I have the same problem here with a Startech USB drive dock. Description: Ubuntu 13.04
root@JeromeCauca:/sys/bus/pci/drivers/xhci_hcd# uname -a Linux JeromeCauca.ad.cauca.ca 3.10.0-031000rc5-generic #201306082135 SMP Sun Jun 9 01:36:22 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux root@JeromeCauca:/sys/bus/pci/drivers/xhci_hcd# lsusb Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 003 Device 002: ID 046d:c05a Logitech, Inc. Optical Mouse M90 Bus 004 Device 003: ID 152d:0551 JMicron Technology Corp. / JMicron USA Technology Corp. ... root@JeromeCauca:/sys/bus/pci/drivers/xhci_hcd# lspci|grep USB 00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04) 00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) 00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) ... Jun 18 13:31:24 kernel: [143620.514573] scsi 8:0:0:0: Direct-Access WDC WD80 0AAJS-00WAA0 0000 PQ: 0 ANSI: 2 CCS Jun 18 13:31:24 kernel: [143620.514880] sd 8:0:0:0: Attached scsi generic sg2 type 0 Jun 18 13:31:24 kernel: [143620.515094] sd 8:0:0:0: [sdb] 156301488 512-byte logical blocks: (80.0 GB/74.5 GiB) Jun 18 13:31:24 kernel: [143620.515377] sd 8:0:0:0: [sdb] Write Protect is off Jun 18 13:31:24 kernel: [143620.515381] sd 8:0:0:0: [sdb] Mode Sense: 28 00 00 00 Jun 18 13:31:24 kernel: [143620.515666] sd 8:0:0:0: [sdb] No Caching mode page present Jun 18 13:31:24 kernel: [143620.515670] sd 8:0:0:0: [sdb] Assuming drive cache: write through Jun 18 13:31:24 kernel: [143620.516965] sd 8:0:0:0: [sdb] No Caching mode page present Jun 18 13:31:24 kernel: [143620.516968] sd 8:0:0:0: [sdb] Assuming drive cache: write through Jun 18 13:31:29 kernel: [143626.209106] sdb: Jun 18 13:31:29 kernel: [143626.210121] sd 8:0:0:0: [sdb] No Caching mode page present Jun 18 13:31:29 kernel: [143626.210125] sd 8:0:0:0: [sdb] Assuming drive cache: write through Jun 18 13:31:29 kernel: [143626.210128] sd 8:0:0:0: [sdb] Attached SCSI disk Jun 18 13:32:00 kernel: [143657.260276] usb 4-3: Disable of device-initiated U1 failed. Jun 18 13:32:00 kernel: [143657.263761] usb 4-3: Disable of device-initiated U2 failed. Jun 18 13:32:01 kernel: [143657.633372] usb 4-3: reset SuperSpeed USB device number 2 using xhci_hcd Jun 18 13:32:01 kernel: [143657.649978] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88015d980d00 Jun 18 13:32:01 kernel: [143657.649982] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88015d980d40 Jun 18 13:32:01 kernel: [143657.769465] usb 4-3: reset SuperSpeed USB device number 2 using xhci_hcd Jun 18 13:32:01 kernel: [143657.785946] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88015d980d00 Jun 18 13:32:01 kernel: [143657.785950] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88015d980d40 Jun 18 13:32:09 kernel: [143665.311795] usb 4-3: reset SuperSpeed USB device number 2 using xhci_hcd Jun 18 13:32:09 kernel: [143665.328144] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88015d980d00 Jun 18 13:32:09 kernel: [143665.328148] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88015d980d40 ** Changed in: linux (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1154739 Title: xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep eab59c8c To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1154739/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs