Date: Mon, 21 Dec 2020 13:28:05 +0000 From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 251503] Disconnecting/reconnecting USB-C dock makes other USB ports unusable Message-ID: <bug-251503-19105-OARCST7n0K@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-251503-19105@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251503 --- Comment #3 from Ali Abdallah <ali.abdallah@suse.com> --- The attachment order of usb hubs is somehow broken when the dock is unplugged 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 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: <VIA Labs, Inc. USB2.0 Hub, class 9/0, rev 2.10/d.23, addr 3> on usbus1 uhub5: MTT enabled uhub5: 4 ports with 3 removable, self powered When the dock is unplugged/replugged again: uhub5: detached uhub5 on uhub0 uhub5: <VIA Labs, Inc. USB3.1 Hub, class 9/0, rev 3.10/d.24, addr 2> on usbus1 And no devices attached to the dock are detected. 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 uhub6 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 some hints on how to proceed here? -- You are receiving this mail because: You are the assignee for the bug.help
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