Having recently installed ubuntu 11.10 on a new computer after approximately a week of use I experienced a freeze on start-up. I think some updates where installed on previous session but I can't remember for sure.
Rebooting the without splash screen I receive two errors
Stopping automatic crash report generation [fail]
which seems to be unimportant according to a quick google.
Starting lightDM display manager [Fail]
Heading to the console dmesg gives me these two messages of interest next to each other.
vboxpci:10 MMu not found (Not registered) init: lightdm main process terminated
google suggests to me that this is the kernel checking if my motherboard has iommu, which I guess is used in virtual machines, guessing from google results. (for reference its a Gigabyte H67 usb3 B3). Trying to start lightdm again from command line does not help, same results.
I'm stuck, why is lightDM requiring a virtual machine? Or maybe the two lines are not related and I am missinterpreting? What's going on? Any suggestions to help me to get my system to reboot.
dmesg gives me one more error right at the bottom
init: plymouth stop pre start process terminated with status 1
but I think this may be because I went in to grub and removed splash from the startup options so I could see any errors.