evtouch works incorrectly when the screen is left or right rotated

I managed to fix this problem, which is confirmed by other users in some of the last posts of this thread
http://ubuntuforums.org/showthread.php?t=442483
Basically, I edited the evtouch.c source file in such a way that screen_width and screen_height are swapped if there is a left or right rotation. Unfortunately, this doesn't fix the problem for resolution changes.

Confirming the bug. Thanks for your effort gborzi.

how is that different to use the
Option "Rotate" "cw"
or
Option "Rotate" "ccw"
settings in xorg.conf (or with hal in intrepid) their purpose is exactly to rotate the calibration in such cases, does the patch above give any advantage over using these driver options ?

I tried the Rotate option with both values "cw" and "ccw", but they didn't worked. Frankly, I'm not sure to have understood what this option should do. Also, there is the problem with the resolution change.

the resolution shouldnt change at all if you only rotate it, it should just switch from 1280x800 to 800x1280, thats what the rotate CW (clockwise) and CCW (counter clockwise) options are supposed to catch.

Hello Olivier,
I know that the resolution doesn't change with a rotation, it's just a switch. I noticed that the incorrect behaviour *also* happens when I change the resolution, i.e. from 1280x800 to 1024x768.
As I wrote before, the Rotate option doesn't work, and what I mean by "I'm not sure to have understood" is that it looks strange (at least for me) to configure the touchscreen to make it only work when it is rotated. With the patch it works for any rotation.

I can confirm that this happens to me too. When I change the screen orientation to left or right with xrandr, it seems like the pointer position is calculated using the wrong coordinates on the wrong axis.

Will it be possible to have a fix for this in 8.10?

gborzi, could you post a link to the post where you have the patch for the evtouch driver? The thread you linked to is 100 pages long, and I have no idea where to start looking...

oh, sorry gborzi. I didn't notice the patch was attached to the bug report.

Anyway, will it be possible to have this fix included in hardy? Editing xorg.conf is not so fun, especially when it can be avoided.

Hello Nicolas,
in that thread I also posted a deb package (compiled for amd64) for xserver-xorg-input-evtouch built with the patch I suggested. The post is this one http://ubuntuforums.org/showpost.php?p=4945143&postcount=998
It can be useful if you've installed 64-bit ubuntu 8.04.

Actually, I would need it to work on 8.10 32 bits. I have a Fujitsu U810, and intrepid has apparently fixed a lot of things that were broken in 8.04, including touchscreen support and XRandR compatibility with Compiz. Unfortunately, Rotation still cannot really be used because it is only useful in tablet mode, where the only input method is the touchscreen, and this touchscreen bug screws it up.

Is there a tutorial somewhere that explains how to build your own package for ubuntu? I guess I'll just use my own package until this fix is released for 8.10

Hello Nicolas,
I've not written a tutorial for rebuilding the package with the suggested patch because nobody asked for it, until today. So, here is a brief howto:
1) make a build directory, move there and get the source for the original package:
mkdir mybuilddir (or whatever name you like)
cd mybuilddir
apt-get source xf86-input-evtouch
2) install the required build libraries
sudo apt-get build-dep xf86-input-evtouch
3) move to the patches directory and add the attached patch
cd xf86-input-evtouch-0.8.7/debian/patches
mv <where you downloaded the patch attached to this message>/09_lrrotation_fix.patch .
echo 09_lrrotation_fix.patch >> series
4) modify the debian/changelog file to have a different version number for the package
vi ../changelog
and add something like this
----
xf86-input-evtouch (0.8.7-3ubuntu2) hardy; urgency=low

  * Adds a patch to fix left and right screen rotation

 -- Giuseppe Borzi <email address hidden> Fri, 09 May 2008 14:32:28 +0200

----
5) go to the xf86-input-evtouch-0.8.7 directory and start the building process
cd ../..
dpkg-buildpackage -rfakeroot (perhaps you'll need to install fakeroot, I don't remember if it's installed by build-essential)

In a short time the package should be compiled, don't worry if it complains about the inability to sign the package.
Please let me know of any problem you encounter following this howto. It surely works on 8.04, hope it'll work on 8.10.

Thanks, I was able to build the package myself and confirm that it works. I read the whole Packaging guide and your short tutorial to learn how to do it with debuild and quilt.

I have noticed another problem though. My touch panel is slightly wider than my display panel, while being exactly the same height. this means that the calibration of the X axis reports the leftmost and rightmost areas of the touch panel as negative pixel positions because my stylus touches the touch panel, but is not actually over the LCD screen. This works great in normal mode.

When I turn the screen to the left/right with XRandR the calibration of the X axis is applied to the Y axis and vice-versa, which means that I can never really reach the edges of my screen in one direction, and reach it too quickly in the other. I'll have a look at that evtouch.c to see how I can fix that additional problem.

Unless somebody else has another way to solve the problem, of course.

Nicolas: perhaps the calibration values aren't getting transformed? I will build and test the patch, and try to understand what's going on with the calibration values (I will need this I think because I have fairly large corrections in my toughbook T2 config). Thanks for jumping on this issue gborzi, this driver doesn't get enough attention. I'd like to see a single upstream source for it. Right now there is conan and Debian has their own funky git repository, with much drift. Maybe conan could be convinced to put his work on github or something.

Kenan just made a new release of evtouch (0.8.8) including gborzi's patch see http://www.conan.de/touchscreen/CHANGELOG.evtouch

a package including teh fix (xf86-input-evtouch_0.8.7-4build1.1) was just uploaded to intrepid-proposed, please test and give feedback so it can be moved to intrepid-updates asap

Oli, I rejected your upload. Please use an ubuntu version number (introduces changes) and run update-maintainer, so that the package conforms to the Maintainer policy and can be copied to jaunty as well (no separate jaunty upload necessary).

Was this sent to upstream?

Using evtouch 0.8.8 on the Ibex, binaries downloaded from www.conan.de/touchscreen/evtouch.html. It solves (wonderfully) the bug, but I don't know how to make the driver recognize my "ink" output. In other words, I can't drag anything with the pen like I can with 0.8.7 provided by Ubuntu.

I consider the upgrade to 0.8.8 a priority for the Ibex, because 0.8.8 solves another annoying issue I had with my tx1000: low resolution scanning. With 0.8.7, the pen input for programs like Xournal is... jerky. With 0.8.8 is as smooth as Vista.

This bug was fixed in the package xf86-input-evtouch - 0.8.8-0ubuntu1

---------------
xf86-input-evtouch (0.8.8-0ubuntu1) jaunty; urgency=low

  * New upstream release, packaged by Thomas Jaeger (<email address hidden>)
    Thanks a lot for fixing the header issues !! (LP: #312098)
    - fix rotation issues (LP: #222164)
  * 20_fix_calibrate_submission_directions.patch, point lshal submission to a
    LP bug instead of pointing people to a subscription only
    mailing list (LP: #307503)

 -- Oliver Grawert <email address hidden> Wed, 14 Jan 2009 14:04:58 -0500

Marvellous. Now everyone is waiting for the Intrepid backport.

Thanks, Thomas. This is going on route!

A backport for Intrepid would be very useful!

Confirmed!
I need that backport too - tried it already myself using Prevu v.0.5.0 from Repos but failed due to a error during compilation:
"...
make[2]: Entering directory `/var/cache/prevu/src/23898/xf86-input-evtouch-0.8.8'
/bin/bash ./libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -DXINPUT -Wall -g -O2 -I/usr/include/xorg -I/usr/include/pixman-1 -Wall -g -O2 -MT evtouch_drv_la-evtouch.lo -MD -MP -MF .deps/evtouch_drv_la-evtouch.Tpo -c -o evtouch_drv_la-evtouch.lo `test -f 'evtouch.c' || echo './'`evtouch.c
libtool: compile: gcc -DHAVE_CONFIG_H -I. -DXINPUT -Wall -g -O2 -I/usr/include/xorg -I/usr/include/pixman-1 -Wall -g -O2 -MT evtouch_drv_la-evtouch.lo -MD -MP -MF .deps/evtouch_drv_la-evtouch.Tpo -c evtouch.c -fPIC -DPIC -o .libs/evtouch_drv_la-evtouch.o
evtouch.c: In function 'EVTouchProcessRel':
evtouch.c:354: warning: unused variable 'dummy'
evtouch.c: In function 'DeviceInit':
evtouch.c:656: warning: passing argument 3 of 'InitValuatorClassDeviceStruct' makes pointer from integer without a cast
evtouch.c:656: error: too few arguments to function 'InitValuatorClassDeviceStruct'
evtouch.c: In function 'ConvertProc':
evtouch.c:935: warning: ignoring return value of 'write', declared with attribute warn_unused_result
evtouch.c:936: warning: ignoring return value of 'write', declared with attribute warn_unused_result
make[2]: *** [evtouch_drv_la-evtouch.lo] Error 1
make[2]: Leaving directory `/var/cache/prevu/src/23898/xf86-input-evtouch-0.8.8'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/var/cache/prevu/src/23898/xf86-input-evtouch-0.8.8'
make: *** [build-stamp] Error 2
dpkg-buildpackage: failure: debian/rules build gave error exit status 2
..."

So please provide help.

Wontfix in intrepid at this point...