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Bug#1117256: linux-image-6.12.48+deb13-amd64: Kernel can no longer activate ethernet on Dell WD19S docking station

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  Bug#1117256: linux-image-6.12.48+deb13-amd64: Kernel can no longer activate ethernet on Dell WD19S docking station Salvatore Bonaccorso <carnil@debian.org> - 2025-10-12 20:00 +0200
    Bug#1117256: linux-image-6.12.48+deb13-amd64: Kernel can no longer activate ethernet on Dell WD19S docking station Daniel <ganchya@gmail.com> - 2025-10-22 00:10 +0200
      Bug#1117256: linux-image-6.12.48+deb13-amd64: Kernel can no longer activate ethernet on Dell WD19S docking station Ben Hutchings <benh@debian.org> - 2025-10-23 00:10 +0200
        Bug#1117256: linux-image-6.12.48+deb13-amd64: Kernel can no longer activate ethernet on Dell WD19S docking station Daniel <ganchya@gmail.com> - 2025-10-23 22:00 +0200
    Bug#1117256: linux-image-6.12.48+deb13-amd64: Kernel can no longer activate ethernet on Dell WD19S docking station Salvatore Bonaccorso <carnil@debian.org> - 2025-11-01 17:50 +0100
      Bug#1117256: linux-image-6.12.48+deb13-amd64: Kernel can no longer activate ethernet on Dell WD19S docking station Florian Hars <florian@hars.de> - 2025-11-05 21:10 +0100

#89556 — Bug#1117256: linux-image-6.12.48+deb13-amd64: Kernel can no longer activate ethernet on Dell WD19S docking station

Control: tags -1 + moreinfo

Hi Florian,

On Sun, Oct 05, 2025 at 02:23:15PM +0200, Florian Hars wrote:
> Package: src:linux
> Version: 6.12.48-1
> Severity: normal
> 
> Dear Maintainer,
> 
> when booting connected to a Dell WD19D docking station, my laptop can no longer activate
> the ethernet interface of the docking station. If I then unplug the laptop from the
> docking station, connect another laptop running Windows 11 to the docking station, wait,
> until it has enummerated all devices, unplug and then replug the laptop running debian,
> the network is detected and works (I am using it to send this report).
> 
> The kernel log below misses the important bits, this is waht happened durin initial boot:

Thanks. With "no longer activate the ethernet interface" I assume this
means you can identify an earlier kernel revision which did not cause
the problem?

Two questions:

First please try to boot with the most current version available in
Debian unstable (6.16.11-1 right now), to see if the problem persist.

Secondly if you are able to pinpoint a range where the kernel
regressed, it would be great if you can bisect the changes between
those versions (if you need instructions let us know).

Regards,
Salvatore

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#89708

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Hi,

I think that I have a similar problem. I have a thinkpad X1 with a docking
station.

With Bookworm I was able to connect external USB hard drives to the docking
station. Now with Trixie the hard drives are not detected when the docking
station is connected to the laptop. Even if the hard drives are connected
directly to the laptop.

If I disconnect the docking station the hard drives are detected.

Thanks,
Daniel

On Sun, Oct 12, 2025 at 7:57 PM Salvatore Bonaccorso <carnil@debian.org>
wrote:

> Control: tags -1 + moreinfo
>
> Hi Florian,
>
> On Sun, Oct 05, 2025 at 02:23:15PM +0200, Florian Hars wrote:
> > Package: src:linux
> > Version: 6.12.48-1
> > Severity: normal
> >
> > Dear Maintainer,
> >
> > when booting connected to a Dell WD19D docking station, my laptop can no
> longer activate
> > the ethernet interface of the docking station. If I then unplug the
> laptop from the
> > docking station, connect another laptop running Windows 11 to the
> docking station, wait,
> > until it has enummerated all devices, unplug and then replug the laptop
> running debian,
> > the network is detected and works (I am using it to send this report).
> >
> > The kernel log below misses the important bits, this is waht happened
> durin initial boot:
>
> Thanks. With "no longer activate the ethernet interface" I assume this
> means you can identify an earlier kernel revision which did not cause
> the problem?
>
> Two questions:
>
> First please try to boot with the most current version available in
> Debian unstable (6.16.11-1 right now), to see if the problem persist.
>
> Secondly if you are able to pinpoint a range where the kernel
> regressed, it would be great if you can bisect the changes between
> those versions (if you need instructions let us know).
>
> Regards,
> Salvatore
>
>

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#89727

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Hi Daniel,

On Wed, 22 Oct 2025 00:01:52 +0200 Daniel <ganchya@gmail.com> wrote:
> Hi,
> 
> I think that I have a similar problem. I have a thinkpad X1 with a
docking
> station.
> 
> With Bookworm I was able to connect external USB hard drives to the
docking
> station. Now with Trixie the hard drives are not detected when the
docking
> station is connected to the laptop. Even if the hard drives are
connected
> directly to the laptop.
> 
> If I disconnect the docking station the hard drives are detected.
[...]

I'm fairly confident that this is not the same bug.  Please use the
"reportbug kernel" command to open a separate report about the problem
on your system.  We can always merge the 2 reports later if we decide
they are actually caused by the same bug.

Ben.

-- 
Ben Hutchings - Debian developer, member of kernel, installer and LTS
teams

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#89744

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Hi Ben,

Sorry, now it's working. I'm not sure why it didn't work before. I think
that I plugged the docking station after I turned on the computer.

Since I'm not able to reproduce the problem. I won't report the bug.

Thanks a lot,
Best,
Daniel

On Thu, Oct 23, 2025 at 12:05 AM Ben Hutchings <benh@debian.org> wrote:

> Hi Daniel,
>
> On Wed, 22 Oct 2025 00:01:52 +0200 Daniel <ganchya@gmail.com> wrote:
> > Hi,
> >
> > I think that I have a similar problem. I have a thinkpad X1 with a
> docking
> > station.
> >
> > With Bookworm I was able to connect external USB hard drives to the
> docking
> > station. Now with Trixie the hard drives are not detected when the
> docking
> > station is connected to the laptop. Even if the hard drives are
> connected
> > directly to the laptop.
> >
> > If I disconnect the docking station the hard drives are detected.
> [...]
>
> I'm fairly confident that this is not the same bug.  Please use the
> "reportbug kernel" command to open a separate report about the problem
> on your system.  We can always merge the 2 reports later if we decide
> they are actually caused by the same bug.
>
> Ben.
>
> --
> Ben Hutchings - Debian developer, member of kernel, installer and LTS
> teams
>

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#89865

Hi Florian,

On Sun, Oct 12, 2025 at 07:55:55PM +0200, Salvatore Bonaccorso wrote:
> Control: tags -1 + moreinfo
> 
> Hi Florian,
> 
> On Sun, Oct 05, 2025 at 02:23:15PM +0200, Florian Hars wrote:
> > Package: src:linux
> > Version: 6.12.48-1
> > Severity: normal
> > 
> > Dear Maintainer,
> > 
> > when booting connected to a Dell WD19D docking station, my laptop can no longer activate
> > the ethernet interface of the docking station. If I then unplug the laptop from the
> > docking station, connect another laptop running Windows 11 to the docking station, wait,
> > until it has enummerated all devices, unplug and then replug the laptop running debian,
> > the network is detected and works (I am using it to send this report).
> > 
> > The kernel log below misses the important bits, this is waht happened durin initial boot:
> 
> Thanks. With "no longer activate the ethernet interface" I assume this
> means you can identify an earlier kernel revision which did not cause
> the problem?
> 
> Two questions:
> 
> First please try to boot with the most current version available in
> Debian unstable (6.16.11-1 right now), to see if the problem persist.
> 
> Secondly if you are able to pinpoint a range where the kernel
> regressed, it would be great if you can bisect the changes between
> those versions (if you need instructions let us know).

Any news here? Additionally can you test 6.17.6-1 as it is now in
unstable as well?

Regards,
Salvatore

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#89929

On 11/1/25 17:41, Salvatore Bonaccorso wrote:
> Any news here? Additionally can you test 6.17.6-1 as it is now in
> unstable as well.

There were some Dell firmware updates since then, and I have not seen 
this behavior again.

And the original behavior was a bit weirder than I initially noticed, 
the laptop could activate the network interface if the whole system had 
been off and disconnected from mains for several hours and I then 
started it by switching on the power at the mains adapter.

I'd file it under weird incompatibility between some Dell firmware 
versions and some kernel versions, unless it occurs again.

Wish me luck :-).

Regards, Florian.

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