From owner-freebsd-current@FreeBSD.ORG Tue Nov 1 17:09:15 2005 Return-Path: X-Original-To: FreeBSD-current@freebsd.org Delivered-To: FreeBSD-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 836E616A41F; Tue, 1 Nov 2005 17:09:15 +0000 (GMT) (envelope-from scottl@samsco.org) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.FreeBSD.org (Postfix) with ESMTP id E795243D49; Tue, 1 Nov 2005 17:09:10 +0000 (GMT) (envelope-from scottl@samsco.org) Received: from [192.168.254.201] ([192.168.254.201]) (authenticated bits=0) by pooker.samsco.org (8.13.4/8.13.4) with ESMTP id jA1H98as004082; Tue, 1 Nov 2005 10:09:08 -0700 (MST) (envelope-from scottl@samsco.org) Message-ID: <4367A137.6020005@samsco.org> Date: Tue, 01 Nov 2005 10:09:11 -0700 From: Scott Long User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.7.5) Gecko/20050321 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Antony Mawer References: <20051101070259.GC18710@wantadilla.lemis.com> <4367150C.4030508@mawer.org> In-Reply-To: <4367150C.4030508@mawer.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.4 required=3.8 tests=ALL_TRUSTED autolearn=failed version=3.1.0 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on pooker.samsco.org Cc: Greg 'groggy' Lehey , FreeBSD-current@freebsd.org Subject: Re: Really poor performance on /dev/ttyv* only X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Nov 2005 17:09:15 -0000 Antony Mawer wrote: > On 1/11/2005 6:02 PM, Greg 'groggy' Lehey wrote: > >> I've just installed -CURRENT on a Dell Inspiron 6000, and I discover >> that the keyboard response on virtual terminals (/dev/ttyv*) is very >> slow. If I keyboard repeat, the echo to the terminal is jerky, about >> 3 or 4 characters at a time with a marked delay in between. Under X >> or over the network there's no problem. Has anybody else seen this? >> The kernel isn't 100% GENERIC (I've disabled WITNESS and >> WITNESS_SKIPSPIN, for example), but I can't see anything that would >> explain this behaviour. > > > I've seen this on two FreeBSD 4.7 systems connected via a KVM (sharing > with two Windows 2003 servers)... typing at the console of them was > almost like typing via ssh on a satellite connection. Connecting via ssh > was fine, it was only locally that it was a problem. Resetting the > keyboard repeat rate on BSD had no discernible impact. > > I put it down to some sort of interaction between the KVM, the Windows > servers and FreeBSD and put up with it... > > Cheers > Antony > I have a USB KVM that violates the USB protocol and results in a storm on the USB controller once in a while. This can result in really sluggish console performance. I can imagine scenarios where PS/2 KVM could do similarily silly things with the same results. Scott