- # https://askubuntu.com/questions/33416/how-do-i-disable-the-boot-splash-screen-and-only-show-kernel-and-boot-text-inst
- # it suggests not having plymouth-theme-ubuntu-text, but
- # making it not installed then kills plymouth, then makes
- # the system not boot.
- sed -ri 's/(^ *GRUB_CMDLINE_LINUX.*)quiet splash/\1/' /etc/default/grub
- # on xenial, no grub is displayed at all. fix that.
- # found just by noticing this in the config file, and a
- # warning about it in error.log
- sed -i '/^ *GRUB_HIDDEN_TIMEOUT/d' /etc/default/grub
-
- update-grub2
+# https://askubuntu.com/questions/33416/how-do-i-disable-the-boot-splash-screen-and-only-show-kernel-and-boot-text-inst
+# it suggests not having plymouth-theme-ubuntu-text, but
+# making it not installed then kills plymouth, then makes
+# the system not boot.
+sed -ri 's/(^ *GRUB_CMDLINE_LINUX.*)quiet splash/\1/' /etc/default/grub
+
+# todo: not sure, but this might screw up systems without a serial port
+# and thus need a conditional.
+sed -ri 's/^ *GRUB_CMDLINE_LINUX_DEFAULT="/\0console=ttyS0,115200 console=tty0 /' /etc/default/grub
+# on xenial, no grub is displayed at all. fix that.
+# found just by noticing this in the config file, and a
+# warning about it in error.log
+sed -i '/^ *GRUB_HIDDEN_TIMEOUT/d' /etc/default/grub
+
+update-grub2