Issue with Radeon Mobility and suspend on T42 (and other thinkpads)

[thully at umich.edu]

For some time, I have had trouble with my ThinkPad T42 and suspend-to-RAM.
It suspends/resumes fine, but it uses about 5-7% of its battery per hour in
suspend.  I've been conversing w/mjg59 on this topic, and the problem is known
(radeon card isn't powered off properly) - however the solution  has been a bit
tricky.  It can be solved with a kernel patch, but this means using radeonfb
which is a Bad Thing (and not viable as a fix for Ubuntu).  Does anyone else
out there have this problem with this machine?  If so, any chance that you can
look at the solution mjg59 posted at http://www.srcf.ucam.org/~mjg59/radeon/ 
and look at the code for problems (currently, this doesn't work for me).

To enable this, you will need to:
1) Compile the contents of the tarball
2) Move radeontool to /usr/local/bin
3) Add radeontool power off to the end of /etc/acpi/prepare.sh, and radeontool
power on to /etc/acpi/resume.sh right after the #!/bin/bash line

This bug (and the kernel patch for radeonfb) can be found at
http://bugme.osdl.org/show_bug.cgi?id=3022


Tim Hull
thully at umich.edu