I've seen on Bugzilla bug request for enhancements, is there anything similar for Launchpad?
Ubuntu – How to file feature request bugs on Launchpad
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So, in the example you've supplied, the bug is filed against the kernel package for the Ubuntu operating system. You can tell this by looking at the package listed under the 'Affects' block. In this case, it is linux(ubuntu) so it is distro specific.
Depending on how it is filed, a bug may not get the attention it needs. If it was filed against the 'Linux' project, then it is important to note that this is used as an upstream bug tracker for bugs against related distributions.
If this bug was something that you wanted to be addressed by upstream Linux maintainers, then really the only thing you can do is file it on bugzilla.kernel.org. The site being the bugtracker that Linus and the maintainers use to address kernel issues.
In this case, the Kernel Defect Analyst(me :-) ) would triage your bug and bring it to the attention of the Kernel Release Manager. S/He would then determine whether it needed an Engineer's involvement (this is somewhat ambiguous as the KRM is an Engineer in his/her own right so it may be worked by them as well). At that time it will be acted upon.
It is important to note that not all bugs get actively worked. In the vast majority of cases bugs are left alone if there is work ongoing upstream. If you are aware of the bug upstream, then filing a bug against Ubuntu in launchpad is an important way for us to track the issues as they progress in the upstream kernel. This would be accomplished by adding that upstream watch I mentioned earlier.
Hope that helps you a bit. Let me know if you'd like some clarification of any of the above.
As a member of Bug Control, I've had to work with these private bugs on occasion. There is a specific policy on handling private bugs, and checking for specific information.
For crash bugs, the general thing you have to look for in the private bugs are core dumps and any stacktraces that may be on the bug. If a core dump is attached, remove it. If there's stacktraces attached, look through them and identify any possibly private data in the stack trace. If there looks to be private data, then what you have to do is download the stacktrace, edit out the private data, upload the edited version, then remove the old version.
As well, find any other Personally Identifiable Information, or private information, such as social security numbers, account numbers, passwords, etc., and try and edit those out as well.
For other private bugs, it depends, since there are separate policies for private security bugs which I am not privy to as those are handled by the Security team, and it likely would only be "Private Security" marked if the bug was legitimately a security risk that they could not publicize the information for.
There can also be private bugs that are not against the Ubuntu packages but are against other projects on Launchpad (i.e. not the Ubuntu project or an Ubuntu package). For those bugs, the managers of that project will be setting forth the policies for those bugs.
Additional information on how to triage Apport crash reports and other private bugs in Ubuntu can be found on the Ubuntu Wiki, in the How to Triage guide, as part of the Bug Squad's knowledge base. The link will automatically point you to the "Apport reports" section, however for the most up to date information on triage guidelines you should refer to that wiki document.
Best Answer
You can file a bug for small issues but a member of the QA team will have to set the importance to 'wishlist'.
For bigger features, if you have the expertise and time to write a blueprint then you should enter it on https://blueprints.launchpad.net/ You should make sure that you can fill it out in enough detail for a developer to start work, and also the perseverance to bring it to the attention of someone to do the work if you can't do it yourself.