Re: Fatal trap 12 during bootup on Dell Cpt with acpi enabled

[LordYoukai <lordyoukai@xxxxxxxxx>]

Disabling cpu_cst seems to have alleviated the panic issue. There is 
still the issue of a long wait at bootup after the discovery of kbd0 but 
it did boot.

On 3/11/2010 9:13 PM, YONETANI Tomokazu wrote:
> On Tue, Mar 09, 2010 at 03:50:34PM -0800, LordYoukai wrote:
> > current process = Idle
> > current thread = pri 12
> > kernel: type 12 trap, code = 2
> > Stopped at AcpiReadBitRegister+0x46:   movl %eax,0(%edx)
>
> Since the current process is Idle and it's crashing somewhere in
> AcpiReadBitRegister(), I guess that the caller is probably acpi_cpu_idle().
> You can turn off part of ACPI subdrivers by setting boot loader variable
> (you can find the names of other subdrivers in acpi(4)):
>    set debug.acpi.disabled="cpu_cst"
>
> and see if it still panics.
>
> Alternatively, if you can modify the acpi code and reinstall the driver,
> the following procedure may or may not fix the issue.
>
> $ cd /sys/dev/acpica5
> (if you don't have write access on /usr/obj, you need to set
>   an environment variable MAKEOBJDIRPREFIX to somewhere else
>   where you do)
> $ make obj&&  make depend
> $ sed -i.bak 's/cpu_quirks;/cpu_quirks = CPU_QUIRK_NO_BM_CTRL;/' acpi_cpu_cstate.c&&  make
> (see if there's no compilation errors, and ...)
> $ su root -c 'make install'
>
> Cheers.