http://bugzilla.kernel.org/show_bug.cgi?id=10377
Summary: Kernel freezes during boot when AC is unplugged
Product: ACPI
Version: 2.5
KernelVersion: 2.6.25-rc8
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: Power-Processor
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Latest working kernel version:2.6.24.4
Earliest failing kernel version: 2.6.25-rc1
Distribution: Gentoo
Hardware Environment: NB Asus A6JC
2x Genuine Intel(R) CPU T2300 @ 1.66GHz
Software Environment: gcc 4.2.3
Problem Description:
Kernel freezes during boot if AC is unplugged. I doesn't freeze every time but
very often. It freezes after this two lines:
Apr 2 00:46:15 kedgecomp ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma
0xffa0 irq 14
Apr 2 00:46:15 kedgecomp ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma
0xffa8 irq 15
If I boot with debug parameter then it prints one more line and then freezes.
Apr 2 00:46:15 kedgecomp Switched to high resolution mode on CPU 1
If kernel is compiled without CONFIG_CPU_IDLE then it boots.
I've also tried to revert
http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=9a0b841586c3c6c846effdbe75885c2ebc0031b0
or boot with processor.max_cstate=1 as Venkatesh Pallipadi suggested in bug
10093, but it didn't help
Also if it doesn't freeze during boot with unplugged AC then it often
freezes when Gentoo prints "Setting system clock using the hardware clock UTC"
the clock script uses "/sbin/hwclock"
Any suggestions how to fix it?
Regards,
Roman
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