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Re: kern/48441: ums(4) flapping with recent logitech mice

The following reply was made to PR kern/48441; it has been noted by GNATS.

From: Ryo ONODERA <>
Subject: Re: kern/48441: ums(4) flapping with recent logitech mice
Date: Sun, 05 Jan 2014 17:02:56 +0900 (JST)

 From:, Date: Wed, 11 Dec 2013 06:30:00 
+0000 (UTC)
 > This is presumably a bug workaround for Windows; I guess if you don't
 > talk to the mouse for 60 seconds it assumes the OS's driver has wedged
 > and reconnects itself.
 > Probably we ought to try to figure out either how to disable this
 > behavior, or how to detect it and add something to ums to pat the
 > mouse regularly so it doesn't do this.
 > If anyone knows of a useful channel, it might also help in the long
 > run to send Logitech a cluebat labelled "exponential backoff".
 I have 3 mice that has same behavior.
 Is this related to USB autosuspend described in ?
 PGP fingerprint = 82A2 DC91 76E0 A10A 8ABB  FD1B F404 27FA C7D1 15F3

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