i have an HP DV5-1115el with an AMD Turion ZM-84 64x2 processor.
on which i had already installed in the past ubuntu 10 on this laptop without any issues.
i've recently formatted it and decided to pass on Ubuntu 12.04 from scratch, at first i had this error when booting from CD:
Kernel panic - not syncing: Fatal Machine Check on current CPU
I quickly solved passing the noapic, acpi=off parameters that i found described in many posts.
It worked flawlessly throught the complete installation until i had to remove the CD and reboot.
When i try to boot now from the main HDD i receive the same kernel panic and errors i had before even if i input the same parameters i gave when installing from CD.
note: im somewhat slightly less than an Ubuntu beginner so i may do wrong on any passage
ps: the full length log is always the same if i give parameters or not
[ 1.172071] [Hardware Error] : CPU 1: Machine Check Exception : 4 Bank 0: b669c00000000135
[ 1.172120] [Hardware Error]: TSC 3ba44a59ea ADDR 373c1ab8
[ 1.172243] [Hardware Error]: Processor 2:200f31 TIME 1362852770 SOCKET 0 APIC 1 microcode 2000057
[ 1.172291] [Hardware Error]: Run the abocve through 'mcelog --ascii'
[ 1.172343] [Hardware Error]: Machine check: invalid
[ 1.172386] [Hardware Error]: Kernel panic - notsyncing: Fatal machine check on current CPU