Hi, This issue happens on Carrizo AMD laptops, only EHCI is affected, XHCI works fine on the same machine. I can see lots of USB wakeup and resume messages showed every two seconds. Plug USB devices to the EHCI port does not change anything. dmesg with ehci-hcd, ehci-pci and usbcore dynamic debug enabled is attached: [ 88.556535] ehci-pci 0000:00:13.0: hcd_pci_runtime_resume: 0 [ 88.556563] usb usb2: usb auto-resume [ 88.556588] hub 2-0:1.0: hub_resume [ 88.556676] usb usb2-port1: status 0507 change 0000 [ 88.556794] hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000 [ 88.556862] usb 2-1: usb auto-resume [ 88.624577] usb 2-1: Waited 0ms for CONNECT [ 88.624585] usb 2-1: finish resume [ 88.624838] hub 2-1:1.0: hub_resume [ 88.624964] usb 2-1-port1: status 0507 change 0000 [ 88.625085] usb 2-1-port2: status 0107 change 0000 [ 88.625354] usb 2-1-port4: status 0507 change 0000 [ 88.625403] hub 2-1:1.0: state 7 ports 4 chg 0000 evt 0000 [ 88.625605] usb 2-1.1: usb auto-resume [ 88.692635] usb 2-1.1: Waited 0ms for CONNECT [ 88.692640] usb 2-1.1: finish resume [ 90.800874] usb 2-1.1: usb auto-suspend, wakeup 1 [ 90.820326] hub 2-1:1.0: hub_suspend [ 90.823161] usb 2-1: usb auto-suspend, wakeup 1 [ 90.840362] hub 2-0:1.0: hub_suspend [ 90.840399] usb usb2: bus auto-suspend, wakeup 1 [ 90.860346] ehci-pci 0000:00:13.0: hcd_pci_runtime_suspend: 0 Thanks.
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dmesg
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