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Subject: Re: USB devices on Dell TB16 dock stop working after resuming
To:     Mika Westerberg <mika.westerberg@linux.intel.com>
Cc:     Mario Limonciello <mario.limonciello@dell.com>,
        Andreas Noever <andreas.noever@gmail.com>,
        Michael Jamet <michael.jamet@intel.com>,
        Yehezkel Bernat <YehezkelShB@gmail.com>,
        Christian Kellner <ck@xatom.net>, linux-kernel@vger.kernel.org,
        Anthony Wong <anthony.wong@canonical.com>,
        Mathias Nyman <mathias.nyman@linux.intel.com>
References: <20191104142459.GC2552@lahna.fi.intel.com>
 <20191104144436.GD2552@lahna.fi.intel.com>
 <20191104154446.GH2552@lahna.fi.intel.com>
 <ea829adedf0445c0845e25d6e4b47905@AUSX13MPC105.AMER.DELL.COM>
 <d8cb6bc6-8145-eaed-5ba4-d7291478bdd7@molgen.mpg.de>
 <20191104162103.GI2552@lahna.fi.intel.com>
 <f0257624-920e-eec4-a2ec-7adf8ecbcc9d@molgen.mpg.de>
 <20191120105048.GY11621@lahna.fi.intel.com>
 <20191122105012.GD11621@lahna.fi.intel.com>
 <edfe1e3c-779b-61e4-8551-f2e13d46d733@molgen.mpg.de>
 <20191122112921.GF11621@lahna.fi.intel.com>
From:   Paul Menzel <pmenzel@molgen.mpg.de>
Message-ID: <ae67c377-4763-4648-a91c-b9351e3b1cf1@molgen.mpg.de>
Date:   Fri, 22 Nov 2019 12:33:44 +0100
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Dear Mika,


On 2019-11-22 12:29, Mika Westerberg wrote:
> On Fri, Nov 22, 2019 at 12:05:13PM +0100, Paul Menzel wrote:

>> On 2019-11-22 11:50, Mika Westerberg wrote:
>>> On Wed, Nov 20, 2019 at 12:50:53PM +0200, Mika Westerberg wrote:
>>>> On Tue, Nov 19, 2019 at 05:55:43PM +0100, Paul Menzel wrote:
>>
>>>>> On 2019-11-04 17:21, Mika Westerberg wrote:
>>>>>> On Mon, Nov 04, 2019 at 05:11:10PM +0100, Paul Menzel wrote:
>>>>>
>>>>>>> On 2019-11-04 16:49, Mario.Limonciello@dell.com wrote:
>>>>>>>
>>>>>>>>> From: Mika Westerberg <mika.westerberg@linux.intel.com>
>>>>>>>>> Sent: Monday, November 4, 2019 9:45 AM
>>>>>>>
>>>>>>>>> On Mon, Nov 04, 2019 at 04:44:40PM +0200, Mika Westerberg wrote=
:
>>>>>>>>>> On Mon, Nov 04, 2019 at 04:25:03PM +0200, Mika Westerberg wrot=
e:
>>>>>>>
>>>>>>>>>>> On Mon, Nov 04, 2019 at 02:13:13PM +0100, Paul Menzel wrote:
>>>>>>>
>>>>>>>>>>>> On the Dell XPS 13 9380 with Debian Sid/unstable with Linux =
5.3.7
>>>>>>>>>>>> suspending the system, and resuming with Dell=E2=80=99s Thun=
derbolt TB16
>>>>>>>>>>>> dock connected, the USB input devices, keyboard and mouse,
>>>>>>>>>>>> connected to the TB16 stop working. They work for a few seco=
nds
>>>>>>>>>>>> (mouse cursor can be moved), but then stop working. The lapt=
op
>>>>>>>>>>>> keyboard and touchpad still works fine. All firmware is up-t=
o-date
>>>>>>>>>>>> according to `fwupdmgr`.
>>>>>>>>>>>
>>>>>>>>>>> What are the exact steps to reproduce? Just "echo mem >
>>>>>>>>>>> /sys/power/state" and then resume by pressing power button?
>>>>>>>
>>>>>>> GNOME Shell 3.34.1+git20191024-1 is used, and the user just close=
s the
>>>>>>> display. So more than `echo mem > /sys/power/state` is done. What=

>>>>>>> distribution do you use?
>>>>>>
>>>>>> I have buildroot based "distro" so there is no UI running.
>>>>>
>>>>> Hmm, this is quite different from the =E2=80=9Cnormal=E2=80=9D use-=
case of the these devices.
>>>>> That way you won=E2=80=99t hit the bugs of the normal users. ;-)
>>>>
>>>> Well, I can install some distro to that thing also :) I suppose Debi=
an
>>>> 10.2 does have this issue, no?
>>>>
>>>>>>>>>> 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.
>>>>>>>>>
>>>>>>>>> Upgraded BIOS to 1.8.0 and TBT NVM to v44 but still can't repro=
duce this
>>>>>>>>> on my system :/
>>>>>>>
>>>>>>> The user reported the issue with the previous firmwares 1.x and T=
BT NVM v40.
>>>>>>> Updating to the recent version (I got the logs with) did not fix =
the issue.
>>>>>>
>>>>>> I also tried v40 (that was originally on that system) but I was no=
t able
>>>>>> to reproduce it.
>>>>>>
>>>>>> Do you know if the user changed any BIOS settings?
>>>>>
>>>>> We had to disable the Thunderbolt security settings as otherwise th=
e USB
>>>>> devices wouldn=E2=80=99t work at cold boot either.
>>>>
>>>> That does not sound right at all. There is the preboot ACL that allo=
ws
>>>> you to use TBT dock aready on boot. Bolt takes care of this.
>>>>
>>>> Are you talking about USB devices connected to the TB16 dock?
>>>>
>>>> Also are you connecting the TB16 dock to the Thunderbolt ports (left=

>>>> side of the system marked with small lightning logo) or to the norma=
l
>>>> Type-C ports (right side)?
>>>>
>>>>> So, I built Linux 5.4-rc8 (`make bindeb-pkg -j8`), but unfortunatel=
y the
>>>>> error is still there. Sometimes, re-plugging the dock helped, and s=
ometimes
>>>>> it did not.
>>>>>
>>>>> Please find the logs attached. The strange thing is, the Linux kern=
el detects
>>>>> the devices and I do not see any disconnect events. But, `lsusb` do=
es not list
>>>>> the keyboard and the mouse. Is that expected.
>>>>
>>>> I'm bit confused. Can you describe the exact steps what you do (so I=
 can
>>>> replicate them).
>>>
>>> I managed to reproduce following scenario.
>>>
>>> 1. Boot the system up to UI
>>> 2. Connect TB16 dock (and see that it gets authorized by bolt)
>>> 3. Connect keyboard and mouse to the TB16 dock
>>> 4. Both mouse and keyboard are functional
>>> 5. Enter s2idle by closing laptop lid
>>> 6. Exit s2idle by opening the laptop lid
>>> 7. After ~10 seconds or so the mouse or keyboard or both do not work
>>>    anymore. They do not respond but they are still "present".
>>>
>>> The above does not happen always but from time to time.
>>>
>>> Is this the scenario you see as well?
>>
>> Yes, it is. Though I=E2=80=99d say it=E2=80=99s only five seconds or s=
o.
>>
>>> This is on Ubuntu 19.10 with the 5.3 stock kernel.
>>
>> =E2=80=9Cstock=E2=80=9D in upstream=E2=80=99s or Ubuntu=E2=80=99s?
>=20
> It is Ubuntu's.
>=20
>>> I can get them work again by unplugging them and plugging back (leavi=
ng
>>> the TBT16 dock connected). Also if you run lspci when the problem
>>> occurs it still shows the dock so PCIe link stays up.
>>
>> Re-connecting the USB devices does not help here, but I still suspect =
it=E2=80=99s
>> the same issue.
>=20
> Yeah, sounds like so. Did you try to connect the device (mouse,
> keyboard) to another USB port?

I do not think I did, but I can=E2=80=99t remember. Next week would be th=
e next chance
to test this.

>> Yesterday, I had my hand on a Dell XPS 13 7390 (10th Intel generation)=
 and
>> tried it with the shipped Ubuntu 18.04 LTS. There, the problem was not=

>> always reproducible, but it still happened. Sometimes, only one of the=
 USB
>> device (either keyboard or mouse) stopped working.
>=20
> I suppose this is also with the TB16 dock connected, correct?

Correct.

Can I ask again, how the USB devices connected to the dock can be listed =
on
the command line? lsusb needs to be adapted for that or is a different
mechanism needed?


Kind regards,

Paul


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