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[Bug 1690362] Re: Exar usb-serial doesn't restore baud rate after resume from S3/S4

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Timo Aaltonen <tjaalton@xxxxxxxxxx>
Date: Mon, 09 Apr 2018 08:23:28 -0000
Reply-to: Bug 1690362 <1690362@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

still need to send this for bionic kernel


** Also affects: linux (Ubuntu Bionic)
   Importance: Critical
       Status: Fix Released

** Also affects: linux-oem (Ubuntu Bionic)
   Importance: Undecided
     Assignee: Shrirang Bagul (shrirang-bagul)
       Status: Confirmed

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

** Changed in: linux-oem (Ubuntu Bionic)
       Status: Confirmed => Fix Committed

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https://bugs.launchpad.net/bugs/1690362

Title:
  Exar usb-serial doesn't restore baud rate 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:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released
Status in linux-oem source package in Xenial:
  Invalid
Status in linux source package in Bionic:
  Fix Released
Status in linux-oem source package in Bionic:
  Fix Committed

Bug description:
  Resume from suspend-to-ram and suspend-to-disk should restore data send/receive over Exar usb-serial ports. The XR21V1412 ports were using the hardware power-on default of 9600bps
  after resume from S3/S4. This patch re-initializes the baud rate and fixes the re-connection issues after resume from S3/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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