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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1886366

and then change the status of the bug to 'Confirmed'.

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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1886366

Title:
  USB External Drive Stalls and Timeouts

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Not sure of the package naming for the Linux Kernel. However since version 
4.15.0.28 I've been getting timeouts like this in dmesg:
  [63075.835488] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables 
this message.
  [63075.835491] scsi_eh_7       D    0   273      2 0x80004000
  [63075.835494] Call Trace:
  [63075.835504]  __schedule+0x2b9/0x6c0
  [63075.835507]  schedule+0x42/0xb0
  [63075.835510]  schedule_preempt_disabled+0xe/0x10
  [63075.835513]  __mutex_lock.isra.0+0x182/0x4f0
  [63075.835515]  ? __switch_to_asm+0x40/0x70
  [63075.835517]  ? __switch_to_asm+0x34/0x70
  [63075.835519]  ? __switch_to_asm+0x34/0x70
  [63075.835520]  ? __switch_to_asm+0x40/0x70
  [63075.835523]  __mutex_lock_slowpath+0x13/0x20
  [63075.835526]  mutex_lock+0x2e/0x40
  [63075.835531]  device_reset+0x22/0x50 [usb_storage]
  [63075.835535]  scsi_eh_ready_devs+0x56c/0xa30
  [63075.835540]  ? __pm_runtime_resume+0x60/0x80
  [63075.835543]  scsi_error_handler+0x432/0x500
  [63075.835548]  kthread+0x104/0x140
  [63075.835550]  ? scsi_eh_get_sense+0x210/0x210
  [63075.835553]  ? kthread_park+0x80/0x80
  [63075.835555]  ret_from_fork+0x35/0x40

  The drive works fine on kernels 4.15.0.28 and older.

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