Thanks for your advice, Christopher.
I've just done the BIOS update and tested booting.
With the 3.13.0-45 and 3.13.0-46 kernel:
The backlight turns off (as normal boot process) and on with some oddly
scrambled lines,
then the screen generally becomes white. While the screen whiting out, the log
in drum rings.
With the 3.13.0-44 kernel, my laptop boots successfully.
The output of the dmidecode commands:
X200MA.504
11/13/2014
Thanks.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1416849
Title:
Booted into blank screen after the security update
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