I’ve had Ubuntu Dapper (6.06) running on my HP nx6125, and I just updated to the brand new 6.10 version called Edgy Eft. Most things seem to be working just fine, but the monitor never came back to life after suspending the computer. ubuntoforums.org is a good place to start searching when running into bugs like these, and found someone having similar problems. In the nx6125’s case this seems to be the silver bullet:

Edit the /etc/default/acpi-support (sudo getid /etc/default/acpi-support) and set SAVE_VBE_STATE to false.

I’ll update this post if I find other problems running Edgy. The “noapic” parameter doesn’t seem to be necessary anymore by the way.