Re: PROBLEM: Kernel version 3.2.1 usb touchscreen device not recognised[UDEV? USBINPUT? HOOK]
From: Padfoot
Date: Fri Jan 20 2012 - 16:53:42 EST
On 21/01/12 07:44, Greg KH wrote:
On Sat, Jan 21, 2012 at 07:13:58AM +1100, Padfoot wrote:
On 21/01/12 03:02, Greg KH wrote:
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
Hi Greg,
I am not a kernel dev, nor have I ever compiled a kernel, so I don't
think I am able to help with a git bisect to locate the offending
commit. I am just a regular user running pre-compiled packages on my
Arch Linux distro. But, of course I am happy to assist wherever I
can.
If you want to build your own kernel, there are lots of instructions on
how do this online (google for 'linux kernel in a nutshell' for a free
book about this.)
Otherwise, can you file a bug with the arch linux developers? They
might be able to help you out here better as you are using a distro
kernel.
good luck,
greg k-h
Thanks for your assistance Greg. Benjamin in linux-input has provided
the solution. This can be marked as solved.
Thank you.
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