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iBook G4: Seemingly random lockups
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ehuber
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Joined: 26 Mar 2005
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Location: Pittsburgh, PA, USA

PostPosted: Sat Mar 26, 2005 11:19 pm    Post subject: iBook G4: Seemingly random lockups Reply with quote

Hello,

I purchased a new iBook G4 12" online and as soon as it arrived, installed gentoo on it. After some initial confusion, I thought I had a perfectly working system. All devices working, sleep working, but Airport Extreme not (oh well). However, I soon started experiencing what seemed like random lockups after about 2-3 hours, often when I'm doing something that involves the drives (looking through directories, copying large files) and occaissionally when just using mplayer. I tried the following kernels:

2.6.9-r9
2.6.10-r6
2.6.11-r3

All of them result in the same locking problem. I also tried disabling cpudyn (although I haven't tried disabling pbbuttons). In short, I don't know where to point my finger next. I had an experienced friend look over my system configuration and he couldn't find anything outright wrong with it. Could I have some pointers? What is often a cause for such lockups in gentoo?

(PS... I also tried clocking the CPU down from 1.2 GHz to 600Mhz. This did not prevent lockups, however)
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JoseJX
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Joined: 28 Apr 2002
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PostPosted: Sun Mar 27, 2005 9:24 am    Post subject: Reply with quote

A few things possibly:

1. If you have preempt enabled in your kernel, turn it off.
2. There are some reports of pbbuttonsd-0.6.8 locking up on newer machines
3. Can you ssh into the machine after it locks up, or is it completely locked?
4. Anything interesting in your kernel logs?
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Cenrim
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Joined: 04 Dec 2004
Posts: 142
Location: Germany

PostPosted: Sun Mar 27, 2005 4:52 pm    Post subject: Reply with quote

got a similar prob
ca 30minutes ago me iBook locked up completly...
it didn't pong, nmap said "host seems down"

exactly the same kernel ran for 4 day and 7 hours without probs...
kay, half of the time was "snooze", but nearly half of the real uptime was compiling

hmmm... maybe it's pbbuttonsd, i did a emerge -avuD world 2 days ago and had trouble some trouble with pbbuttonsd thereafter...
it did not react after snooze, so I simply stopped it everytime like..
Code:
 /etc/init.d/pbbuttonsd stop; snooze; /etc/init.d/pbbuttonsd stop


*SIGH*

just did a downgrade to 0.6.7 (stopped it before ;))
maybe this will work...

now I'll try to chill and maybe this will make my english a little bit better ;)
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l33tmmx
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Joined: 12 Mar 2005
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Location: Pirkkala, Finland

PostPosted: Sun Mar 27, 2005 7:21 pm    Post subject: Reply with quote

I did upgrade to pbbuttonsd-0.6.8 a day or two ago, and during the last few hours got three sudden lock-ups :? After reading this thread I downgraded to 0.6.7, so far all's well 8)

All this on Apple iBook G4 1,2GHz.
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ehuber
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Joined: 26 Mar 2005
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PostPosted: Sun Mar 27, 2005 8:40 pm    Post subject: Reply with quote

JoseJX, thank you for your advice -- I've disabled the preemptive kernel and recompiled; up to now I haven't had a freeze. But I won't really know whether this has solved the problem until I put the laptop on high stress, which will probably happen sometime today. I will definitely post here with a confirmation if this disabling of the preemptive features has permanently fixed the problem.
I have always been running pbbuttons 0.6.6, so I factored that out...

thanks for all the follow-ups, guys !
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Cenrim
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Joined: 04 Dec 2004
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PostPosted: Sun Mar 27, 2005 10:53 pm    Post subject: Reply with quote

now with downgraded pbbuttonsd (0.6.8 to 0.6.7) my iBook runs since 6 hours without any probs..

THX JoseJX for the advice!
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l33tmmx
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PostPosted: Mon Mar 28, 2005 7:09 am    Post subject: Reply with quote

BTW, maybe the 'do-not-use-preemptive-kernel'-issue should be mentioned somewhere in the PPC-FAQ or PPC-Handbook? I made the mistake of using it originally (it has worked faultlessly on my x86 machines), but 3-4 days ago I started getting all kinds of strange segfaults, even on gcc, so with the aid of LiveCD I had to recompile my kernel without preempt support.
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ehuber
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PostPosted: Mon Mar 28, 2005 7:13 pm    Post subject: Reply with quote

Hello,

my problem has not yet gone away, unfortunately. I had an uptime of a whole day after I recompiled the kernel without preempt support, but then this morning I went to check for something online and it froze again. I was running mplayer and firefox, and when I tried to do tab completion in another window it froze.

Is there any files that may be of help for diagnosing this problem?
And how can I get the kernel log?

Thanks in advance,
Edmund Huber
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ehuber
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PostPosted: Thu Mar 31, 2005 3:00 am    Post subject: Reply with quote

*bump* (I don't know if gentoo forums like bumping)

I had another freeze today, while doing something in Firefox.

Is there some other reason why I may be freezing? I disabled the preemptive kernel already..
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brenden
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Joined: 09 Mar 2004
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Location: Calgary, AB

PostPosted: Sat Apr 02, 2005 1:09 am    Post subject: Reply with quote

probably overheating. are you using it sitting flat on a desk? or is it on something soft? it may not be getting proper air flow.
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