Bug 55232 - SMP, apm=power-off freezes, EXT3
SMP, apm=power-off freezes, EXT3
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Arjan van de Ven
Brock Organ
Depends On:
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Reported: 2001-10-27 17:26 EDT by jouni
Modified: 2007-04-18 12:37 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2001-10-27 17:46:38 EDT
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Description jouni 2001-10-27 17:26:36 EDT
Description of problem:
I tried first time to make power off to work on my SMP machine (ASUS
P3C-D, Dual PIII 750MHz, 512 MB RDRAM).  I added apm=power-off to 
When I try to boot the kernel freezes totally after following lines on 

    apm: BIOS version 1.2 Flags 0x03 (Driver version 1.14)
    apm: disabled -APM is not SMP safe (power off active).

This happens both with original and errata 2.4.9 kernel.

Another problem:

When I booted my box after the frozed boot-up, the fsck was the same slow 
check during next boot as with ext2.  (Just double-checked /proc/mounts:  
all ext3.)

Only non-standard procedure during boot was editing the boot command 
inside grub to boot without the apm=...

Best regards,


Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Add apm=power-off to boot command in grub.conf (or lilo.conf)
2. Boot with same hardware as I have..

Actual Results:  kernel freezes

Expected Results:  normal boot.

Additional info:
Comment 1 Arjan van de Ven 2001-10-27 17:46:32 EDT
This looks like your bios is totally broken in this respect ;(

This is not that uncommon, and is the reason poweroff is disabled by default on

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