UBS Hardy 8.04 RT kernel panic...

wayne wayne at
Tue Jun 30 16:29:19 BST 2009

ahoy all,

    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.

    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):

MP-BIOS bug: 8254 timer not connected to IO-APIC
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

if no kernel panic occurs, usually the MP-BIOS bug line still appears.

    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.

    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?

peace, w

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