[ltp] Sound works until the ThinkPad sleeps for the first time

[Brian Kendig]

When I boot my ThinkPad 600x, sound works fine - *until* I put it to 
sleep and wake it, after which sound will never work again until I 
reboot.  (I get no errors, but I get no sound either.)  I'm using the 
ALSA drivers in the 2.6 kernel.

I've seen reports that this problem is due to a feature in the 600x 
whereby it turns off power to the PCI bus if it senses no devices are 
using it, and ALSA isn't compatible with this.  I tried booting under 
DOS and running "ps2 pcibusp disable" then rebooting into Linux, but 
the problem persists.

Is anybody here using a ThinkPad 600x?  Are you able to continue 
hearing sound after you wake it from sleep?

   - B