Re: 7.1 regression bisected to "usb: core: Fix SuperSpeed root hub wMaxPacketSize"

["Michel Dänzer" <michel.daenzer@mailbox.org>]

On 7/2/26 14:22, Greg Kroah-Hartman wrote:
> On Thu, Jul 02, 2026 at 02:20:05PM +0200, Michel Dänzer wrote:
>> On 7/2/26 10:51, Michal Pecio wrote:
>>> On Thu, 2 Jul 2026 00:09:42 +0300, Mathias Nyman wrote:
>>>> On 7/1/26 19:02, Michel Dänzer wrote:
>>>>>
>>>>> The ethernet port of a Lenovo ThinkPad USB-C Dock Gen2 connected to
>>>>> a ThinkPad P14s Gen 5 AMD stopped working in 7.1.
>>>>>
>>>>>   ip addr show enx482ae347e7c3
>>>>>
>>>>> says the interface doesn't exist. The only thing about it in dmesg
>>>>> is:
>>>>>
>>>>>   r8152 8-1.1:1.0 enx482ae347e7c3: renamed from eth0
>>>>>
>>>>> In previous kernels, dmesg had more lines about it:
>>>>>
>>>>>   r8152 8-1.1:1.0 enx482ae347e7c3: renamed from eth0
>>>>>   r8152 8-1.1:1.0 enx482ae347e7c3: carrier on
>>>>>   r8152 8-1.1:1.0 enx482ae347e7c3: carrier off
>>>>>   r8152 8-1.1:1.0 enx482ae347e7c3: carrier on
>>>>>
>>>>>
>>>>> I bisected this to d1e280334b7f ("usb: core: Fix SuperSpeed root
>>>>> hub wMaxPacketSize"). Reverting that commit on top of 7.1.2 fixes
>>>>> the issue.
>>>
>>> Incredibly bizarre, I wonder if it's some userspace madness.
>>
>> That reminded me that I'm using (an older upstream version of) usbguard. Unfortunately its GUI notifications when it blocks a USB device aren't working reliably currently.
>>
>> Manually firing up its settings app revealed that it was indeed blocking the USB3 hub. Overriding it to be allowed fixed the issue with the bisected commit.
>>
>> Looks like a false alert after all, sorry for the noise, and thanks for the help.
> 
> Thanks for letting us know, and this isn't the first time that usbguard
> has caused a problem recently.  Did we change something that broke it's
> functionality?

My assumption is that this change results in usbguard considering the USB3 hub a different device, so the persistent settings to allow it no longer applied.


-- 
Earthling Michel Dänzer       \        GNOME / Xwayland / Mesa developer
https://redhat.com             \               Libre software enthusiast