Mailing List Archived Message #450

From: "Lewis G Rosenthal" <> Full Headers
Undecoded message
Subject: Re: [eCS T60/T61] OT: APM and kernel tyes (was: Re: [eCS T60/T61] Installing rc7 on T61)
Date: Wed, 02 Sep 2009 21:30:18 -0400
To: eCS ThinkPad T60/61 Mailing List <>

On 09/01/09 07:45 pm, Chuck McKinnis thus wrote :
Lewis G Rosenthal wrote:
Hi, Chuck...

On 08/31/09 11:38 pm, Chuck McKinnis thus wrote :
Jon wrote:
On Mon, 31 Aug 2009 19:53:33 -0600 Chuck McKinnis wrote:

If you plan to use SMP, do not install APM.


So IIRC, under advanced install, APM is selected by default and ACPI is not.  Am I correct in understanding you are recommending unselecting APM at this point in the pre-install screen?

Thanks, Jon

Absolutely.  The SMP kernel, which was developed for Warp Server, never expected to be suspended or throttled.  Pasha is working on a patch, but I don't think it is complete yet.

Any idea whether the UNI kernel includes APM support, Chuck, and whether the UNI kernel might be lacking something which ACPI would want in order to enable SMP? I have been running the UNI kernel on my T43 for a long time, APM works, and it suspends (no ACPI!!). I'm just curious as to whether that m8ght fast track the APM support under SMP for the T60/61, T400/500, related systems, and some desktops.


I am not sure if the UNI kernel had the same APM support as the W4 kernel.  It is about 3K less in size.  The SMP kernel is aobut 50K bigger than either of the others.  I am pretty sure most of that is code for supporting multiple processors.  Is the APM support on your T43 the IBM or eCS APM code?  The IBM APM code did not know what ACPI was. However, one of the options for OS2APIC.PSD was /APIC.

I am using APM.SYS:

Signature:       @#IBM:10.156#@ IBM Device Driver for Advanced Power Management
Vendor:          IBM
Revision:        10.156
File Version:    10.156
Description:     IBM Device Driver for Advanced Power Management

I am not using OS2APIC on the T43 (no need; only one core, and AFAIK, this Centrino doesn't hyperthread - and I do not believe that OS2APIC /APIC recognizes hyperthreading, anyway).

Lewis G Rosenthal, CNA, CLP, CLE
Rosenthal & Rosenthal, LLC      
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