From owner-freebsd-wireless@FreeBSD.ORG  Mon Jun  2 07:12:44 2014
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Date: Mon, 02 Jun 2014 09:13:22 +0200
From: Hans Petter Selasky <hps@selasky.org>
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To: Thomas Mueller <mueller6724@bellsouth.net>, freebsd-wireless@freebsd.org
Subject: Re: Change for the worse in rsu wireless driver
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On 06/02/14 07:30, Thomas Mueller wrote:
> I sent this message, without this top part, over an hour ago, and notice wlan0 is still up.  I intended but forgot to CC to freebsd-current.  But I am in newcons, having not started X so far this boot session.  Maybe something rotten with Xorg, or interaction between rsu and X, or rsu and Firefox.
>
> I am afraid to try again with X, don't want to mess the file system to the extent of losing data.
>
> WLAN device is Hiro H50191 USB wireless adapter, chipset RTL8191SU.
>
> I just updated FreeBSD-current, both amd64 and i386, now both rsu and Xorg are highly unstable, at least on amd64.
>
> FreeBSD amelia4 11.0-CURRENT FreeBSD 11.0-CURRENT #6 r266948: Sun Jun  1 19:12:44 UTC 2014     root@amelia4:/usr/obj/usr/src/sys/SANDY11NC  amd64
>
> root@amelia4:~ # ls -l /usr/src/sys/dev/usb/wlan
>
> total 1164
>
> -rw-r--r--  1 root  wheel   65759 Jun  1 16:23 if_rsu.c
>
> -rw-r--r--  1 root  wheel   19964 Jun  1 16:23 if_rsureg.h
>
> (snip)
>
> This is a change for the worse.  Now I can connect with Hiro H50191; bug in re Ethernet driver persists, so I can't connect that way.
>
> I also had several crashes in Xorg, so am typing this with vi in newcons.
>
> Tom

Hi,

Re-compile the rsu module with USB debugging enabled:

Add to: sys/modules/usb/rsu/Makefile

CFLAGS+= -DUSB_DEBUG

Rebuild and install.

After that lookup the debug knob using "sysctl hw.usb | grep rsu" and 
set it to 16. Then collect some debug messages in dmesg, when problems 
appear.

Thank you.

--HPS