Re: Upgrade to 12.04: Hangs at boot stage
Is your set-up a direct install, dual with Windows, or with 'Wubi'??
Can you boot from a LiveCD/UISB ??
Usually, " checking battery state " is followed by "[OK}" and is reporting that the check is complete; as a rule, hanging at that point indicates a video driver problem.
Can you get to a Terminal? 'Ctrl_Alt+F1' or 'Ctrl+Alt+t'?
If so, please Post the output of the following:
During the first stage of boot up, following the Bios splash screen, pressing 'Shift' repeatedl, should give you a Grub boot menu with OS options, including recovery modes. [ In 12.10, Recovery is in a sub-menu titled 'Advanced Options'.]
lspci -nnk | grep -iA3 vga
If you get to the recovery menu, choose the 'drop to root shell' option and enter the code above, line by line.
"Better Solutions may bring Worsened Problems": After Lao Tse, b. circa 405BC. a contemporary of Confucius, who died circa 600BC.
They did things differently in those days, apparently!!