Public bug reported:

[SRU Justification]

[Impact]
This update adds the latest vendor release version on the Exar USB serial 
device.

[Fixes]
New features include:
1. Fix for RX fail after wake-up from sleep (S3/S4)
2. Removes unnecessary debug messages

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 enumerated as /dev/ttyXRUSB[0-3].

[Regression Potential]
Low. This driver binds to Exar USB Serial devices on the Dell Edge 300x GW.
These updates are being carried in the linux-oem (4.15.y) kernel for more than 
2 years without any regressions.

This bug is for tracking purposes only, please don't triage.

** Affects: linux (Ubuntu)
     Importance: High
         Status: Confirmed

** Affects: linux (Ubuntu Bionic)
     Importance: High
         Status: Confirmed

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

** Description changed:

  [SRU Justification]
  
  [Impact]
  This update adds the latest vendor release version on the Exar USB serial 
device.
  
  [Fixes]
  New features include:
  1. Fix for RX fail after wake-up from sleep (S3/S4)
  2. Removes unnecessary debug messages
  
  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 enumerated as /dev/ttyXRUSB[0-3].
  
  [Regression Potential]
- Low. This driver binds to Exar USB Serial devices on the Dell Edge 300x GW. 
+ Low. This driver binds to Exar USB Serial devices on the Dell Edge 300x GW.
  These updates are being carried in the linux-oem (4.15.y) kernel for more 
than 2 years without any regressions.
+ 
+ This bug is for tracking purposes only, please don't triage.

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

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

** Changed in: linux (Ubuntu Bionic)
   Importance: Undecided => High

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1863834

Title:
  [bionic] updates to Exar USB serial driver

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Bionic:
  Confirmed

Bug description:
  [SRU Justification]

  [Impact]
  This update adds the latest vendor release version on the Exar USB serial 
device.

  [Fixes]
  New features include:
  1. Fix for RX fail after wake-up from sleep (S3/S4)
  2. Removes unnecessary debug messages

  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 enumerated as /dev/ttyXRUSB[0-3].

  [Regression Potential]
  Low. This driver binds to Exar USB Serial devices on the Dell Edge 300x GW.
  These updates are being carried in the linux-oem (4.15.y) kernel for more 
than 2 years without any regressions.

  This bug is for tracking purposes only, please don't triage.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863834/+subscriptions

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