[ltp] Suspend to Disk - Kenrel 2.6.4 vs. r50p

[hamish]

I have an r50p and runnign debian unstable with kernel 2.6.4, compiled 
from scratch using the source from kernel.org, no patching (i.e. for 
swsusp etc).

Most things work fine (2.6.5 broke USB for me, so I'm still at 2.6.4), 
but I want suspend to disk (or suspend to RAM for that matter) to work.

But.

echo -n disk > /proc/power/state

results in the (Correct?) text screen that says it's going to do the 
suspend etc... But then just wakes straight up. here's the logs from 
kern.log

Apr 29 06:44:12 ballbreaker kernel: Stopping tasks: 
=======================================================================|
Apr 29 06:44:12 ballbreaker kernel: Freeing memory: 
.......................................|
Apr 29 06:44:12 ballbreaker kernel: hdc: start_power_step(step: 0)
Apr 29 06:44:12 ballbreaker kernel: hdc: completing PM request, suspend
Apr 29 06:44:12 ballbreaker kernel: hda: start_power_step(step: 0)
Apr 29 06:44:12 ballbreaker kernel: hda: start_power_step(step: 1)
Apr 29 06:44:12 ballbreaker kernel: hda: complete_power_step(step: 1, 
stat: 50, err: 0)
Apr 29 06:44:12 ballbreaker kernel: hda: completing PM request, suspend
Apr 29 06:44:12 ballbreaker kernel: PM: Attempting to suspend to disk.
Apr 29 06:44:12 ballbreaker kernel: PM: snapshotting memory.
Apr 29 06:44:12 ballbreaker kernel: PCI: Setting latency timer of device 
0000:00:1d.0 to 64
Apr 29 06:44:12 ballbreaker kernel: PCI: Setting latency timer of device 
0000:00:1d.1 to 64
Apr 29 06:44:12 ballbreaker kernel: PCI: Setting latency timer of device 
0000:00:1d.2 to 64
Apr 29 06:44:13 ballbreaker kernel: PCI: Setting latency timer of device 
0000:00:1f.5 to 64
Apr 29 06:44:13 ballbreaker kernel: hda: Wakeup request inited, waiting 
for !BSY...
Apr 29 06:44:13 ballbreaker kernel: hda: start_power_step(step: 1000)
Apr 29 06:44:13 ballbreaker kernel: blk: queue de7f5df8, I/O limit 
4095Mb (mask 0xffffffff)
Apr 29 06:44:13 ballbreaker kernel: hda: completing PM request, resume
Apr 29 06:44:13 ballbreaker kernel: hdc: Wakeup request inited, waiting 
for !BSY...
Apr 29 06:44:13 ballbreaker kernel: hdc: start_power_step(step: 1000)
Apr 29 06:44:13 ballbreaker kernel: hdc: completing PM request, resume
Apr 29 06:44:13 ballbreaker kernel: Restarting tasks... done


Anyone know why it doesn't actually power off? Info on this phenomenon 
seems to be a bit sparse, but there seems to be a few people reporting 
it on various laptops...

What is the story on suspend to disk anyway? Should we use the kernel 
code? swsusp patches & resume2? pmdisk patches?  Damnit I just want it 
to work... I'd even use straight FN-F4 except my video won't wake up 
afterwards... Currently I have to reboot several times a day (i.e. 
whenever I want to move my thinkpad from one place to another). very 
frustrating...

TIA
  hamish.