Re: 2 core dumps


On Fri, 2008-02-22 at 12:09 +0100, Dag-Erling Smørgrav wrote:
Mikael Ikivesi <mikael.ikivesi@xxxxxxxxxx> writes:
I have checked for overheating as it was my first quess but the answer
is no. And these dumps happened without powerd. I only manually enable
1800Mhz sometimes if I need extra speed. It seems to be highest
sustainable speed for this machine. Powerd heats this laptop too much
without manually setting _PSV value to much lower. And the result would
be the same 1800Mhz.

Your laptop overheats when running at its rated frequency? That's your
answer. Hardware error. Most likely incorrect application of heat
transfer compound between the CPU and the heatsink, or blocked or
defective fans. If your CPU has overheated even once, you can't trust
it any more, unless it has an automatic cutoff like Core and Core 2.

If "overheated" in this context means "initiated critical shutdown"
neither statement needs to be true. For instance, there is the patch
from Umemoto-san floating around acpi@ that enables use of passive
cooling for the thermal zones other that tz0, and there is at least one
model of laptop that I know of, which uses tz1 for its CPU. This means
that FreeBSD *will not* handle passive cooling on such laptop and it
might reach _CRT and shut itself down. Also, some manufacturers put _PSV
dangerously close to _CRT, assuming that OS will take over in time,
which might or might not happen in the real life.

However, if "overheated" means "discolored and deformed plastic parts",
you are absolutely right.

DES
--
Alexandre "Sunny" Kovalenko (Олександр Коваленко)

_______________________________________________
freebsd-current@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@xxxxxxxxxxx"

Relevant Pages

  • Re: powerd adaptive mode latching
    ... because my laptop is lagging too much under certain speeds. ... poor interactive response can result when CPU ... I'll try this patch, but in my situation powerd drops cpufreq to 300HZ, and at this point switching windows is too lagged. ... I do not think that powerd can increase fast enough the freq to let me switch between application without lagging ...
    (freebsd-current)
  • Re: -current is sluggish
    ... after upgrading to today's current my laptop is very sluggish ... beetle% uname -a ... CPU: IntelPentiumM processor 1.60GHz ... Maybe the laptop is just "bored" and powerd scales down ...
    (freebsd-current)
  • Re: RELENG_7 2008/01/10 desktop system also periodically freezes
    ... irq 17: pcm0 ath0 ... I am experiencing hard hang on my laptop when ath0 is brought up and ... Reliable workaround for me was to stop powerd before turning on ath0 on the ... lowering the frequency of the CPU. ...
    (freebsd-stable)
  • Re: System over heating
    ... reinstall XP Pro on it yesterday and now I am having this really strange problem with the over heating. ... computing cores can run at a safe temp when the CPU is running at ... There is yet another reason that a laptop can run warmer than normal. ... On my computer, the idle loop uses the HLT instruction, ...
    (microsoft.public.windowsxp.hardware)
  • Re: powerd freeze with amd 5000 X2 but not with lower cpus
    ... computer freezes some seconds after powerd is started. ... I thought it is MB related and did the same and again the 5000 cpu ... freeze, the smaller ones not. ...
    (freebsd-stable)