I can confirm this issue in 20.04 linux-image-5.4.0-42. This message only appear for my usb3.1 gen1 type-c hub when it is connected on boot. If I re-plug the hub after boot, the message stops. It doesn't appear for another connected usb3 type-a hub.
In /var/log/syslog, it prints every 4 seconds: Aug 3 01:57:37 fox kernel: [ 6020.600964] usb usb2-port2: Cannot enable. Maybe the USB cable is bad? Aug 3 01:57:41 fox kernel: [ 6024.672925] usb usb2-port2: Cannot enable. Maybe the USB cable is bad? Aug 3 01:57:45 fox kernel: [ 6028.744888] usb usb2-port2: Cannot enable. Maybe the USB cable is bad? Aug 3 01:57:49 fox kernel: [ 6032.816854] usb usb2-port2: Cannot enable. Maybe the USB cable is bad? -- 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: Incomplete 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
