Comment 6 for bug 1953671

@Chris - understood. Per my most recent message, running apport-collect triggers the following warning:

"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."

Excuse my noob status, but what should I therefore do?

I honestly thought that by running a kernel installed from https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.14.21/ I would be running an Ubuntu kernel.

Thanks