From: Greg KH <gregkh@linuxfoundation.org>
To: Jorge Fernandez Monteagudo <jorgefm@cirsa.com>
Cc: "kernelnewbies@kernelnewbies.org" <kernelnewbies@kernelnewbies.org>
Subject: Re: USB resets
Date: Tue, 20 Apr 2021 09:22:43 +0200 [thread overview]
Message-ID: <YH6BQ8spag0VHn/m@kroah.com> (raw)
In-Reply-To: <DB9PR10MB45226EE711E53D59D4E98AAAA1489@DB9PR10MB4522.EURPRD10.PROD.OUTLOOK.COM>
On Tue, Apr 20, 2021 at 07:17:10AM +0000, Jorge Fernandez Monteagudo wrote:
> Hi all,
>
> I'm using an ancient 4.17.1 kernel and I'm seeing an weird USB behavior. A touchscreen device is been detected and disconnected in a 4 seconds pattern.
>
> # dmesg | grep 1.3.2[ 2.170041] usb 1-1.3.2: new full-speed USB device number 6 using ehci-pci
> [ 2.254868] input: Silicon Works Multi-touch SW4101C as /devices/pci0000:00/0000:00:12.0/usb1/1-1/1-1.3/1-1.3.2/1-1.3.2:1.0/0003:29BD:4101.0001/input/input2
> [ 2.254958] hid-multitouch 0003:29BD:4101.0001: input: USB HID v1.00 Mouse [Silicon Works Multi-touch SW4101C] on usb-0000:00:12.0-1.3.2/input0
> [ 6.776320] usb 1-1.3.2: USB disconnect, device number 6
Bad hardware, the kernel can not cause a disconnect :(
Do you have a flaky cable or underpowerd hub here?
thanks,
greg k-h
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next prev parent reply other threads:[~2021-04-20 7:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-20 7:17 USB resets Jorge Fernandez Monteagudo
2021-04-20 7:22 ` Greg KH [this message]
2021-04-20 7:41 ` Jorge Fernandez Monteagudo
2021-04-20 8:52 ` Greg KH
2021-04-22 7:32 ` Jorge Fernandez Monteagudo
2021-04-22 8:03 ` Greg KH
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