I've just installed ubuntu 11.10 on my new Dell and I've had troubles starting. After adding acpi=off to the boot options it at least boots now.
Right now I'm struggling with NVIDIA Optimus. Because I messed my last install up, I completely reinstalled Ubuntu and did the following:
- Downloaded NVIDIA driver (525m) from NVIDIA website & installed it
- Installed ironhide and configured it
Now unity3d isn't working anymore (it worked before the NVIDIA driver) and I can't run optirun because of the missing acpi (that's the error: cat: /sys/class/power_supply/*/online: No such file or directory)
So I'm really stuck right now and I don't really know where the problem is.