- If your downstream bug report on Launchpad has been marked Triaged, and a Ubuntu community member asked you to read this, thank you for doing so! By reading and following this completely, you are maximizing the speed with which your bug will be fixed. Please take care to read every step carefully.
First step: Prepare the Kernel.org format information
Note the below Kernel.org format was taken directly from upstream.
Please ensure you follow the below format word for word. Just because you tested the latest mainline kernel, may have bisected a kernel regression, or others say they are experiencing the same problem, doesn't mean you should omit anything. Providing this information is vital for a developer to fix your problem, and to maximize the chance of your bug being addressed.
Please take care that when you provide the below information, check once again that you are booted into the newest available upstream mainline kernel only. Folks have had their bug marked Triaged, sent their e-mail, but had a newer kernel release come out without them realizing this. Hence, if upstream didn't ignore your report altogether, they will ask you to test this in the newest release that just came out and you didn't check for. Failure to do this will have negative unintended consequences. The Ubuntu kernel is the Ubuntu Community's responsibility, the upstream mainline kernel is the Kernel.org Community's responsibility, of which Ubuntu is a part of.
For input problems only
For reports that would normally be sent to the linux-input mailing list, as requested by the maintainer, please do not send any of the information from section [7.] through [7.7] below.
Second step: E-Mail the maintainer mailing list with Kernel.org format
Now that you have prepared the Kernel.org format information, the next step is identifying the proper upstream mailing list to e-mail your problem to, and how to do it.
Please note, when e-mailing a maintainer mailing list, do so in plain text, not html. Otherwise, it will be flagged as SPAM, and silently discarded without notification to you. For more on this and other reasons your post would be flagged as SPAM, please see here.
- Do not post any of the Kernel.org information as an attachment when e-mailing a maintainer mailing list. Instead, provide the information word for word in the body of your e-mail.
Please ensure you e-mail all maintainers of the driver in the TO: field, and CC the mailing list. The author of the driver (which may or may not be the current maintainer) may be found via a terminal:
modinfo DRIVERWhere DRIVER is the name of the kernel driver. It would be acceptable to also put the author in the TO: field of your email.
- If this is a regression, also put the submitter of the regression commit in the TO: field.
Please ensure you post in your Launchpad report a URL of your e-mail from the mailing list found from the mailing list archives. It can take a day or two for the e-mail to show up to the respective archive.
Reporting non-WiFi USB bugs upstream
First, please note that for non-WiFi USB bugs, the USB maintainer(s) do not want anyone to create an upstream bug report. For more on this, please see this upstream report comment. If you do open an upstream report anyways, it will be immediately closed, and cause negative unintended consequences. Instead, please send an e-mail to the maintainer(s), and CC the email@example.com mailing list.
Reporting Graphics card driver bugs
- The following graphics card driver bugs are submitted to the respective bug tracker below:
Reporting all other bug types
A list of all kernel drivers and their maintainers may be found here. One may send an e-mail to the maintainer(s), and CC the mailing list indicated by the 'L:'. If no list is specified, send an e-mail directly to the maintainer(s). However, if your driver isn't listed, or if you aren't sure which maintainer(s) and list to send to, here are some helpful suggestions:
Touchpad or clickpad doesn't work at all - E-mail the maintainer(s) and CC firstname.lastname@example.org.
Third step: No response from maintainer mailing list
If no response has been received within a week from your e-mail to the appropriate mailing list, and the issue is still reproducible with the latest mainline kernel available, then if the issue is related to:
Intel graphics driver bugs - Please report to https://01.org/linuxgraphics/documentation/how-report-bugs.
- All others - You would want to send a follow up e-mail to the mailing list with the updated kernel testing results, and further verbose debugging.
Negative unintended consequences
- If you contact upstream, please follow the Kernel.org format created by Kernel.org developers. Failure to follow these directions exactly as shown may have the following negative unintended consequences:
- May likely result in your bug requiring upstream developers to ask unnecessary follow up questions that should have been provided in the first place.
- May likely result in your bug being promptly ignored by the kernel maintainer, sub-maintainer, or community developer(s) responsible to fix your kernel bug.
May create friction between you, the Ubuntu Community, and the kernel.org developers, which is not very Ubuntu.