From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754776AbYHYQZd (ORCPT ); Mon, 25 Aug 2008 12:25:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753816AbYHYQZ0 (ORCPT ); Mon, 25 Aug 2008 12:25:26 -0400 Received: from fg-out-1718.google.com ([72.14.220.156]:20699 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753506AbYHYQZZ (ORCPT ); Mon, 25 Aug 2008 12:25:25 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=c5SaCEtvhJqbwvxI+c0bIo405uUhVZenTG2IcNIITNCDNPuKJRJBtlhLGilGfr7ZZp vDnjhLA/RcTr9exHseQfmJsDGAFksissksZ2PbNvhcqLo0rDAHxFCCaosV1bvxsuBZgb BOm4idn/CO7+KnBIbYWJ9EEM+Ag1TIG+HuUZQ= Message-ID: <5e50e1d60808250925i5fcfc5d2idbe694e9da1057a7@mail.gmail.com> Date: Mon, 25 Aug 2008 21:55:22 +0530 From: "umesh kernel" To: ctuxer Subject: Re: better support for EV-DO AC8700 800 M usbserial modem ?? Cc: linux-kernel@vger.kernel.org, eerpini@gmail.com, "Greg KH" In-Reply-To: <20080825154946.GA8628@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080825154946.GA8628@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 25, 2008 at 9:19 PM, Greg KH wrote: > On Sun, Aug 24, 2008 at 09:41:33AM +0530, ctuxer wrote: >> hi everyone , >> >> i have been using the EVDO AC8700 modem (usbserial) with kernel 2.6.26.2 , >> it uses the 'option' module along with the generic usbserial module . Well >> i am happy for the improved support for the modem handling in the new >> kernels( like now i don have to modprobe with the vendor and product IDs ) >> , there is one point specific to this modem which is still not handled , >> ..... the modem switches between EVDO and CDMA mode when the signal >> strength is low or when there is a bandwidth overload at the vendor's( the >> service provider , bsnl in my case ) tower . This switch in the mode is >> not recognised by the driver and the connection is lost once this switching >> occurs . I have to restart the wvdial program to reconnect . >> >> But if the modem were in CDMA mode when i connect , then the connection is >> not lost when the modem switches back from CDMA to EVDO . I really don know >> enough to understand what is the difference between the two cases or what >> can be done to improve the support for this usbserial modem , ... can >> anyone help ? > > This looks like something the userspace side has to handle, the option > driver is just a dumb "pass-through" type driver, it doesn't really > control the modem at all. The "control" channel on the modem allows > this to happen, a userspace program drives this. > > good luck, > I am using the same EVDO modem, but using KPPP as dialer and using option module(also tried airprime module after adding the vendor and product ids ). I am not facing this. issue. Connection is fine when switching occurs. I can see that whenever modem light turns from GREEN(EVDO) to Orange(CDMA 1x RTT) or back , only the data rate is changing but the conenction is fine. Please check with KPPP dialer and enable the option "Auto reconnect". Regards, Umesh