I have Ubuntu 14.40 installed on an Asus 64 bit desktop machine, and it was working well. However, in the last couple of days the system upgraded the Kernel from 3.13.0-24 to 3.13.0-27.
The machine now fails to boot, and crashes just after the purple screen appears. It drops into a static text screen which seems to show that a number of modlues have loaded, but then something happens just after that and the system is crashed.
If I switch off and then start the machine again I get a screen offering ubuntu advanced options. If I select the advanced option, and then select to boot using Kernel 3.13.0-24, the machine boots normally.
Is there something that I have to do to get Kernel 3.13.0-27 to work?
In the mean time how can I make Kernel 3.13.0-24 the default boot option so that I don't have to switch the machine off and on again to get into the advanced options?