Ubuntu text mode boot

1.Modify /etc/default/grub. Add "text' at GRUB_CMDLINE_LINUX_DEFAULT as following

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash text"

2.run update-grub

>sudo update-grub

3.reboot

Then you could get the text mode boot.

To start window, run startx after login.

>startx

To disable ACPI, modify /boot/grub/grub.cfg. Add "acpi=off" in the boot command line as following

menuentry 'Ubuntu, with Linux 4.3.0' --class ubuntu --class gnu-linux --class gnu --class os {        recordfail        gfxmode $linux_gfx_mode        insmod gzio        insmod part_msdos        insmod ext2        set root='(hd0,msdos1)'        search --no-floppy --fs-uuid --set=root e6896cc6-d528-4b88-9c56-69921f2e3378        linux   /boot/vmlinuz-4.3.0 root=UUID=e6896cc6-d528-4b88-9c56-69921f2e3378 ro   quiet splash text $vt_handoff <span style="color:#FF0000;">acpi=off</span>        initrd  /boot/initrd.img-4.3.0}