure they were gone with kldstat. However I am still getting VERY infrequent spontaneous reboots. So it is not the modules. I am thinking hardware. It has a temperature alarm that sounds when it is hot, but since I have cleaned it out I have not had any issues with heat. I am thinking bad processor/ram. It is behaving the same way before/after the upgraded to the latest release. What do you guys think? Regards, Chris Maness Sounds to me like power supply. Is the machine on a UPS? Have you checked out the power leads are properly seated? Have these reboots started to happen after you cleaned it out? Regards, -- Frank Contact info: http://www.shute.org.uk/misc/contact.html ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Spontaneous Reboots (I thought it was Virtualbox Kernel Modules)
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 08/24/10 10:29, Chris Maness wrote: I have commented out the lines that load kernel modules for virtualbox, and made sure they were gone with kldstat. However I am still getting VERY infrequent spontaneous reboots. So it is not the modules. I am thinking hardware. It has a temperature alarm that sounds when it is hot, but since I have cleaned it out I have not had any issues with heat. I am thinking bad processor/ram. It is behaving the same way before/after the upgraded to the latest release. What do you guys think? You can try the following ( I believe this is in 8-STABLE ) echo 'hw.mca.enabled=1' /boot/loader.conf and reboot. If it's hardware supported machine check exception, then you may see which component has an issue on the console in the machine check output. - -Mark -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.16 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkx0N74ACgkQrDN5kXnx8yZfSgCeIrd2qXmatERuOhPwW2W6cqY0 FtEAnj3154huE/8aVl5W3zA22YjNw2UL =p002 -END PGP SIGNATURE- ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
