linux-kernel - Re: USB devices on Dell TB16 dock stop working after resuming

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Date:   Mon, 4 Nov 2019 16:44:36 +0200
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
Cc:     Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        Christian Kellner <ck@...om.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mario Limonciello <mario.limonciello@...l.com>
Subject: Re: USB devices on Dell TB16 dock stop working after resuming

On Mon, Nov 04, 2019 at 04:25:03PM +0200, Mika Westerberg wrote:
> Hi,
> 
> On Mon, Nov 04, 2019 at 02:13:13PM +0100, Paul Menzel wrote:
> > Dear Linux folks,
> > 
> > On the Dell XPS 13 9380 with Debian Sid/unstable with Linux 5.3.7
> > suspending the system, and resuming with Dell’s Thunderbolt TB16
> > dock connected, the USB input devices, keyboard and mouse,
> > connected to the TB16 stop working. They work for a few seconds
> > (mouse cursor can be moved), but then stop working. The laptop
> > keyboard and touchpad still works fine. All firmware is up-to-date
> > according to `fwupdmgr`.
> 
> What are the exact steps to reproduce? Just "echo mem >
> /sys/power/state" and then resume by pressing power button?

I tried v5.4-rc6 on my 9380 with TB16 dock connected and did a couple of
suspend/resume cycles (to s2idle) but I don't see any issues.

I may have older/different firmware than you, though.