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Date:   Mon, 29 Apr 2019 23:13:47 +0300
From:   Mika Westerberg <>
To:     Michael Hirmke <>
        Christian Kellner <>
Subject: Re: [REGRESSION 5.0.8] Dell thunderbolt dock broken (xhci_hcd and

On Mon, Apr 29, 2019 at 10:03:00PM +0200, Michael Hirmke wrote:
> Hi all,
> >On Mon, Apr 29, 2019 at 09:47:15PM +0200, Takashi Iwai wrote:
> >> Hi,
> >Hi,
> >> we've got a regression report wrt xhci_hcd and thunderbolt on a Dell
> >> machine.  5.0.7 is confirmed to work, so it must be a regression
> >> introduced by 5.0.8.
> >>
> >> The details are found in openSUSE Bugzilla entry:
> >>
> >>
> [...]
> >>
> >> I blindly suspected the commit 3943af9d01e9 and asked for a reverted
> >> kernel, but in vain.  And now it was confirmed that the problem is
> >> present with the latest 5.1-rc, too.
> >>
> >> I put some people who might have interest and the reporter (Michael)
> >> to Cc.  If anyone has an idea, feel free to join to the Bugzilla, or
> >> let me know if any help needed from the distro side.
> >Since it exists in 5.1-rcX also it would be good if someone
> >who see the problem (Michael?) could bisect it.
> I know the meaning of bisecting, but I'm not really a developer, so I am
> probably not able to interpret the results.

No worries. 

I'm adding Christian who reported similar (same?) problem last week.
Christian, this seems to exist in v5.1-rc6 at least. Can you try to
bisect it on your side?

I also have XPS 9370 but not that particular dock. I will check tomorrow
if I can reproduce it as well.

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