Re: PROBLEM: Kernel version 3.2.1 usb touchscreen device notrecognised [UDEV? USBINPUT? HOOK]

From: Greg KH
Date: Fri Jan 20 2012 - 11:02:17 EST


On Fri, Jan 20, 2012 at 07:13:54PM +1100, Padfoot wrote:
> Upgrade from kernel 3.1.9 to 3.2.1 eGalax usb touchscreen device is
> no longer recognised.
>
> Device is an Acer Iconia Tab w501 with inbuilt touchscreen. Screen
> is a pci device but is connected on boot as a usb input device.
> Issue appears to be with either UDEV or USBINPUT boot hook failing
> to recognise the device as can be seen in the dmesg.3.2.1
> attachment.
>
> Downgrading to kernel 3.1.9 corrects the issue.

Can you run 'git bisect' between 3.1.0 and 3.2.0 to find the problem
commit here?

Also, you might want to cc: the linux-input developers, they can help
you out much better than the general list can.

greg k-h
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