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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Tue, 19 Nov 2019 18:20:08 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Mario Limonciello <mario.limonciello@...l.com>,
        Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        Christian Kellner <ck@...om.net>, linux-kernel@...r.kernel.org,
        Anthony Wong <anthony.wong@...onical.com>
Subject: Re: USB devices on Dell TB16 dock stop working after resuming

[Linux 5.4-rc8 messages attached]

On 2019-11-19 17:55, Paul Menzel wrote:
> Dear Mika,
> 
> 
> 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@...l.com wrote:
>>>
>>>>> From: Mika Westerberg <mika.westerberg@...ux.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 wrote:
>>>
>>>>>>> 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’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?
>>>
>>> GNOME Shell 3.34.1+git20191024-1 is used, and the user just closes 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 “normal” use-case of the these devices.
> That way you won’t hit the bugs of the normal users. ;-)
> 
>>>>>> 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 reproduce this
>>>>> on my system :/
>>>
>>> The user reported the issue with the previous firmwares 1.x and TBT 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 not able
>> to reproduce it.
>>
>> Do you know if the user changed any BIOS settings?
> 
> We had to disable the Thunderbolt security settings as otherwise the USB
> devices wouldn’t work at cold boot either.
> 
> So, I built Linux 5.4-rc8 (`make bindeb-pkg -j8`), but unfortunately the
> error is still there. Sometimes, re-plugging the dock helped, and sometimes
> it did not.
> 
> Please find the logs attached. The strange thing is, the Linux kernel detects
> the devices and I do not see any disconnect events. But, `lsusb` does not list
> the keyboard and the mouse. Is that expected.
> 
> Additionally, despite `CONFIG_PCI_DEBUG` I do not see more elaborate messages.
> 
> Lastly, could the daemon boltd have anything to do with this?
> 
> ```
> $ boltctl --version
> bolt 0.8
> $ boltctl list
>  ● Dell Thunderbolt Cable
>    ├─ type:          peripheral
>    ├─ name:          Dell Thunderbolt Cable
>    ├─ vendor:        Dell
>    ├─ uuid:          0082b09d-2f5f-d400-ffff-ffffffffffff
>    ├─ status:        authorized
>    │  ├─ domain:     ca030000-0090-8708-2328-211e02222a24
>    │  └─ authflags:  none
>    ├─ authorized:    Tue 19 Nov 2019 11:35:11 AM UTC
>    ├─ connected:     Tue 19 Nov 2019 11:35:11 AM UTC
>    └─ stored:        Fri 13 Sep 2019 01:00:25 PM UTC
>       ├─ policy:     auto
>       └─ key:        no
> 
>  ● Dell Thunderbolt Dock
>    ├─ type:          peripheral
>    ├─ name:          Dell Thunderbolt Dock
>    ├─ vendor:        Dell
>    ├─ uuid:          10d34968-1d46-8680-ffff-ffffffffffff
>    ├─ status:        authorized
>    │  ├─ domain:     ca030000-0090-8708-2328-211e02222a24
>    │  └─ authflags:  none
>    ├─ authorized:    Tue 19 Nov 2019 11:35:11 AM UTC
>    ├─ connected:     Tue 19 Nov 2019 11:35:11 AM UTC
>    └─ stored:        Fri 13 Sep 2019 01:01:02 PM UTC
>       ├─ policy:     auto
>       └─ key:        no
> 
> ```
> 
> 
> Kind regards,
> 
> Paul
> 
> 
> 
> PS: Suspending the device with the dock attached, and unplugging the dock the
> power button LED lights up, but the screen stays black and the device needs
> to be forcefully powered off by pressing the power button for 12(?) seconds.

View attachment "20191119-connect-dock-after-resume.txt" of type "text/plain" (129340 bytes)

Download attachment "smime.p7s" of type "application/pkcs7-signature" (5174 bytes)