Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.20 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20-rc4 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1804592 Title: usb usb2: We don't know the algorithms for LPM for this host, disabling LPM. Status in linux package in Ubuntu: Incomplete Bug description: [ 0.876087] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM. [ 0.876099] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 4.18 [ 0.876100] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 0.876101] usb usb2: Product: xHCI Host Controller [ 0.876102] usb usb2: Manufacturer: Linux 4.18.0-10-generic xhci-hcd [ 0.876103] usb usb2: SerialNumber: 0000:15:00.0 [ 0.876206] hub 2-0:1.0: USB hub found [ 0.876215] hub 2-0:1.0: 4 ports detected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1804592/+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
