The following reply was made to PR usb/188829; it has been noted by GNATS.

From: Hans Petter Selasky <h...@selasky.org>
To: Roberto de Iriarte <rdeir...@spock.cl>, 
 freebsd-gnats-sub...@freebsd.org
Cc:  
Subject: Re: usb/188829: atp fails on Macbook Pro 4.1
Date: Sun, 20 Apr 2014 18:35:27 +0200

 On 04/20/14 18:01, Roberto de Iriarte wrote:
 >
 >> Number:         188829
 >> Category:       usb
 >> Synopsis:       atp fails on Macbook Pro 4.1
 >> Confidential:   no
 >> Severity:       non-critical
 >> Priority:       low
 >> Responsible:    freebsd-usb
 >> State:          open
 >> Quarter:
 >> Keywords:
 >> Date-Required:
 >> Class:          sw-bug
 >> Submitter-Id:   current-users
 >> Arrival-Date:   Sun Apr 20 16:10:00 UTC 2014
 >> Closed-Date:
 >> Last-Modified:
 >> Originator:     Roberto de Iriarte
 >> Release:        10.0-STABLE
 >> Organization:
 > De Iriarte
 >> Environment:
 > FreeBSD mbp 10.0-STABLE FreeBSD 10.0-STABLE #13 r264692M: Sun Apr 20 
 > 12:14:28 CLST 2014     root@mbp:/usr/obj/usr/src/sys/GENERIC  amd64
 >> Description:
 > On my Macbook Pro 4.1, after upgrading from 10.0-RELEASE to 10.0-STABLE, the 
 > atp touchpad driver becomes unresponsive after a few minutes under high I/O 
 > load, until it stalls completely. The device never unstalls, regardless of 
 > system load.
 >
 > Closing and opening /dev/atp0 (i.e. restarting moused) restores 
 > responsiveness for a couple of minutes, then it fails in the same manner.
 >
 > Reverting back /usr/src/sys/dev/usb/input/atp.c from rev. 263063 to rev. 
 > 233774 (as shipped with FreeBSD 10.0-RELEASE) solves the problem completely 
 > on my machine.
 >
 > Unfortunately, i am not versed in the workings of the atp driver in order to 
 > debug the new driver any further.
 >> How-To-Repeat:
 > Use the trackpad under high I/O load
 >> Fix:
 > Hack: Revert back to /usr/src/sys/dev/usb/input/atp.c as shipped with 
 > 10.0-RELEASE (r. 233774)
 >
 >> Release-Note:
 >> Audit-Trail:
 >> Unformatted:
 > _______________________________________________
 
 Hi,
 
 Can you send output from:
 
 usbconfig dump_device_desc
 
 which is relevant for your device.
 
 What happens if you add to /boot/loader.conf
 
 wsp_load=YES
 
 And re-boot?
 
 --HPS
 
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