[ltp] ACPI S3 power drain: possible solution

[James McKenzie]

Volker Braun wrote:
> Hello everyone,
> 
> Please help us test the radeon powermanagement patch. This is supposed
> to solve the "S3: high power consumption" bug detailed in
> http://bugzilla.kernel.org/show_bug.cgi?id=3022
> 
> If you do not want to hunt down the individual patches from the
> bugzilla entry, then there are two ways to test. First, if you happen
> to use Fedora Core 3 on a thinkpad T4x series, then there are
> precompiled kernel rpms. The following kernel has all the necessary
> patches (and software-suspend-2) applied
> 
> http://carrot.hep.upenn.edu/~vbraun/kernel-T4x/test/kernel-DANGEROUS-T4x-2.6.11-8.i386.rpm
> 
> Install it, and run (as root) /usr/bin/thinkpad-T4x-suspend. This
> script will suspend your computer and log the battery drain to
> /var/log/battery.log. The "DANGEROUS" refers to the fact that this
> kernel suspends the radeon chip to D2 sleep, and we are not sure
> whether this works with all revisions of the hardware. 
> 
> If your computer hangs during resume, please try 
> 
> http://carrot.hep.upenn.edu/~vbraun/kernel-T4x/test/kernel-T4x-2.6.11-8.i386.rpm
> 
> This is almost the same kernel, but sends the radeon to D2 sleep only
> on models where it is known to work. Now, you should definitely be
> able to suspend/resume, but you may suffer of the battery drain bug
> during sleep.
> 
> If you do not use Fedora Core 3 or have different hardware, you can
> also compile a kernel yourself. First, get the vanilla 2.6.10 kernel
> sources. Then apply
> 
> http://carrot.hep.upenn.edu/~vbraun/kernel-T4x/i386/patch-2.6.11-rc2-radeonfb-D2.patch.bz2

Volker:

Where do I send logs for my system.  It seems that an A22p is affected 
by the 'drain' bug.

James McKenzie