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Re: PR/47286

The following reply was made to PR kern/47286; it has been noted by GNATS.

From: Iain Hibbert <>
Subject: Re: PR/47286
Date: Wed, 26 Dec 2012 18:13:47 +0000 (GMT)

 Apologies for delay, but analysis of the PR is as follows
 After some discussion with Martin which does not appear here, it appears
 that the mouse was failing to authenticate with to the host. I suggested
 disabling that (providing "-m none" to btdevctl), which revealed a problem
 with the bthidev.c code, which did not handle the "none" linkmode
 properly. This was fixed and the mouse does connect and the basic mouse
 functions do work now
 I was concerned that there could be different problem because
 authentication failed, but it appears that Microsoft believe[1] that this
 is not required, and the Bluetooth HID specification[2] does not mandate
 that mice support it. Our btdevctl(8) program sets a linkmode of "auth"
 for HID devices by default, and I added a comment to the manpage pointing
 out that this may need to be modified manually. (will add something to the
 Guide also)
 I also increased the diagnostics in the bthidev(4) driver to print the
 errno for failed connections, which would hopefully make it easier to
 diagnose why a device was not connecting.
 (will request this is pulled up to -6 and -5 branches)

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