An o ther observation - when I wake up the laptop mouse doesn't work and I see the following in the log.
[15398.589073] usb 1-1.3: reset high-speed USB device number 3 using ehci-pci [15398.593077] usb 2-1.5: reset full-speed USB device number 3 using ehci-pci [15398.717014] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [15398.725082] ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [15398.737237] ata4.00: configured for UDMA/100 [15398.753197] usb 1-1.5: reset high-speed USB device number 4 using ehci-pci [15398.758008] ata3.00: configured for UDMA/133 [15398.801282] usb 3-2: reset low-speed USB device number 3 using xhci_hcd [15398.801298] xhci_hcd 0000:00:14.0: Setup ERROR: setup context command for slot 2. [15398.801299] usb 3-2: hub failed to enable device, error -22 [15399.061339] usb 3-2: reset low-speed USB device number 3 using xhci_hcd [15399.061351] xhci_hcd 0000:00:14.0: Setup ERROR: setup context command for slot 2. [15399.061352] usb 3-2: hub failed to enable device, error -22 [15399.321558] usb 3-2: reset low-speed USB device number 3 using xhci_hcd [15399.339610] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff880232b741c0 [15399.339635] usb 3-2: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes [15399.342134] PM: resume of devices complete after 966.791 msecs [15399.342683] PM: Finishing wakeup. Then after unplug / plug back I see: [15592.948264] usb 3-2: USB disconnect, device number 3 [15599.437617] usb 3-2: new low-speed USB device number 4 using xhci_hcd [15599.570238] usb 3-2: New USB device found, idVendor=046d, idProduct=c016 [15599.570242] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [15599.570244] usb 3-2: Product: Optical USB Mouse [15599.570246] usb 3-2: Manufacturer: Logitech [15599.570430] usb 3-2: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes [15599.572928] input: Logitech Optical USB Mouse as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/0003:046D:C016.0003/input/input20 [15599.573226] hid-generic 0003:046D:C016.0003: input,hidraw0: USB HID v1.10 Mouse [Logitech Optical USB Mouse] on usb-0000:00:14.0-2/input This does look like kernel issue, right? I'll see if I find out how to reassign this bug. Can I do anything else to help the resolution of this problem? Martin