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On Tue, 2009-06-30 at 17:54 +0000, beejunk@gmail.com wrote:<BR>
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On Jun 30, 2009 10:29am, wayne <wayne@jawnee.org> wrote:<BR>
<BR>
> ahoy all,<BR>
> i have been looking into this bug every once in a while (for around 1 year) and have yet to solve it. yes, i am still running Hardy UBS 8.04, as it is reliable and does the job. i am thinking that many of you are in the same boat.<BR>
> <BR>
> i am running 2.6.24-24-rt #1 SMP PREEMPT RT with all the latest Hardy updates/etc. applied on a 1st Generation MacBook Core Duo. the problem is the following kernel panic that happens at least 50% of the time on a restart (either cold boot or hibernate, which basically work the same on the MacBook, in that the boot loader/refit is executed):<BR>
> <BR>
> MP-BIOS bug: 8254 timer not connected to IO-APIC<BR>
> <BR>
> Kernel panic - not syncing: IO-APIC + timer does not work! Boot with apic=debug and send a report. Then try booting with the "noapic" option<BR>
> <BR>
> if no kernel panic occurs, usually the MP-BIOS bug line still appears.<BR>
> <BR>
> i have found a few bug reports and comments on-line, but no solutions have worked for me. it is not the worst bug in the world, but often i boot up from hibernate and then setup instruments/etc. waiting for the long thaw from hibernate. then i return to my computer and see the kernel panic. perhaps someone else has some clues/insights, and we can get the fix in the list archives for others, as it seems Hardy UBS is still the preferred production platform.<BR>
> <BR>
> perhaps the solution is to simply upgrade to 9.04, though seems like there are still some RT issues working themselves out. any experience with UBS 9.04 on a MacBook?<BR>
> <BR>
> peace, w<BR>
> <BR>
<BR>
I can confirm the exact same behavior, on the exact same set-up. Sadly, I've not been able to find any solutions for it, either.<BR>
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thanks for the reply. hopefully someone has an answer....<BR>
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<BR>
I can say that the problem does not exist on Jaunty with a first generation MacBook, which is good. However, the performance of the RT kernel in Jaunty on my set-up was poor, and so I went back to good ol' dependable Hardy. Besides an unusable amount of X-Runs, the RT kernel also constantly had my fans running, which was very annoying, and in a mixing environment also obstructive. At this point I have the feeling that I'll be waiting until Karmic to try again.<BR>
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that is what i heard and why i am avoiding the upgrade for now.<BR>
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<BR>
As for the issues with suspend and hibernation, I've just gotten into the habit of never doing those things. I turn the computer on when I need to record, I just leave it running with a blank screen (with the lid up, of course) during down times, and then shut it down when I'm done. It's a bit inconvenient, but the rest of the performance in Hardy is so solid that I've just accepted the minor hassles.<BR>
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i had problems with suspend/hibernate initially, but the problem was my swap space not being activated (UUID problems in /etc/fstab). other than hibernate taking about 2 minutes to shut down, and 4 minutes to thaw, hibernate 99% works fine, suspend as well.<BR>
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thanks, w<BR>
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