I'm also affected by this bug. I just did a fresh install of Xubuntu 20.04.1 and see the issue.
In my case it's "usb usb2-port1: Cannot enable. Maybe the USB cable is bad?". There are no USB devices connected at all, so I get the bug with only the motherboard root hub present. I can make the log messages to syslog stop by inserting a USB3 device in one of the ports connected to usb2 (a USB2 device connected to the same physical port on the PC gets connected to a different bus so that will not make the log messages stop). Booting Matthew's test kernel (5.4.0-42.46+TEST1856608v20200805b1) makes the bug go away. Booting the regular kernel (in this case 5.4.0-58-generic) and the bug is back. So please revert the git commit on 20.04 (Focal) also until a fix is found. I'll be happy to provide further info if needed. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1856608 Title: [Regression] usb usb2-port2: Cannot enable. Maybe the USB cable is bad? Status in linux package in Ubuntu: Incomplete Status in linux source package in Bionic: Fix Released Status in linux source package in Disco: Fix Released Status in linux source package in Eoan: Fix Released Status in linux source package in Focal: Confirmed Bug description: This appears to be a regression between 4.15.0-70.79 and 4.15.0-72.81. This bug was fixed by simply reverting the offending change. Bug 1859873 tracks root causing the issue and reapplying the change w/ any necessary fixes. [Impact] USB port unusable and boot time takes ~5 minutes longer to complete. Kernel emits messages like: usb usb2-port2: Cannot enable. Maybe the USB cable is bad? [Test Case] dmesg | grep "Cannot enable" [Fix] [Regression Risk] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856608/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
