From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 10 May 2001 09:02:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 10 May 2001 08:59:41 -0400 Received: from zeus.kernel.org ([209.10.41.242]:47751 "EHLO zeus.kernel.org") by vger.kernel.org with ESMTP id ; Thu, 10 May 2001 08:59:24 -0400 Date: Wed, 9 May 2001 22:38:13 -0700 From: Greg KH To: clameter@lameter.com Cc: linux-kernel@vger.kernel.org Subject: Re: USB broken in 2.4.4? Serial Ricochet works, USB performance sucks. Message-ID: <20010509223813.B4980@kroah.com> In-Reply-To: <20010509222456.A4960@kroah.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from clameter@lameter.com on Wed, May 09, 2001 at 11:25:26PM -0700 X-Operating-System: Linux 2.2.19 (i586) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 09, 2001 at 11:25:26PM -0700, clameter@lameter.com wrote: > > The Richochet USB stuff uses generic serial I/O. No special driver. And it > works fine under Win/ME. Have you run a regular PPP connection over the > ACM driver with an MTU of 1500? The Linux USB ACM driver is the same "generic serial I/O" driver that you speak of Win/ME having. What is the MTU setting under Win/ME for the device? And no, I haven't run a PPP connection over a ACM device, as I do not have an ACM device (otherwise I would have fixed the speed issues by now :) But again, there are no packet size limitations in the driver, except as such is specified by the specific device (endpoint size is determined by the device, not the driver.) So that would point to either a PPP problem (maybe), or a device problem (probably, would have to have a large buffer to handle a MTU of that size, and silicon isn't cheap for tiny devices like modems.) Hope this helps, greg k-h