From: Bjorn Helgaas <helgaas@kernel.org>
To: linux-pci@vger.kernel.org
Cc: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Lukas Wunner" <lukas@wunner.de>
Subject: Re: [Bug 219906] New: Kernel Oops in pcie_update_link_speed when hotplugging TB4 dock on x870e / kernel 6.14.0-rc7
Date: Fri, 21 Mar 2025 14:15:04 -0500 [thread overview]
Message-ID: <20250321191504.GA1139362@bhelgaas> (raw)
In-Reply-To: <bug-219906-41252@https.bugzilla.kernel.org/>
On Fri, Mar 21, 2025 at 06:30:40PM +0000, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=219906
>
> Bug ID: 219906
> Summary: Kernel Oops in pcie_update_link_speed when hotplugging
> TB4 dock on x870e / kernel 6.14.0-rc7
> Created attachment 307878
> --> https://bugzilla.kernel.org/attachment.cgi?id=307878&action=edit
> dmesg output hotplugging dock
>
> When connecting a Lenovo TB4 dock (40B0) using the USB4 port of an ASRock x870E
> Nova motherboard, Linux kernel 6.14.0-rc7 will Oops with a NULL pointer
> dereference.
>
> This is 100% reproducible on my system and happens immediately when plugging
> the USB4 cable into the docking station. Interestingly, USB devices connected
> to the docking station still work, but displays connected to it will not. Also,
> after the kernel Oops the system is in some corrupted state, as things like
> mkinitcpio will hang at the autodetect hook when enumerating udev devices, and
> when shutting down the system will get stuck indefinitely on hanging
> udev_worker processes.
>
> When booting the machine while the dock is already attached, the kernel boots
> without any apparent problems, but displays connected to the dock will still
> not show any image.
>
> This dock has been working without any issue in combination with a different
> Linux laptop with USB4 and an AMD780M, a MacBook Pro, and a Windows 11 laptop.
>
> Attached is the dmesg output after hot-plugging the dock.
Do you know whether this is a regression? Does any kernel work
correctly on the system in question?
next parent reply other threads:[~2025-03-21 19:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-219906-41252@https.bugzilla.kernel.org/>
2025-03-21 19:15 ` Bjorn Helgaas [this message]
2025-03-21 19:35 ` [Bug 219906] New: Kernel Oops in pcie_update_link_speed when hotplugging TB4 dock on x870e / kernel 6.14.0-rc7 Lukas Wunner
2025-03-21 19:41 ` Wouter Bijlsma
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