I installed ubuntu 12.04 in an Asus 8gbram i7 sharing drive with windows 7.
tried many options as setnomode, ro, ro quiet, deleting msdos6 and replacing it with6 at set root=(hd0,6) was appearing as set root=(hd0,msdos6) at booting time and get crazy try many combinations I realized that the problem is that even the same options get sometimes to boot, sometimes to a purple screen and sometimes to a smtp message and gets freezed there.
in my bios i have uefi disabled as it was by default in this machine.
dmesg for error just this line when im able to boot:
EXT4-fs (sda6): re-mounted. Opts: errors=remount-ro
Also Im quite suprised as i was expecting the installation to go smooth and suddenly menu.lst is deprecated and my knowledge is old.
Anyone facing/faced similar behaviour?
found this answer Inconsistent booting problem 12.04LTS on Asus U46E RAL7 and solved the problem, just turn of vt-d from the BIOS
