Can you please install and try the following test kernel and verify that it fixes this issue
http://people.canonical.com/~jj/linux-image-3.13.0-24-generic_3.13.0-24.46+lp1306804_amd64.deb http://people.canonical.com/~jj/linux-image-extra-3.13.0-24-generic_3.13.0-24.46+lp1306804_amd64.deb
Can you please install and try the following test kernel and verify that it fixes this issue
http:// people. canonical. com/~jj/ linux-image- 3.13.0- 24-generic_ 3.13.0- 24.46+lp1306804 _amd64. deb people. canonical. com/~jj/ linux-image- extra-3. 13.0-24- generic_ 3.13.0- 24.46+lp1306804 _amd64. deb
http://