usplash shows the coloured lines at exactly the same time as the CIFS error messages are shown in shutdown.
Taking splash out of the kernel boot line in the grub list file removes the graphical element of shutdown/startup and causes the CIFS error line to appear (rather than being hidden by usplash) - It doesn't fix this bug but at least the risk of damage to my screen is reduced.
This bug is causing usplash to crap-out on shutdown and display a nice screen of vertical coloured lines, as reported in this bug: /bugs.launchpad .net/ubuntu/ +source/ usplash/ +bug/301628
https:/
usplash shows the coloured lines at exactly the same time as the CIFS error messages are shown in shutdown.
Taking splash out of the kernel boot line in the grub list file removes the graphical element of shutdown/startup and causes the CIFS error line to appear (rather than being hidden by usplash) - It doesn't fix this bug but at least the risk of damage to my screen is reduced.