[Build] Touch Panels

[Zedd Epstein]

The IBM one is hooked up via USB, not serial. I meant to send you an email,
but forgot.

Zedd

On Sun, Sep 27, 2009 at 8:43 PM, <nils at shkoo.com> wrote:

> I got the netboot image working to automatically start X windows and enable
> the touch screen.
>
> Of the three laptops set up on the table, here is the status of each:
>
> Left one, IBM laptop:
>
> Display seems to work OK.  Touchscreen does not supply any serial data.
> Unknown reason.  Suspect problem with touchscreen.
>
> Middle one, dell laptop:
>
> When external VGA cable is plugged in, it doesn't seem to display anything
> on the internal LCD nor on the external touchscreen.  When the external VGA
> cable is unplugged, displays X windows on internal LCD but allows external
> touchscreen for navigation.
>
> Right one, toshiba laptop:
>
> Display works ok, touch functionality works ok.  A little jittery; seems to
> like to return to the upper left corner upon touch release.
>
> -nils
>
>
> On Sat, 26 Sep 2009 nils at shkoo.com wrote:
>
>  On Sat, 26 Sep 2009, Zedd Epstein wrote:
>>
>>> I have 4 laptops net booting, with touch screens connected to them. Video
>>> works, net boot works, touching them doesn't work. I'm using the usb to
>>> serial adapters that nils bought. Any guesses?
>>>
>>
>> Hi,
>>
>> They do not work automatically upon bootup yet.  Manual intervention is
>> still required to get them to work after bootup.  I'll be at 2169 tomorrow
>> and I'll work on polishing.
>>
>> If you have a spare windows box we could reverse engineer the driver on
>> that would be super helpful, or if you want to do it yourself by going to
>> the www.inexio.co.uk website.  It would be nice to upgrade the firmware
>> if
>> there's some way to do that, since I think it was a firmware problem that
>> was causing the glitchy cursor.  But it would be nice to compare and
>> contrast how well the windows driver works.
>>
>> There are two methods of setting up the drivers for the touchscreen. I've
>> gotten movement to work with both methods.  Producing a button-down event
>> from touching the screen works under some conditions with the 1st method
>> ("evtouch" with the kernel module), but I haven't gotten it to work at all
>> with the second ("xf86-input-inexio").
>>
>> On the "s1" server, /netboot/config contains the debian live config tree
>> for building netboot images.  Running /netboot/build.sh builds and
>> installs a debian live image based on that config tree.  Subsequent to
>> running build.sh, anything netbooting off of s1 will get the new image.
>> (And anything currently netbooted off of s1 will likely get confused).
>>
>> /netboot/config is managed with mercurial, so if you change it please
>> commit oyur changes with an appropriate email address and comment so
>> anyone who's working on it knows what's going on.
>>
>> You can use "lh_config" and friends to add/change /netboot/config, but I
>> find it easier to just edit the files manually.
>>
>> Anyways, there are two touchscreen drivers that get included in the image:
>>
>> 1) "evtouch", which takes input from the linux "inexio" kernel driver.
>>   Here are the steps to use this driver after booting up:
>>
>> a. Copy s1:/srv/debian-live/inexio-module onto the netboot client (I
>> forget where it's mounted) and build "inexio.ko" and the custom version of
>> "inputattach".
>>
>> b. insmod inexio.ko
>>
>> c. use the custom inputattach to "inputattach --inexio /dev/ttyUSB0" to
>> point the kernel driver at the right serial device
>>
>> d. Use /etc/X11/xorg.conf.new (which may require some hacking; I'm not
>> sure I've gotten everything right there) to start
>> x-windows
>>
>> 2) "xf86-input-inexio", which is a X-windows input driver that reads
>> directly from serial. Here are the steps to use this driver:
>>
>> a. The xf86-input-inexio package should be already installed; if not, copy
>> s1:/srv/debian-live/xf86-input-inexio and build it on the netboot client.
>>
>> b. Edit the x11 config as shown in "man 4 inexio". You will want to use
>> /dev/ttyUSB0 to use the rs232 to usb adapter.
>>
>> Otherwise I'll be in tomorrow to attempt to get the netbooting to
>> automatically touchscreenize seamlessly.
>>
>> -nils
>> _______________________________________________
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>>
>>
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