[Bug 1371403] Re: [PATCH] Please disable USB autosuspend for Avocent SC Secure KVM

[Chris Halse Rogers]

Hello Bryce, or anyone else affected,

Accepted systemd into trusty-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/systemd/204-5ubuntu20.16 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: systemd (Ubuntu Trusty)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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https://bugs.launchpad.net/bugs/1371403

Title:
  [PATCH] Please disable USB autosuspend for Avocent SC Secure KVM

Status in systemd package in Ubuntu:
  Invalid
Status in systemd source package in Trusty:
  Fix Committed
Status in systemd source package in Utopic:
  Won't Fix

Bug description:
  My mouse becomes temporarily become unresponsive to drags and clicks,
  until I right-click or give keyboard input, when it's been idle for a
  few seconds.  The same thing affects the keyboard.  In some cases the
  mouse cursor jumps back to the center of the screen.

  The mouse and keyboard are connected to a number of different
  computers via an 8-port Avocent SC Secure KVM.  When the mouse and/or
  keyboard are directly attached to one of the PCs, there is no problem.
  I've tested with different keyboards and mice as well, and they're
  similarly messed up.

  Only the computers running Ubuntu 14.04 are affected.  Two of the computers are identical hardware, differing only in Ubuntu versions - the 14.04 one is affected but the one with 13.04 is not.  I also have a machine with 12.04 on it connected to the KVM which is fine.
  I first noticed the problem when I upgraded to 13.10.

  In powertop I notice that autosuspend is enabled for the Avocent.  If
  I switch that off, then the problem disappears completely.  I can also
  prevent it by issuing:

    echo 'on' > '/sys/bus/usb/devices/3-10/power/control';

  where 3-10 is the Avocent (the number is different on each of my
  systems).

  I notice in 42-usb-hid-pm.rules there is a rule for Avocent devices:

    # Catch-all for Avocent HID devices. Keyed off interface in order to only
    # trigger on HID class devices.
    ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="0624", ATTR{bInterfaceClass}=="03", TEST=="../power/control", ATTR{../power/control}="auto"

  However my KVM device doesn't appear to have a bInterfaceClass
  defined.

  In any case, the following udev rule corrects the problem for me:

  ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="0624",
  ATTR{idProduct}=="0013", ATTR{product}=="SC Secure KVM",
  TEST=="power/control", ATTR{power/control}:="on"

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