The following revision refers to this bug:
  https://chromium.googlesource.com/external/github.com/luci/luci-py.git/+/7aac07eca658e59b40512f7c70d4f5aa9aa3514a

commit 7aac07eca658e59b40512f7c70d4f5aa9aa3514a
Author: bpastene <bpastene@chromium.org>
Date: Tue Aug 30 19:49:39 2016

swarming: Roll py-adb to 775c24...

Includes disabling USB reset on USB error.

BUG= 642440 

Review-Url: https://codereview.chromium.org/2289293003

[modify] https://crrev.com/7aac07eca658e59b40512f7c70d4f5aa9aa3514a/appengine/third_party/python-adb/README.swarming
[modify] https://crrev.com/7aac07eca658e59b40512f7c70d4f5aa9aa3514a/appengine/third_party/python-adb/adb/contrib/adb_commands_safe.py

Going to need to re-enable usb resets now. I'll look into decreasing the amount of resets we send, but something's got to give. It's looking like skia folks are running into this as well.

The following revision refers to this bug:
  https://chromium.googlesource.com/external/github.com/luci/luci-py.git/+/8c84f5406cf6ff9587e17e1b3b44456dcb533707

commit 8c84f5406cf6ff9587e17e1b3b44456dcb533707
Author: bpastene <bpastene@chromium.org>
Date: Fri Oct 14 19:37:38 2016

swarming: Enable USB resets in python-adb on the staging instance.

BUG= 642440 

Review-Url: https://codereview.chromium.org/2405613002

[modify] https://crrev.com/8c84f5406cf6ff9587e17e1b3b44456dcb533707/appengine/swarming/swarming_bot/api/platforms/android.py
[modify] https://crrev.com/8c84f5406cf6ff9587e17e1b3b44456dcb533707/appengine/third_party/python-adb/adb/contrib/adb_commands_safe.py
[modify] https://crrev.com/8c84f5406cf6ff9587e17e1b3b44456dcb533707/appengine/third_party/python-adb/adb/contrib/high.py

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/infra/infra_internal.git/+/51f758378df9d458135ca268e5e77544c9d87078

commit 51f758378df9d458135ca268e5e77544c9d87078
Author: bpastene <bpastene@google.com>
Date: Fri Oct 14 20:42:52 2016

Reenabled usb resets on dev. If nothing's changed, we should see https://chromium-swarm.appspot.com/bot?id=build20-b4 drop offline in the near future. From Peter, our plan of attack when it does is:

"""
If pre-xenial R210: update kernel to xenial
If Xenial-based R210:  disable ipmi management software as it controls vusb
connections.
If xenial-based R210: swap out with R230 and connect up the usb 3.0 hub to the
3.0 port.
"""

I'll keep an eye on it.

Wrong link to bot. Correct one: https://chromium-swarm-dev.appspot.com/bot?id=build20-b4

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/infra/infra_internal.git/+/8b769eafcb7bfe15f082fd64bdc1991112fcf9aa

commit 8b769eafcb7bfe15f082fd64bdc1991112fcf9aa
Author: Benjamin Pastene <bpastene@google.com>
Date: Fri Nov 18 22:31:45 2016

I think things are more stable now. It's still triggering usb resets, but at a reduced rate.