Re: Boot fails on Thinkpad L420 without ACPI=off or nosmp

[Stephen Dunn <nzlbob2332@gmail.com>]

Hi Len, thanks so much for your reply.

In response I can report:
1. System boots fine using noapic option.
2. System fails to boot normally using Fedora with kernel 2.6.38

Thanks
Regards
Steve

On Mon, 07 Nov 2011 13:26:35 Len Brown wrote:
> Hi Steve,
> 
> Thanks for the report.
> 
> > OS Information
> > OS:  Linux 3.1.0-rc9-1-desktop x86_64
> > System:  openSUSE 12.1 RC 1 (x86_64)
> > KDE:  4.7.2 (4.7.2)
> > 
> > Hardware Information
> > Lenovo Thinkpad L420 Model number 78544KM
> > i5-2520M(2.50GHz)
> > Intel HD Graphics
> > 
> > Problem
> > Fails to boot without boot option of either acpi=off, nosmp, or
> > maxcpus=0
> 
> How about simply "noapic"
> 
> or if that fails, then:
> 
> maxcpus=1, noapic
> 
> That should get you up in ACPI mode, but w/ the IOAPIC disabled.
> 
> > Almost immediately freezes. CapsLock does not work and only way to
> > continue is to power off with the power button.
> > 
> > With debug on last line of output reads:
> > ACPI: CE: Look up EC in DSDT
> > 
> > Fails with kernel 3.04 and 3.1 and all distro's I have tried with.
> 
> have you tried any distros that are running a kernel older than 3.04?
> 
> thanks,
> -Len