It appears you are currently running a mainline kernel. It would be better to report this bug upstream at http://bugzilla.kernel.org/ so that the upstream kernel developers are aware of the issue. If you'd still like to file a bug against the Ubuntu kernel, please boot with an official Ubuntu kernel and re-file. I do not know what this meant last week I updated kernel KDELibs Version 4.13.3 Qt Version 4.8.6 Kernel Version3. 14.5-031405-generic OS Type 64-bit kubuntu Processors 4xIntel Core i5-2520M CPU@2.50GHz Memory 7.7GIB of Ram
When exactly is this message shown and why do you think there is a bug? Did you contact Ubuntu Support about this, as the message clearly mentions an "Ubuntu kernel"?