From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from charlotte.tuxdriver.com ([70.61.120.58]:42753 "EHLO smtp.tuxdriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751187Ab0DMNPS (ORCPT ); Tue, 13 Apr 2010 09:15:18 -0400 Date: Tue, 13 Apr 2010 09:11:09 -0400 From: "John W. Linville" To: Ferdinand Rau Cc: linux-wireless@vger.kernel.org Subject: Re: Bug report: Controller RESET (DMA error) long after connecting Message-ID: <20100413131108.GB6331@tuxdriver.com> References: <4375153.331710.1271156960878.JavaMail.fmail@mwmweb085> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <4375153.331710.1271156960878.JavaMail.fmail@mwmweb085> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue, Apr 13, 2010 at 01:09:20PM +0200, Ferdinand Rau wrote: > Hi, > > I'm on a Dell Vostro 1310 (running Debian testing) using a BCM4312 wireless chip and the firmware retrieved by the b43-fwcutter from git (the debian version didn't work with my card - the upgrade to kernel 2.6.31 only happend recently). > I basically followed the instructions on this site: > http://www.linuxwireless.org/en/users/Drivers/b43#fw-b43-lp > > The wireless connection works in principle (can connect to different networks, can ping, can browse), but at some point the following error happens and the connection is reset every few seconds afterwards rendering it unusable: > > ERROR: Fatal DMA error: 0x00000400, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 > > Controller RESET (DMA error) ... > > Similar to this thread (?): https://lists.berlios.de/pipermail/bcm43xx-dev/2009-November/006273.html Chances are that your device will work in PIO mode -- you can try building a kernel w/ CONFIG_B43_FORCE_PIO. In 2.6.34, there is code to switch automatically to PIO mode when such errors are observed. Hth! John -- John W. Linville Someday the world will need a hero, and you linville@tuxdriver.com might be all we have. Be ready.