linux-kernel - Re: touchscreen wirh 2.6.26

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Date:	Fri, 27 Nov 2009 19:36:06 +0200
From:	Alex Custov <alex.custov@...il.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: touchscreen wirh 2.6.26

2009/11/27 Jiri Kosina <jkosina@...e.cz>:
> On Fri, 27 Nov 2009, Alex Custov wrote:
>
>> >> I have Acer T230H on Debian Lenny with 2.6.26.8 manually complied
>> >> kernel. The problem is that this is a multitouch monitor and it seems
>> >> that it doesn't work at all (even single touches). All things under
>> >> "Drivers => Input device support => Touchscreens" are enabled in kernel
>> >> (as modules). Is this type of monitor supported, or I should upgrade to
>> >> a newer kernel? Thanks.
>> >
>> > How is the touchscreen conntected to system? Is it USB? If so, what is the
>> > vendor and product ID? (lsusb will tell).
>>
>> Hi. Thanks for answer. I've already found the /dev device it has - it
>> is /dev/usb/hiddev0. Yes, it is USB connected. I did "cat
>> /dev/usb/hiddev0" and touched some points on the screen, it seems that
>> it works (I got some binary data from 'cat'). Now I will try to add
>> the corresponding section to the xorg.conf to let it work in X.
>
> It might not be that trivial -- /dev/usb/hiddev0 gives you only
> more-or-less raw HID data, but they have still to be interpreted somehow
> to make sense.
>
> If the device is implementing some vendor-specific (or device-specific)
> protocol, then the data you see coming through hiddev0 might not be useful
> at all directly in X.
>
> Repeating from my previous mail -- please provide the idVendor/idProduct
> (found by lsusb -v) for this device. It might be supported in later
> kernels, but without this information, it's impossible to tell.
>
> --
> Jiri Kosina
> SUSE Labs, Novell Inc.
>

Here you are:

Bus 004 Device 002: ID 0408:3000 Quanta Computer, Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x0408 Quanta Computer, Inc.
  idProduct          0x3000
  bcdDevice            0.00
  iManufacturer           1 Acer
  iProduct                2 T230H
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.10
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength     210
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               8
Device Status:     0x0000
  (Bus Powered)

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