From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-fx0-f46.google.com ([209.85.161.46]:59928 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753748Ab0FMOVl (ORCPT ); Sun, 13 Jun 2010 10:21:41 -0400 Message-ID: <4C14E971.5020604@gmail.com> Date: Sun, 13 Jun 2010 16:21:37 +0200 From: thomas schorpp Reply-To: thomas.schorpp@gmail.com MIME-Version: 1.0 To: Alan Stern CC: "C. Hemsing" , linux-media@vger.kernel.org, linux-usb@vger.kernel.org Subject: Re: was: af9015, af9013 DVB-T problems. now: Intermittent USB disconnects with many (2.0) high speed devices References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: Am 13.06.2010 15:57, schrieb Alan Stern: > On Sun, 13 Jun 2010, thomas schorpp wrote: > >> ehci-hcd is broken and halts silently or disconnects after hours or a few days, with the wlan usb adapter > > How do you know the bug is in ehci-hcd and not in the hardware? All 3 usb devices and 2 different series VIA usb hosts and Hemsing's and many other broken i2c comms reporter's on linux-media are broken instead? Well, if we get that confirmed, I'll buy 2 of those with NEC chipset: http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=190318779935 > >> I was able to catch a dmesg err message like "ehci...force halt... handshake failed" once only. > > Can you please post the error message? Jun 3 08:38:29 tom3 kernel: [75071.004062] ehci_hcd 0000:00:0e.2: force halt; handhake cc9c0814 0000c000 00000000 -> -110 Jun 3 08:45:13 tom3 kernel: [75475.004061] ehci_hcd 0000:00:0e.2: force halt; handhake cc9c0814 0000c000 00000000 -> -110 Previous debian testing version of Linux tom3 2.6.32-5-686 #1 SMP Tue Jun 1 04:59:47 UTC 2010 i686 GNU/Linux, not yet reproduced with current version. > >> The disconnects with dvb-usb need reboot cause driver cannot be removed with modprobe. > > That sounds like it might be a bug in dvb-usb driver. It always should > be possible to remove the driver. Sure. > >> This long standing bug is really nasty and makes permanent high speed usb connections unusable on Linux, >> at least with this VIA hardware. >> >> No debug parms in modules, we need to ask linux-usb how to debug this. > > You can start by building a kernel with CONFIG_USB_DEBUG enabled. Yes, will do it, thx. > > Alan Stern > > y tom