Help!! Suspend stopped working on T61 laptop

[OGpmpdog]

Hi all,

I dont know where to start in terms of diagnosing/fixing this problem.

I close the lid, and system suspends OK. After opening the lid, the wake-up beep is heard, and the screen tries to illuminate, but nothing happens after this.

The cooling fan doesnt spin, and I can only reboot by powering off/on

I am running 12.04, dualcore CPU, with an ancient Nvidia Quadro graphics card.

This is probably an OS regression - Suspend also stopped working in 10.04.4.

Which log can I view to start troubleshooting?

Thanks ahead of time.

[punkybouy]

Will it suspend properly and come back if you suspend it from the shutdown menu and then close the lid?

[OGpmpdog]

Will it suspend properly and come back if you suspend it from the shutdown menu and then close the lid?

No, in fact I tried that exact method, and still no go.

It seems that everything except the actual powering on after the wake-up is working (the wake-up beep, the HD spinning, the screen trying to illuminate).

Thanks for replying.