Public bug reported: The USB3 port of my Samsung Series 9 notebook (NP900X3D) does not work after a suspend/resume cycle. The other USB2 ports work fine.
This problem has appeared between kernel 4.13.0-45-generic (works flawlessly) and 4.15.0-24-generic (fails every time). IIUC there has been a big refactoring of the power management code between these two versions. Trying to plug a USB stick into the USB3 port after a resume leads to the following error being logged in dmesg: [ 345.034905] usb usb2: root hub lost power or was reset [ 345.034912] usb usb3: root hub lost power or was reset [ 345.094619] xhci_hcd 0000:03:00.0: Host took too long to start, waited 16000 microseconds. [ 345.094643] xhci_hcd 0000:03:00.0: PCI post-resume error -19! [ 345.094646] xhci_hcd 0000:03:00.0: HC died; cleaning up [ 345.094651] xhci_hcd 0000:03:00.0: HC died; cleaning up After this error the USB3 port will not work until the system is rebooted. This error is shown only the first time when a USB device is inserted after the resume. In all subsequent tries no messagess will be logged to dmesg. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.15.0-32-generic 4.15.0-32.35~16.04.1 ProcVersionSignature: Ubuntu 4.15.0-32.35~16.04.1-generic 4.15.18 Uname: Linux 4.15.0-32-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 CurrentDesktop: Unity Date: Thu Aug 23 08:56:18 2018 GvfsMonitorLog: Monitoring events. Press Ctrl+C to quit. HotplugNewDevices: HotplugNewMounts: InstallationDate: Installed on 2017-06-24 (424 days ago) InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2) SourcePackage: linux-signed-hwe Symptom: storage UdevMonitorLog: monitor will print the received events for: UDEV - the event which udev sends out after rule processing UdisksMonitorLog: Monitoring the udisks daemon. Press Ctrl+C to exit. 08:56:27.206: The udisks-daemon is running (name-owner :1.75). UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: linux-signed-hwe (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1788557 Title: USB3 port unavailable after suspend/resume (regression) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1788557/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs