From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7ADC7C4338F for ; Tue, 24 Aug 2021 07:37:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5FD0D61248 for ; Tue, 24 Aug 2021 07:37:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234997AbhHXHh4 (ORCPT ); Tue, 24 Aug 2021 03:37:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:54726 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234797AbhHXHhu (ORCPT ); Tue, 24 Aug 2021 03:37:50 -0400 Received: by mail.kernel.org (Postfix) with ESMTPS id B421C61246 for ; Tue, 24 Aug 2021 07:37:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1629790626; bh=qwkc6pCJBdvJVUwl1IwmLcd8OS2PDWHFC1RtlVcV9KA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=gbuYdAtceZ5hQTYp9mDKzLnab7iVQmrypNEzwy89ahV6EqXSoUjFKcc/Qt99oYMkV 4BYUOvWHiNHPtGGC3pRO6bARfM3Xql2/O9adI6b+nWLqtMbmToxA3VzNzjBLHkmydG beir/OJCNUt1FE2Sw8QHfEn6fV3xLNqNoUF/HynS16WsaW2d7svdj8JNcNrEacrPeG ypF5vDlbK5ClvWdQAnPqPeCE8TnY16oW3MBnolT5NOkH5I2vtkXtH4nxI838nQyall N4PYtUQhDtHG2pj1dtlMw7hDiq0RSuF2aM2G3dQm9saGOlGMt47hkWNzblk3mtF4cW zqUzzOlhWddgA== From: bugzilla-daemon@bugzilla.kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 214021] The USB devices fail to be detected during boot Date: Tue, 24 Aug 2021 07:37:06 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: high X-Bugzilla-Who: chris.chiu@canonical.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=3D214021 --- Comment #13 from Chris Chiu (chris.chiu@canonical.com) --- Mathias, thanks for the analysis since I've ran out of ideas for debugging this. In my case, even a single line printk in either xhci-hub.c or hub.c before hub_power_on() can make difference (undetected -> detected). But I c= an always reproduce with the clean code. Let me know if there's any patch I can help test. Thanks --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=