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 CCEE8C4338F for ; Wed, 18 Aug 2021 05:48:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9AA4561076 for ; Wed, 18 Aug 2021 05:48:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237788AbhHRFtb (ORCPT ); Wed, 18 Aug 2021 01:49:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:36832 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237618AbhHRFta (ORCPT ); Wed, 18 Aug 2021 01:49:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPS id 5514A61076 for ; Wed, 18 Aug 2021 05:48:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1629265736; bh=Uu4+2tbWMZjPCvQnd2LuTBiryxEDZT6MEWyJXo4NC+4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=CH2redIXt93jOUgrY2tTVfmSrnqQhuahQ3aktApFj1IUdarY3dxrWqzWR2wj4Oct8 HWkMVkIGQ/+sUK2Bf8i71aUPKBPEiB7KMH+VIwRrsSuM0bN4hMN0gAHY73JZU/XBsR N2J69vjAdMwM48D4kLIpeMRGGRlRVnjHrNxk7Eeia0QmNpQIvjN6qKwMU9nE1A53QH BvoM6Azyl4FTIr5qcAL+lzZ1SN5hyuAnlr4BDcte6ZLCh7bDXebMhF51sj3/+W+9KQ s5dnV3UVGKvdiIkn3vkrFTkMUoUGBT2Es+u4tQL8J7BsJmz0OmPt6FvkCt6L12Cinz nTi2cqpq1N4tw== 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: Wed, 18 Aug 2021 05:48:56 +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 #8 from Chris Chiu (chris.chiu@canonical.com) --- After lots of experiments, I agree the commit is not the root cause. Since = the commit applied on 5.11 has no problem, but it happens when applying this co= mmit on 5.4 base. The confusing part is, I can't reproduce it by enabling the dynamic debug on xhci-hcd even with the kernel 5.4 base. I'm still trying to find out what exactly commit cause the difference. --=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.=