Comment 3 for bug 1425304

When I run the 3.16 kernel in 14.04.2, both monitors on my dual monitor setup shut down with loss of signal until the system comes to the Unity login screen. When I run either 3.13 or 3.14 kernels there is no problem.

I have found that commenting out lines in the /etc/grub.d/10_lupin file and setting vt_handoff=1 to vt_handoff=0 in the /etc/grub.d/10_linux file will allow the plymouth screen to display properly on a 3.16 kernel.

Whatever the 3.16 kernels do differently seems to prevent the plymouth screen from displaying on boot unless vt_handoff is disabled in a file (two files if the user is running Ubuntu in a Wubi install).

The relevant lines in the /etc/grub.d/10_lupin file to disable by commenting them out are as follows:

#for word in $GRUB_CMDLINE_LINUX_DEFAULT; do
# if [ "$word" = splash ]; then
# GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT \$vt_handoff"
# fi
#done

After that, plymouth displays correctly every bootup.