The following CLs have been committed (noted  issue 653979 #c26 and 653979#c27):

  The following revision refers to this bug:
    https://chromium.googlesource.com/chromiumos/overlays/board-overlays/+/627944047dd910c016ccf1af5b543eac39cc4727

  commit 627944047dd910c016ccf1af5b543eac39cc4727
  Author: Ben Chan <benchan@chromium.org>
  Date: Fri Jan 20 22:26:05 2017

  chromeos-base/modem-watchdog: add package

  This CL adds a chromeos-base/modem-watchdog package, which implements a
  watchdog to monitor if the built-in modem (Huawei ME936) on Kip is
  successfully picked up ModemManager within a specified amount of time
  after the modem appears on USB under USB configuration 3 (i.e. MBIM
  mode). The watchdog will power cycle the modem upon timeout. This is a
  temporary workaround of an out-of-sync issue between the modem and the
  host (chromium:653979).

  BUG= chromium:653979 
  TEST=Tested the following on a Kip with a built-in Huawei ME936 modem:
  - Verified that the watchdog performs nothing and exits gracefully
    when the modem is picked up by ModemManger within the specified
    timeout.
  - After reproducing the issue described in chromium:653979. verified
    that the modem is power-cycled by the watchdog and then picked up
    by ModemManger afterwards.

  Change-Id: Ie5efebcc04b8aa92f8c294efc4707f3131f4e4a0
  Reviewed-on: https://chromium-review.googlesource.com/431200
  Commit-Ready: Ben Chan <benchan@chromium.org>
  Tested-by: Ben Chan <benchan@chromium.org>
  Reviewed-by: Mike Frysinger <vapier@chromium.org>

  [add] https://crrev.com/627944047dd910c016ccf1af5b543eac39cc4727/overlay-kip/chromeos-base/modem-watchdog/modem-watchdog-0.0.1-r1.ebuild
  [add] https://crrev.com/627944047dd910c016ccf1af5b543eac39cc4727/overlay-kip/chromeos-base/modem-watchdog/modem-watchdog-0.0.1.ebuild
  [add] https://crrev.com/627944047dd910c016ccf1af5b543eac39cc4727/overlay-kip/chromeos-base/modem-watchdog/files/chromeos-kip-modem-watchdog.sh
  [add] https://crrev.com/627944047dd910c016ccf1af5b543eac39cc4727/overlay-kip/chromeos-base/modem-watchdog/files/99-chromeos-kip-modem-watchdog.rules


  The following revision refers to this bug:
    https://chromium.googlesource.com/chromiumos/overlays/board-overlays/+/c006c96c7f605dec93740cf30d325b843c7592dc

  commit c006c96c7f605dec93740cf30d325b843c7592dc
  Author: Ben Chan <benchan@chromium.org>
  Date: Fri Jan 20 22:32:44 2017

  chromeos-bsp-kip: include chromeos-base/modem-watchdog package

  This CL modifies the Kip BSP to include the chromeos-base/modem-watchdog
  package, which implements a workaround for the out-of-sync issue
  (chromium:653979) between the host and the built-in modem on Kip.

  BUG= chromium:653979 
  TEST=Verified that the watchdog files are installed on kip.

  Change-Id: I9f6a98c8520965b868ef15e3080726e7f0057027
  Reviewed-on: https://chromium-review.googlesource.com/431201
  Commit-Ready: Ben Chan <benchan@chromium.org>
  Tested-by: Ben Chan <benchan@chromium.org>
  Reviewed-by: Mike Frysinger <vapier@chromium.org>

  [rename] https://crrev.com/c006c96c7f605dec93740cf30d325b843c7592dc/overlay-kip/chromeos-base/chromeos-bsp-kip/chromeos-bsp-kip-0.0.1-r15.ebuild
  [modify] https://crrev.com/c006c96c7f605dec93740cf30d325b843c7592dc/overlay-kip/chromeos-base/chromeos-bsp-kip/chromeos-bsp-kip-0.0.1.ebuild

Your change meets the bar and is auto-approved for M57. Please go ahead and merge the CL to branch 2987 manually. Please contact milestone owner if you have questions.
Owners: amineer@(clank), cmasso@(bling), ketakid@(cros), govind@(desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

+ketakid to confirm comment 5

govind@ do you have any concerns with this? Looks like a Chrome CL.

It's a Chrome OS CL, which only affects the Kip device with a built-in modem

benchan@ please go ahead and land on M57.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/overlays/board-overlays/+/b8ac0838851ea69924c04698cfc162e7fe5a61b2

commit b8ac0838851ea69924c04698cfc162e7fe5a61b2
Author: Ben Chan <benchan@chromium.org>
Date: Tue Jan 24 18:49:57 2017

chromeos-base/modem-watchdog: log watchdog PID instead of logger PID

This CL fixes the log functions in chromeos-kip-modem-watchdog.sh to use
the watchdog PID instead of the logger PID when outputting messages to
the system log. This helps correlate messages produced by the same
watchdog process.

BUG= chromium:653979 
BUG= chromium:684620 
TEST=Tested the following on a Kip with a built-in Huawei ME936 modem:
- Observed /var/log/messages for modem-watchdog messages. The messages
  produced by the same watchdog process have the same process ID.
- Manually power cycle the modem and observd a new watchdog process is
  triggered. The messages produced by the new watchdog process have a
  different process ID.

Change-Id: Ia741d273db08afcd26808622ac661be522f3c649
Reviewed-on: https://chromium-review.googlesource.com/431837
Commit-Ready: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
(cherry picked from commit b2418aacf04534edd91b529d27658dc3188e9a06)
Reviewed-on: https://chromium-review.googlesource.com/433382
Commit-Queue: Ben Chan <benchan@chromium.org>

[modify] https://crrev.com/b8ac0838851ea69924c04698cfc162e7fe5a61b2/overlay-kip/chromeos-base/modem-watchdog/files/chromeos-kip-modem-watchdog.sh
[rename] https://crrev.com/b8ac0838851ea69924c04698cfc162e7fe5a61b2/overlay-kip/chromeos-base/modem-watchdog/modem-watchdog-0.0.1-r2.ebuild

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

Thanks for your time! To disable nags, add the Disable-Nags label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot