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Date:   Tue, 8 Dec 2020 09:57:40 +0100
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From:   Greg KH <gregkh@linuxfoundation.org>
To:     Paul Menzel <pmenzel@molgen.mpg.de>
Cc:     Mathias Nyman <mathias.nyman@intel.com>,
        USB list <linux-usb@vger.kernel.org>,
        Mario Limonciello <mario.limonciello@dell.com>
Subject: Re: usb usb1-port10: disabled by hub (EMI?), re-enabling...
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On Tue, Dec 08, 2020 at 09:18:08AM +0100, Paul Menzel wrote:
> Dear Linux folks,
> 
> 
> On a Dell Precision 3540/0M14W7, BIOS 1.9.1 07/06/2020
> 
>     $ lspci -nn | grep -i usb
>     00:14.0 USB controller [0c03]: Intel Corporation Cannon Point-LP USB 3.1
> xHCI Controller [8086:9ded] (rev 30)
>     3a:00.0 USB controller [0c03]: Intel Corporation JHL6340 Thunderbolt 3
> USB 3.1 Controller (C step) [Alpine Ridge 2C 2016] [8086:15db] (rev 02)
> 
> at each boot Linux 5.6 to 5.9 logs the error below.
> 
>     [   95.528190] usb usb1-port10: disabled by hub (EMI?), re-enabling...
> 
> Everything seems to be fine, so I wonder, why this is level error. Is it a
> hardware error?

Yes, it is a hardware issue.

thanks,

greg k-h