@mruffell > Reproduced on the test kernel? The one that I built in the ppa?
Yes 100% sure, took the laptop out of suspend on both kernels. > We need to know what device is plugged into "port 2" of that hub, i.e. "usb 4-2". Can you try determine what the device is? Believe me I've tried. Have identified the function of every other host controller on the system except for the one marked *-usbhost:1 in the attached lshw bus output, which is also the origin of the error. All my inserted devices (USB & Card Reader) appear on the *-usbhost:0 branch. The laptop has a single USB 3.0 port, but when a device is inserted it always appears on the USB 2.0 controller. Even Windows 10 seems to have trouble loading drivers for this, so maybe some hardware wasn't made to spec. If there was something on the system that was actually malfunctioning then I might have more to go on. ** Attachment added: "lshw-usb.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856608/+attachment/5402349/+files/lshw-usb.txt -- 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
