bin/77786: moused dies when unplugging mouse

Gleb Smirnoff glebius at
Mon Feb 21 10:30:20 GMT 2005

The following reply was made to PR bin/77786; it has been noted by GNATS.

From: Gleb Smirnoff <glebius at>
To: Robert Millan <rmh at>
Cc: FreeBSD-gnats-submit at
Subject: Re: bin/77786: moused dies when unplugging mouse
Date: Mon, 21 Feb 2005 13:29:20 +0300

 On Sun, Feb 20, 2005 at 05:08:19PM +0100, Robert Millan wrote:
 R> >Description:
 R> 	When moused is being used to process input from an USB mouse, and the
 R> 	mouse is dettached, causing the /dev/ums0 to disappear, moused will
 R> 	die (complains about open() failing).  So after reattaching the mouse
 R> 	you'll have to restart the daemon manualy.
 R> 	With this patch, moused's behaviour is closer to what you'd expect from
 R> 	a daemon and instead of diing it polls de device untill it can be
 R> 	open again.
 This is correct behavior. First, mouse may never return to USB port. What for
 do we need moused daemon running? Second, another mouse can be inserted, with
 another protocol.
 The correct fix for your problem is correct /etc/devd.conf, containing this
 attach rule:
 attach 100 {
         device-name "ums[0-9]+";
         action "/etc/rc.d/moused start $device-name";
 If you don't mind, I close the PR.
 Totus tuus, Glebius.

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