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[Shrirang Bagul <shrirang.bagul@xxxxxxxxxxxxx>]

** Also affects: linux-oem (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux-oem (Ubuntu)
       Status: New => Confirmed

** Changed in: linux-oem (Ubuntu)
     Assignee: (unassigned) => Shrirang Bagul (shrirang-bagul)

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https://bugs.launchpad.net/bugs/1685133

Title:
  Fix RX fail issue on Exar USB serial driver after resume from S3/S4

Status in HWE Next:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux-oem package in Ubuntu:
  Confirmed
Status in linux source package in Xenial:
  Fix Released
Status in linux-oem source package in Xenial:
  New

Bug description:
  Resolution of LP: #1645591 added support for Exar USB UART devices in
  Ubuntu Xenial kernel. However, the devices fail to RX data after
  system resumes from suspend-to-ram(S3) and suspend-to-disk(S4). This
  bug is to track the integration of the driver released by the vendor
  to fix this issue.

  Changelog:
      
  Version 1B, 11/6/2015
  Fixed Bug: The conditional logic to support kernel 3.9 was incorrect(line 396 in xr_usb_serial_common.c).
      
  Version 1A, 1/9/2015
  This driver will work with any USB UART function in these Exar devices:
          XR21V1410/1412/1414
          XR21B1411
          XR21B1420/1422/1424
          XR22801/802/804

  Exar serial devices are typically enuremated as /dev/ttyXRUSB[0-3]

  This bug is used for tracking purposes, please do not triage.

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