I consider this SOLVED (gmail breaks threads sorry).
See syslog (some select lines) below - it looks like this USB adaptor
is not properly supported by the kernel.
Now I have the problem I had yesterday: without rebooting, I am now
stuck it seems:
$ sudo umount /n/
umount: /n: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
But simply disconnecting the device solved the hung terminals - they
are now back to normal.
Syslog:
Feb 27 10:55:31 x220a02 kernel: [ 589.109795] usb 4-1: reset
SuperSpeed USB device number 7 using xhci_hcd
Feb 27 10:55:31 x220a02 kernel: [ 589.129369] xhci_hcd 0000:0e:00.0:
xHCI xhci_drop_endpoint called with disabled ep ffff880212022f40
Feb 27 10:55:31 x220a02 kernel: [ 589.129372] xhci_hcd 0000:0e:00.0:
xHCI xhci_drop_endpoint called with disabled ep ffff880212022f80
Feb 27 10:55:31 x220a02 kernel: [ 589.261590] usb 4-1: reset
SuperSpeed USB device number 7 using xhci_hcd
Feb 27 10:55:31 x220a02 kernel: [ 589.281565] xhci_hcd 0000:0e:00.0:
xHCI xhci_drop_endpoint called with disabled ep ffff880212022f40
Feb 27 10:55:31 x220a02 kernel: [ 589.281568] xhci_hcd 0000:0e:00.0:
xHCI xhci_drop_endpoint called with disabled ep ffff880212022f80
Feb 27 10:55:31 x220a02 kernel: [ 589.417169] usb 4-1: reset
SuperSpeed USB device number 7 using xhci_hcd
Feb 27 10:55:31 x220a02 kernel: [ 589.435860] xhci_hcd 0000:0e:00.0:
xHCI xhci_drop_endpoint called with disabled ep ffff880212022f40
Feb 27 10:55:31 x220a02 kernel: [ 589.435862] xhci_hcd 0000:0e:00.0:
xHCI xhci_drop_endpoint called with disabled ep ffff880212022f80
Feb 27 10:55:31 x220a02 kernel: [ 589.561942] usb 4-1: reset
SuperSpeed USB device number 7 using xhci_hcd
Feb 27 10:55:31 x220a02 kernel: [ 589.580015] usb 4-1: device
descriptor read/all, error -71
Feb 27 10:55:32 x220a02 kernel: [ 589.953780] usb 4-1: reset
SuperSpeed USB device number 7 using xhci_hcd
Feb 27 10:55:32 x220a02 kernel: [ 589.969237] usb 4-1: got a wrong
device descriptor, warm reset device
Feb 27 10:55:33 x220a02 kernel: [ 591.584957] usb 4-1: device not
accepting address 7, error -22
Feb 27 10:55:34 x220a02 kernel: [ 592.365175] usb 4-1: device not
accepting address 7, error -22
Feb 27 10:55:34 x220a02 kernel: [ 592.365428] usb 4-1: USB
disconnect, device number 7
Feb 27 10:55:34 x220a02 kernel: [ 592.365857] sd 15:0:0:0: [sdd]
Synchronizing SCSI cache
Feb 27 10:55:34 x220a02 kernel: [ 592.368995] sd 15:0:0:0: [sdd]
Unhandled error code
Feb 27 10:55:34 x220a02 kernel: [ 592.368998] sd 15:0:0:0: [sdd]⋅⋅
Feb 27 10:55:34 x220a02 kernel: [ 592.369000] Result:
hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Feb 27 10:55:34 x220a02 kernel: [ 592.369001] sd 15:0:0:0: [sdd] CDB:⋅
Feb 27 10:55:34 x220a02 kernel: [ 592.369003] Read(10): 28 00 00 00
01 a0 00 00 08 00
Feb 27 10:55:34 x220a02 kernel: [ 592.369008] end_request: I/O error,
dev sdd, sector 416
Feb 27 10:55:34 x220a02 kernel: [ 592.369010] sd 15:0:0:0: [sdd]⋅⋅
Feb 27 10:55:34 x220a02 kernel: [ 592.369144] Buffer I/O error on
device sdd, logical block 512
Feb 27 10:55:35 x220a02 kernel: [ 592.753391] usb 4-1: new SuperSpeed
USB device number 8 using xhci_hcd
Feb 27 10:55:35 x220a02 kernel: [ 592.776382] usb 4-1: New USB device
found, idVendor=174c, idProduct=5136
Feb 27 10:55:35 x220a02 kernel: [ 592.776393] usb 4-1: New USB device
strings: Mfr=2, Product=3, SerialNumber=1
Feb 27 10:55:35 x220a02 kernel: [ 592.776398] usb 4-1: Product: AS2105
Feb 27 10:55:35 x220a02 kernel: [ 592.776402] usb 4-1: Manufacturer: ASMedia
Feb 27 10:55:35 x220a02 kernel: [ 592.776406] usb 4-1: SerialNumber:
00000000000000000000
Feb 27 10:55:35 x220a02 kernel: [ 592.778957] usb-storage 4-1:1.0:
USB Mass Storage device detected
Feb 27 10:55:35 x220a02 kernel: [ 592.779014] scsi16 : usb-storage 4-1:1.0
Feb 27 10:55:35 x220a02 mtp-probe: checking bus 4, device 8:
"/sys/devices/pci0000:00/0000:00:1c.6/0000:0e:00.0/usb4/4-1"
Feb 27 10:55:35 x220a02 mtp-probe: bus: 4, device: 8 was not an MTP device
Feb 27 10:56:12 x220a02 kernel: [ 630.185212] sd 18:0:0:0: [sdd]
Attached SCSI disk
Feb 27 10:56:26 x220a02 ntfs-3g[8401]: Version 2013.1.13AR.1 external FUSE 29
Feb 27 10:56:26 x220a02 ntfs-3g[8401]: Mounted /dev/sdd1 (Read-Write,
label "750A", NTFS 3.1)
Feb 27 10:56:26 x220a02 ntfs-3g[8401]: Cmdline options: rw
Feb 27 10:56:26 x220a02 ntfs-3g[8401]: Mount options:
rw,allow_other,nonempty,relatime,fsname=/dev/sdd1,blkdev,blksize=4096
Feb 27 10:56:26 x220a02 ntfs-3g[8401]: Ownership and permissions
disabled, configuration type 7
Feb 27 11:17:01 x220a02 /USR/SBIN/CRON[8536]: (root) CMD ( cd / &&
run-parts --report /etc/cron.hourly)
Feb 27 11:20:35 x220a02 kernel: [ 2093.161198] usb 4-1: reset
SuperSpeed USB device number 10 using xhci_hcd
Feb 27 11:20:35 x220a02 kernel: [ 2093.182178] xhci_hcd 0000:0e:00.0:
xHCI xhci_drop_endpoint called with disabled ep ffff880036797c40
Feb 27 11:20:35 x220a02 kernel: [ 2093.182181] xhci_hcd 0000:0e:00.0:
xHCI xhci_drop_endpoint called with disabled ep ffff880036797c80
Feb 27 11:23:43 x220a02 kernel: [ 2281.280560] INFO: task find:8558
blocked for more than 120 seconds.
Feb 27 11:23:43 x220a02 kernel: [ 2281.280572] Not tainted 3.12-1-amd64 #1
Feb 27 11:23:43 x220a02 kernel: [ 2281.280574] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Feb 27 11:23:43 x220a02 kernel: [ 2281.280577] find D
ffff880214fa5380 0 8558 7246 0x00000004
Feb 27 11:23:43 x220a02 kernel: [ 2281.280580] ffff880214fa5040
0000000000000086 00000000000142c0 ffff8800af85bfd8
Feb 27 11:23:43 x220a02 kernel: [ 2281.280582] 00000000000142c0
ffff8800af85bfd8 ffff8800adeae1e8 ffff880213c88000
Feb 27 11:23:43 x220a02 kernel: [ 2281.280583] ffff8800af85bb98
ffff8800adeae2c8 ffff8800b2212e20 ffff8800adeae1e8
Feb 27 11:23:43 x220a02 kernel: [ 2281.280585] Call Trace:
Feb 27 11:23:43 x220a02 kernel: [ 2281.280596] [<ffffffffa06fd535>] ?
__fuse_request_send+0xd5/0x2b0 [fuse]
Feb 27 11:23:43 x220a02 kernel: [ 2281.280599] [<ffffffff8107c3e0>] ?
wake_up_atomic_t+0x30/0x30
Feb 27 11:23:43 x220a02 kernel: [ 2281.280601] [<ffffffffa0702fd0>] ?
fuse_lookup_name+0x130/0x2c0 [fuse]
Feb 27 11:23:43 x220a02 kernel: [ 2281.280603] [<ffffffffa070318f>] ?
fuse_lookup+0x2f/0x100 [fuse]
Feb 27 11:23:43 x220a02 kernel: [ 2281.280607] [<ffffffff8117c6b4>] ?
lookup_real+0x14/0x50
Feb 27 11:23:43 x220a02 kernel: [ 2281.280608] [<ffffffff8117cf0a>] ?
__lookup_hash+0x2a/0x40
Feb 27 11:23:43 x220a02 kernel: [ 2281.280611] [<ffffffff8148aded>] ?
lookup_slow+0x39/0x9e
Feb 27 11:23:43 x220a02 kernel: [ 2281.280613] [<ffffffff8117f3e8>] ?
path_lookupat+0x718/0x7a0
Feb 27 11:23:43 x220a02 kernel: [ 2281.280616] [<ffffffff810115cd>] ?
__switch_to+0x16d/0x480
Feb 27 11:23:43 x220a02 kernel: [ 2281.280617] [<ffffffff8117f491>] ?
filename_lookup+0x21/0xc0
Feb 27 11:23:43 x220a02 kernel: [ 2281.280619] [<ffffffff8118313f>] ?
user_path_at_empty+0x4f/0x90
Feb 27 11:23:43 x220a02 kernel: [ 2281.280621] [<ffffffffa06fd63b>] ?
__fuse_request_send+0x1db/0x2b0 [fuse]
Feb 27 11:23:43 x220a02 kernel: [ 2281.280624] [<ffffffffa0703ed3>] ?
fuse_prepare_release+0x83/0xc0 [fuse]
Feb 27 11:23:43 x220a02 kernel: [ 2281.280626] [<ffffffff81177c61>] ?
vfs_fstatat+0x41/0x90
Feb 27 11:23:43 x220a02 kernel: [ 2281.280627] [<ffffffff81174bfd>] ?
__fput+0x14d/0x220
Feb 27 11:23:43 x220a02 kernel: [ 2281.280629] [<ffffffff81178160>] ?
SYSC_newfstatat+0x10/0x30
Feb 27 11:23:43 x220a02 kernel: [ 2281.280638] [<ffffffff8107890c>] ?
task_work_run+0x9c/0xd0
Feb 27 11:23:43 x220a02 kernel: [ 2281.280640] [<ffffffff81012929>] ?
do_notify_resume+0x59/0x90
Feb 27 11:23:43 x220a02 kernel: [ 2281.280642] [<ffffffff81499272>] ?
int_signal+0x12/0x17
Feb 27 11:23:43 x220a02 kernel: [ 2281.280643] [<ffffffff81498fb9>] ?
system_call_fastpath+0x16/0x1b
Feb 27 11:25:43 x220a02 kernel: [ 2401.299202] INFO: task find:8558
blocked for more than 120 seconds.
Feb 27 11:25:43 x220a02 kernel: [ 2401.299211] Not tainted 3.12-1-amd64 #1
Feb 27 11:25:43 x220a02 kernel: [ 2401.299213] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Feb 27 11:25:43 x220a02 kernel: [ 2401.299215] find D
ffff880214fa5380 0 8558 7246 0x00000004
Feb 27 11:25:43 x220a02 kernel: [ 2401.299219] ffff880214fa5040
0000000000000086 00000000000142c0 ffff8800af85bfd8
Feb 27 11:25:43 x220a02 kernel: [ 2401.299221] 00000000000142c0
ffff8800af85bfd8 ffff8800adeae1e8 ffff880213c88000
Feb 27 11:25:43 x220a02 kernel: [ 2401.299222] ffff8800af85bb98
ffff8800adeae2c8 ffff8800b2212e20 ffff8800adeae1e8
Feb 27 11:25:43 x220a02 kernel: [ 2401.299224] Call Trace:
Feb 27 11:25:43 x220a02 kernel: [ 2401.299235] [<ffffffffa06fd535>] ?
__fuse_request_send+0xd5/0x2b0 [fuse]
Feb 27 11:25:43 x220a02 kernel: [ 2401.299238] [<ffffffff8107c3e0>] ?
wake_up_atomic_t+0x30/0x30
...
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