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Bug#787889: general: USB keyboard stops working after a few seconds due to USB suspend

Package: general
Severity: important

Dear Maintainer,

* What led up to the situation?

Upgraded packages on 2015-05-04. Upgrades included kernel update from 3.16.0-4-amd64 to 4.0.0-1-amd64.

* What exactly did you do (or not do) that was effective (or

Attempted to use USB keyboard in, in Xorg and in virtual TTY.

* What was the outcome of this action?

There appeared to be no input from the keyboard. After disconnecting and reconnecting the keyboard it functioned; but after a period of seconds it consistently stopped working until it was disconnected and reconnected again.

* What outcome did you expect instead?

I expected keyboard input to work consistently.

* Is there a workaround?

I am able to work around the issue by overriding USB power management for the keyboard device:

    cat on | sudo tee /sys/bus/usb/devices/3-1.2.2/power/level

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (600, 'unstable'), (500, 'stable-updates'), (500, 'stable'), (400, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.0.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

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