Comment 29 for bug 54020

A quick update

I can still only boot the Samsung R560 with AMD64 if I use the acpi=off
boot parameter (only using this one at the moment, I do try it without
after each new update).

I have applied all the patches and updates that come down from the usual
ubuntu amd64 repositories and the problem remains very much present.

Side effects are:-

Ubuntu cannot detect the power state of the Laptop and always show it as AC
powered even when it is'nt.

Changing anything that might cause power state change notifications
immediately reboots the PC for example.

If you start the laptop on battery then plug in AC power, bosh....
If you start the laptop on AC power then unplug the AC power to move the
laptop, bosh....
If you try to use any of the Laptop special function keys (screen
brightnes, external monitor etc), bosh....

Use the laptop on battery and you risk it failing on you without notice.

Boot up also randomly crashes, or repeatedly sounds the console bell
(beeps) for an extended period until a loading driver initializes something
and it stops. (a right royal pain booting up a laptop in a silent study
area)

All in all extremely disappointing for laptop users with samsung 64 bit
laptops who want to run 64 bit Ubuntu Intrepid.