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Date: Tue, 17 Sep 2013 15:58:39 -0700
From: John-Mark Gurney <jmg@funkthat.com>
To: Lev Serebryakov <lev@freebsd.org>
Subject: Re: umcs (4-Port-USB-serial) triggering way too much ehci IRQs
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Lev Serebryakov wrote this message on Tue, Sep 17, 2013 at 23:08 +0400:
> Hello, Harald.
> You wrote 17 ???????????????? 2013 ??., 21:43:17:
> 
> HS> Is that worth a try?
> HS> http://www.asix.com.tw/FrootAttach/driver/MCS7840_7820_FreeBSD_driver_v1.1.zip
>   Nope. I've started from this driver, and it even doesn't support BREAK
>  signal (it is was first reason why I start to write new one -- I needed
>  BREAK to enter kernel debugger).

You do know of:
# Solaris implements a new BREAK which is initiated by a character
# sequence CR ~ ^b which is similar to a familiar pattern used on
# Sun servers by the Remote Console.  There are FreeBSD extensions:
# CR ~ ^p requests force panic and CR ~ ^r requests a clean reboot.
options         ALT_BREAK_TO_DEBUGGER

to add to your kernel file right?

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."