Ubuntu 2643-2: Linux kernel regression
Summary
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-3.13.0-55-generic 3.13.0-55.94 linux-image-3.13.0-55-generic-lpae 3.13.0-55.94 linux-image-3.13.0-55-lowlatency 3.13.0-55.94 linux-image-3.13.0-55-powerpc-e500 3.13.0-55.94 linux-image-3.13.0-55-powerpc-e500mc 3.13.0-55.94 linux-image-3.13.0-55-powerpc-smp 3.13.0-55.94 linux-image-3.13.0-55-powerpc64-emb 3.13.0-55.94 linux-image-3.13.0-55-powerpc64-smp 3.13.0-55.94 After a standard system update you need to reboot your computer to make all the necessary changes.
References
https://ubuntu.com/security/notices/USN-2643-2
https://ubuntu.com/security/notices/USN-2643-1
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1465998
Package Information
https://launchpad.net/ubuntu/+source/linux/3.13.0-55.94