> How did you check the firmware build? The only information related to
firmware I was able to find where provided from solaar

solaar is a good way to get the device build number.

> Could you also provide the version ("iConfiguration" in "lsusb -v") of
your Unifying Receiver?

It seems my mouse is a slightly older version. You have build 62 for the
mouse and build 19 for the receiver. My mouse has build 60 for the mouse
and build 17 for the receiver.

Did you check if there is any interesting kernel messages
(/var/log/kern.log) when upower issues the "device changed" message
every 120 s? By any chance did you try it on another computer?

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https://bugs.launchpad.net/bugs/1704998

Title:
  Flashing LEDs (~2min interval) on Logitech Performance MX (USB
  Wireless) Mouse

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