matjan - the symptoms you describe are the general symptoms of a kernel panic, of which there could be many possible causes. Without being absolutely certain that this is the bug you are experiencing, you should open a new report, providing the information requested at https://wiki.ubuntu.com/KernelTeamBugPolicies
matjan - the symptoms you describe are the general symptoms of a kernel panic, of which there could be many possible causes. Without being absolutely certain that this is the bug you are experiencing, you should open a new report, providing the information requested at https:/ /wiki.ubuntu. com/KernelTeamB ugPolicies