Testing with ppa kernel 3.19.8-031908ckt6-generic seems to resolve the issue. At least no more crashes/freezes have occurred since then. I have added the 'kernel-fixed-upstream" tag as requested.
Testing with ppa kernel 3.19.8- 031908ckt6- generic seems to resolve the issue. At least no more crashes/freezes have occurred since then. fixed-upstream" tag as requested.
I have added the 'kernel-