Same problem here. I have a Vantec 2-Port SuperSpeed USB 3.0 ExpressCard 34 connected to an external hard drive. My computer is a Lenovo T61p running Ubuntu 11.04 with kernel Linux 2.6.38-8-generic x86_64. The external hard drive gets unmounted and mounted back randomly. This issue happens often (every 10 minutes or so).
The hard drive works fine when it is connected to an USB 2.0 port. The same thing happens with another express card (AKE 5Gbps BC618T 54mm 2 Port USB 3.0). This comes from the kernel ring buffer (dmesg): [13673.999804] xhci_hcd 0000:05:00.0: WARN: transfer error on endpoint [13673.999837] usb 8-1: USB disconnect, address 3 [13674.000221] sd 6:0:0:0: [sdb] Unhandled error code [13674.000224] sd 6:0:0:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK [13674.000228] sd 6:0:0:0: [sdb] CDB: Read(10): 28 00 00 95 c7 f8 00 00 f0 00 [13674.000237] end_request: I/O error, dev sdb, sector 9816056 [13674.000254] sd 6:0:0:0: [sdb] Unhandled error code [13674.000256] sd 6:0:0:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK [13674.000259] sd 6:0:0:0: [sdb] CDB: Read(10): 28 00 00 95 c8 e8 00 00 10 00 [13674.000266] end_request: I/O error, dev sdb, sector 9816296 [13674.031772] JBD2: Detected IO errors while flushing file data on sdb1-8 [13674.031787] Aborting journal on device sdb1-8. [13674.031800] EXT4-fs error (device sdb1) in ext4_reserve_inode_write:5620: Journal has aborted [13674.031806] EXT4-fs (sdb1): previous I/O error to superblock detected [13674.031808] JBD2: I/O error detected when updating journal superblock for sdb1-8. [13674.031819] journal commit I/O error [13674.040187] EXT4-fs error (device sdb1) in ext4_dirty_inode:5747: Journal has aborted [13674.040191] EXT4-fs (sdb1): previous I/O error to superblock detected [13674.040220] EXT4-fs (sdb1): previous I/O error to superblock detected [13674.040232] EXT4-fs error (device sdb1): ext4_journal_start_sb:260: Detected aborted journal [13674.040236] EXT4-fs (sdb1): Remounting filesystem read-only [13674.040238] EXT4-fs (sdb1): previous I/O error to superblock detected [13674.111334] EXT4-fs error (device sdb1): ext4_read_block_bitmap:350: comm faac: Cannot read block bitmap - block_group = 452, block_bitmap = 14680068 [13674.111340] EXT4-fs error (device sdb1): ext4_discard_preallocations:3886: comm faac: Error reading block bitmap for 452 [13674.396333] EXT4-fs error (device sdb1): ext4_read_block_bitmap:350: comm ogmrip: Cannot read block bitmap - block_group = 1, block_bitmap = 1026 [13674.396347] EXT4-fs error (device sdb1): ext4_discard_preallocations:3886: comm ogmrip: Error reading block bitmap for 1 [13674.482947] EXT4-fs (sdb1): previous I/O error to superblock detected [13674.482995] EXT4-fs error (device sdb1): ext4_put_super:737: Couldn't clean up the journal [13700.670561] usb 8-1: new SuperSpeed USB device using xhci_hcd and address 4 [13700.693053] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep [13700.694049] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep [13700.694932] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep [13700.695932] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep [13700.698109] scsi7 : usb-storage 8-1:1.0 [13701.691479] scsi 7:0:0:0: Direct-Access USB 3.0 MassStorage 0100 PQ: 0 ANSI: 4 [13701.693180] sd 7:0:0:0: Attached scsi generic sg2 type 0 [13701.695702] sd 7:0:0:0: [sdb] 3907029135 512-byte logical blocks: (2.00 TB/1.81 TiB) [13701.696222] xhci_hcd 0000:05:00.0: WARN: Stalled endpoint [13701.697016] sd 7:0:0:0: [sdb] Write Protect is off [13701.697026] sd 7:0:0:0: [sdb] Mode Sense: 03 00 00 00 [13701.700629] sd 7:0:0:0: [sdb] No Caching mode page present [13701.700640] sd 7:0:0:0: [sdb] Assuming drive cache: write through [13701.702845] xhci_hcd 0000:05:00.0: WARN: Stalled endpoint [13701.704839] sd 7:0:0:0: [sdb] No Caching mode page present [13701.704848] sd 7:0:0:0: [sdb] Assuming drive cache: write through [13701.727813] sdb: sdb1 [13701.729394] xhci_hcd 0000:05:00.0: WARN: Stalled endpoint [13701.731004] sd 7:0:0:0: [sdb] No Caching mode page present [13701.731008] sd 7:0:0:0: [sdb] Assuming drive cache: write through [13701.731011] sd 7:0:0:0: [sdb] Attached SCSI disk [13702.019835] EXT4-fs (sdb1): warning: maximal mount count reached, running e2fsck is recommended [13702.128134] EXT4-fs (sdb1): recovery complete [13702.128429] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/647973 Title: USB 3.0 on 10.10 x86_64 : xhci_hcd WARN: Stalled endpoint To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/647973/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
