From owner-freebsd-usb@freebsd.org Mon Dec 21 13:28:05 2020 Return-Path: Delivered-To: freebsd-usb@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id EEBF94BAEC1 for ; Mon, 21 Dec 2020 13:28:05 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 4D00dx6FyZz3LdT for ; Mon, 21 Dec 2020 13:28:05 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id D51AE4BA9F1; Mon, 21 Dec 2020 13:28:05 +0000 (UTC) Delivered-To: usb@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D4E434BAD37 for ; Mon, 21 Dec 2020 13:28:05 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4D00dx5dyQz3LbV for ; Mon, 21 Dec 2020 13:28:05 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id B4A8C22631 for ; Mon, 21 Dec 2020 13:28:05 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 0BLDS5qc051596 for ; Mon, 21 Dec 2020 13:28:05 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 0BLDS5jS051595 for usb@FreeBSD.org; Mon, 21 Dec 2020 13:28:05 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 251503] Disconnecting/reconnecting USB-C dock makes other USB ports unusable Date: Mon, 21 Dec 2020 13:28:05 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: usb X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: ali.abdallah@suse.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: usb@FreeBSD.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://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 21 Dec 2020 13:28:06 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D251503 --- Comment #3 from Ali Abdallah --- The attachment order of usb hubs is somehow broken when the dock is unplugg= ed and plugged again. When the system is first booted, on xhci0@pci0:6:0:3 I have: xhci0 usbus1 uhub0 uhub3 uhub5 uhub6 uhid0 uhid1 uaudio0 pcm4 But when I unplug/re-plug the dock, I get=20 xhci0 usbus1 uhub0 uhub3 uhub5 When all USB devices on the dock were correctly detected, uhub5 was a child= of uhub3 and not of uhub0. On system boot: uhub5 on uhub3 uhub5: on usb= us1 uhub5: MTT enabled uhub5: 4 ports with 3 removable, self powered When the dock is unplugged/replugged again: uhub5: detached uhub5 on uhub0 uhub5: on usb= us1 And no devices attached to the dock are detected.=20 BTW: I tried out Dragon Fly 5.8.3 since it has similar USB implementation to FreeBSD, and the issue doesn't happen, uhub5 remains child of uhub3 and uhu= b6 child of uhub5, with all USB devices being correctly detected when the dock= is unplugged/plugged back. Unfortunately I know little about the USB stack, could you please provide s= ome hints on how to proceed here? --=20 You are receiving this mail because: You are the assignee for the bug.=