Re: sudden power loss (WAS: sudden power loss on tibook)

[Florian E <cenrim@gmail.com>]

Joerg Sommer wrote:
> Hi Michael,
>
> Michael Tautschnig <michael.tautschnig@zt-consulting.com> wrote:
>
> > The last time it happend is a few weeks ago, but at least on my PowerBook6,8 it
> > only happend when the fan had spinning at full speed for some time (due to high
> > CPU usage, so it was ok that the fan was spinning so fast). I considered this
> > a feature of the firmware (?) that did some emergency stop once the fans weren't
> > able to do their job successfully anymore.
>
>
> Yes, now as you say it, I can confirm this for an iBook G4. I had the
> same problem with high CPU load. The fan starts spinning and increase
> its speed until it runs very fast. Then it starts to pulse (increase
> speed -> decrease speed -> inc...) and after a minute or so the iBook
> powers off
...
> $ cat /proc/cpuinfo 
> processor       : 0
> cpu             : 7455, altivec supported
> clock           : 606MHz
> revision        : 0.3 (pvr 8001 0303)
> bogomips        : 610.30
> machine         : PowerBook6,3
> motherboard     : PowerBook6,3 MacRISC3 Power Macintosh
> detected as     : 287 (iBook G4)
> pmac flags      : 0000001b
> L2 cache        : 256K unified
> memory          : 640MB
> pmac-generation : NewWorld
>
> I've run pbbuttonsd and cpufreqd to scale the CPU.

strange...
I'm a gentoo-user and compiling frequently, but my iBook (G4,1.2GHz, got 
it Feb05) never dies on _high_ cpu load.
it happens mostly when I'm typing some stuff in vim or composing 
mails/forum posts, many open rxvts,  running firefox, opera, 
thunderbird, xchat, maybe mpd, but the cpu is still 80%+ idle.
I got the feeling, it's more frequently with some pbbuttonsd versions, 
but I'm not sure... sometimes I try a new kernel release and the system 
powers of three times this day, then runs stable for over a week...
I'm not running a daemon for cpu frequency, setting it manually when I 
need the power.
my current kernel is 2.6.14-gentoo-r2 and I'm running pbbuttonsd 0.7.2.

well, and:
$ cat /proc/cpuinfo
processor	: 0
cpu		: 7447A, altivec supported
clock		: 599MHz
revision	: 0.2 (pvr 8003 0102)
bogomips	: 595.96

total bogomips	: 595.96
machine		: PowerBook6,5
motherboard	: PowerBook6,5 MacRISC3 Power Macintosh
detected as	: 287 (iBook G4)
pmac flags	: 0000001b
L2 cache	: 512K unified
memory		: 768MB
pmac-generation	: NewWorld

greetings, Floh