Automatic reboots on boot attempts

[jaymax]

uname -a =>FreeBSD MACH1 10.2-RELEASE FreeBSD 10.2-RELEASE #0 r286666: Wed
Aug 12 19:31:38 UTC 2015
root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC i386On booting,
everything seems to run OK up to a point. POST runs as expected,
hardware/device probe runs with bright white foreground text fonts to
stdout. I can't tell if the probe is completed because of its rapidity, but
apparently stalls afterwards as there is no further output, in fact the
screen display disappears.The system at this point or after some irregular
delay period will do an automatic reboot, [BIOS being set for auto reboot on
'Power OFF'].There is no indication of entering the init or getty stage of
the bootstrapping process?Perhaps an abort.i.e. no grey text displayed!There
is no evidence of a 'PANIC' either.My mobo caps seems fine, no bulges or
leaks!Of course I can't see those in the PSU, although I swapped another
in.And there is no dmesg to retrieve.Is there some way of figuring out what
is really going on here?Now, if I boot with the livefs {FreeBSD 10.2 Release
Disc} - system boots fine.mount -t ufs /dev/gpt/gptrootfs /mntmount -t devfs
/dev /mnt/devchroot /mntmount -aApart from a couple of fscks_ufs everything
seems fine and stable.Shutdown, followed by a power-up and the problem
re-asserts itself. My /boot/loader.conf is currently empty no customization
& everything should be 'at default", yet - continual reboots.Returning to
the livefs.I have to do a fsck_ufs on all the disks, system and non-system
disks:The universal precipitating message is"mount will invalidate journal
contents"Then the traditional fsck stuff with a...RECOVER ? yes**building
recover table****Resolving unreferenced inode list****Processing journal
entries**WRITE CHANGES? yes*****File System Marked Clean*****Should I do a
normal boot again, then the same auto reboots occur, necessitating an
unceremonious shutdown and perhaps dismount; anyway apparently the system
becomes dirty'. Given that the system did not mount I could have expected
this of the system disk but not all disks!What could possibly be amiss here
and what are reasonable possible solutions? hopefully not a
re-installation.Isn't it safe to assume that since the system is stable with
the livefs and all the disks mounted that I can eliminate any consideration
of a hardware problem? Thanks!



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