Return-path: Received: from netrider.rowland.org ([192.131.102.5]:44153 "HELO netrider.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1755828Ab1CSBiP (ORCPT ); Fri, 18 Mar 2011 21:38:15 -0400 Date: Fri, 18 Mar 2011 21:38:13 -0400 (EDT) From: Alan Stern To: Mihai =?utf-8?q?Don=C8=9Bu?= cc: =?utf-8?q?Rafa=C5=82_Mi=C5=82ecki?= , , , Subject: Re: [b43] usb device disconnects automatically after 1s In-Reply-To: <201103190048.27759.mihai.dontu@gmail.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Sat, 19 Mar 2011, Mihai Donțu wrote: > > Another thing you can try is to get usbmon traces under both 2.6.37 and > > 2.6.38. Instructions are in the kernel source file > > Documentation/usb/usbmon.txt. > > I'm unable to get a usbmon dump on 2.6.37. Strangely, the only USB device > making noise (on 0u) is my mouse's wireless receiver. I had no such problem on > 2.6.38 though. I noticed your config has CONFIG_USB_EHCI_TT_NEWSCHED disabled. You really should enable it (although I doubt that it is responsible for this problem, since 2.6.37 works without it). The 2.6.38 usbmon trace shows pretty much what you might expect: The device connects and is initialized and enumerated normally, then 2 seconds later it disconnects. We really need to see a 2.6.37 usbmon trace to compare for differences. Can you try again? If usbmon isn't working, there's something _very_ strange going on. Alan Stern