Re: Shuttle SB75G2

On Mon, Jan 19, 2004 at 07:09:35PM -0800, John Kennedy wrote:
> On Sun, Jan 18, 2004 at 10:32:09PM -0800, John Kennedy wrote:
> >   The system works well enough to load, boot and install 4.9 and 5.2.  I
> > can't get it to stay up long enough to recompile the OS (dies during
> > buildworld).  When the system dies, it tends to freeze or reboot.  Once, it
> > looked like it may have double-faulted (haven't chased that one down yet).
> 
>   At this point, I'm sort of running low on suspects.  It really doesn't
> seem to be FreeBSD since XP and Memtest86 can generate the same types of
> results.  Memtest86 in particular probably doesn't use much of the rest of
> the system.  XP has always hung, Memtest86 has always rebooted, and FreeBSD
> has done both. ...

  I had a few people (Nigel Weeks, Don Lewis, Sean Lazar -- thanks) suggest
thermal problems.  I tried to eliminate that early on by doing tests back
to back (expecting heat would make the failures come faster), but that
didn't seem very promising.

  Sean Lazar aimed me at "sysctl hw.acpi.thermal" under 5.2 so I ran that in
a sleep loop on another TTY and killed the system again with buildworld.
I'm assuming that the temperature shown is Kelvin * 10.

  Sitting at the BIOS, CPU is ~38 degrees Celsius and system is 31.  Not
quite sure which one ACPI is getting, but seems closer to system.  In any
case, temperature measurement goes from 3002 to 3202 before freezing (10
second increments), or about 27.05 Celsius (300.2 Kelvin) thru 47.05
Celsius (320.2).

  The system looks like it thinks high temp kicks in at 68 Celsius.

  At the moment, I can't lay my hands on any CPU documentation that says
what the optimal temperature range is.

  The first and last samples were:

	Tue Jan 20 05:51:32 GMT 2004
	hw.acpi.thermal.tz0.temperature: 3002
	hw.acpi.thermal.tz0.active: -1
	hw.acpi.thermal.tz0.thermal_flags: 0
	hw.acpi.thermal.tz0._PSV: 3632
	hw.acpi.thermal.tz0._HOT: -1
	hw.acpi.thermal.tz0._CRT: 3732
	hw.acpi.thermal.tz0._ACx: 3582 -1 -1 -1 -1 -1 -1 -1 -1 -1

	Tue Jan 20 06:03:35 GMT 2004
	hw.acpi.thermal.tz0.temperature: 3202
	hw.acpi.thermal.tz0.active: -1
	hw.acpi.thermal.tz0.thermal_flags: 0
	hw.acpi.thermal.tz0._PSV: 3632
	hw.acpi.thermal.tz0._HOT: -1
	hw.acpi.thermal.tz0._CRT: 3732
	hw.acpi.thermal.tz0._ACx: 3582 -1 -1 -1 -1 -1 -1 -1 -1 -1