USB resets

[Greg KH]

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