Comment 11 for bug 1956849

Hi @dgatwood, @jazzzz,

The test kernels have finished building and are ready for you to try.

Like I said before, they are 5.11.0-44-generic for Focal HWE and Hirsute, and 5.13.0-23-generic for Impish, with just the one commit reverted:

commit 5caa90d5fedfcdf57a42c272896cfd0ef6b5c667
commit-upstream: 5255660b208aebfdb71d574f3952cf48392f4306
Author: Jonathan Bell <email address hidden>
Date: Fri Oct 8 12:25:44 2021 +0300
Subject: xhci: add quirk for host controllers that don't update endpoint DCS
Link: https://github.com/torvalds/linux/commit/5255660b208aebfdb71d574f3952cf48392f4306

Let's see if this is the commit which is causing you issues. Could you please install a test kernel and let me know if your USB ports work again?

Please note, these test packages are NOT SUPPORTED by Canonical and are for TEST PURPOSES ONLY. ONLY install in a dedicated test environment.

Instructions to install:
1) sudo add-apt-repository ppa:mruffell/lp1956849-test
2) sudo apt update

For Focal HWE and Hirsute users:
3) sudo apt install linux-image-unsigned-5.11.0-44-generic linux-modules-5.11.0-44-generic linux-modules-extra-5.11.0-44-generic linux-headers-5.11.0-44-generic
For Impish users:
3) sudo apt install linux-image-unsigned-5.13.0-23-generic linux-modules-5.13.0-23-generic linux-modules-extra-5.13.0-23-generic linux-headers-5.13.0-23-generic

4) sudo reboot
5) uname -rv
Focal:
5.11.0-44-generic #48~20.04.2+TEST1956849v20220112b1-Ubuntu SMP Wed Jan 12 02:26:0
Hirsute:
5.11.0-44-generic #48+TEST1956849v20220112b1-Ubuntu SMP Wed Jan 12 02:31:07 UTC 20
Impish:
5.13.0-23-generic #23+TEST1956849v20220112b1-Ubuntu SMP Wed Jan 12 02:37:08 UTC 20

If you are asked to abort the current kernel removal, say no.

You may need to change your grub config to boot the correct kernel. You can follow these instructions to do that: https://paste.ubuntu.com/p/WGpCWTPyTj/

Please make sure the uname is correct on boot. Sometimes newer kernels get pulled in due to metapackage dependencies not liking the linux-image-unsigned package.

Let me know if your USB ports start to work again. If they do, we can revert the commit in the Ubuntu kernels, and go and report the issue upstream and get it fixed. If it doesn't, then we will need to do some more tests to try find the commit which introduced the regression.

Thanks,
Matthew