Re: kern/51248: The HP 2170p umts umodem0 yoyoes

[David Holland <dholland-bugs%netbsd.org@localhost>]

The following reply was made to PR kern/51248; it has been noted by GNATS.

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/51248: The HP 2170p umts umodem0 yoyoes
Date: Sun, 26 Jun 2016 04:26:28 +0000

 not sent to gnats (use gnats-bugs@)
 
 The ums(4) PR is 48441, but I doubt it's directly related.
 
    ------
 
 From: Paul Goyette <paul%whooppee.com@localhost>
 To: gnats%netbsd.org@localhost
 Subject: Re: pending/51248
 Date: Thu, 16 Jun 2016 09:57:13 +0800 (PHT)
 
 This same (or very similar) behavior is seen on my amd64 system, but for a usb
 mouse rather than a modem.  (Also, Christos - I think it was him - had opened
 a PR for the mouse behavior before, but I cannot find it.)
 
 For the mouse situation, the following messages cycle:
 
 	<60-seconds>
 	wsmouse0: detached
 	ums0: detached
 	uhidev0: detached
 	uhidev0: at uhub0 port 3 (addr 1) disconnected
 	<2-3 seconds>
 	uhidev0 at uhub0 port 3 configuration 1 interface 0
 	uhidev0: PixArt USB Optical Mouse, rev 2.00/1.00, addr 31, iclass 3/1
 	ums0 at uhidev0: 3 buttons and Z dir
 	wsmouse0 at ums0 mux 0
 	<60-seconds>
 	wsmouse0: detached
 	ums0: detached
 	uhidev0: detached
 	uhidev0: at uhub0 port 3 (addr 31) disconnected
 	...
 
 However, if I have X running, _and_ I have my wsdisplay on the X display
 (display #4), the messages stop;  they only occur when I am "watching" a non-X
 wsdisplay window, regardless of whether X is running.
 
 It seems as though X is "tickling" the mouse in some manner which results in a
 "keep-alive" behavior.  Without this, something(tm) happens and the mouse
 driver times out and then reconnects.
 
 
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