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[Plippo <637874@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-input-evdev

Using Maverick beta with all recent updates, my touchscreen (eGalax/DWAV
screen found in Eee PC T101MT) doesn't work as well as in Lucid.

Expected: All touches should be registered and turned into mouse
movement/clicks and varying pressure on the screen should result in
different opacity in GIMP and Mypaint and different line width in
Xournal.

What happens: Every third/fourth touch on the screen is simply ignored -
neither is the mouse pointer moved nor a click registered. Pressure
sensitivity doesn't work (tested in GIMP, Xournal, Mypaint): everything
is drawn with the lowest pressure level, thus no lines can be drawn in
GIMP. xinput shows that the pressure axis always reports a value of 1.
evtest shows that the kernel sends the correct information: pressure
information and all touches are reported.

Manually compiling evdev (using the sources obtained by apt-get source,
thus the same version Maverick uses) without the Ubuntu patches fixes
both problems.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xserver-xorg-input-evdev 1:2.3.2-6ubuntu1 [modified: usr/lib/xorg/modules/input/evdev_drv.so]
ProcVersionSignature: Ubuntu 2.6.35-20.29-generic 2.6.35.4
Uname: Linux 2.6.35-20-generic i686
Architecture: i386
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1024x600
 edid-base64: AP///////wAiZOkDq0MCACYTAQOAFg14CoA2ml5dkSggT1QAAAABAQEBAQEBAQEBAQEBAQEB7BMA4kBYUCBdIxUE3IEAAAAZAAAA/gAAAAAAAAAAAAAAAAAAAAAA/ABIU0QxMDBJRlcxCiAgAAAAEAAKICAgICAgICAgICAgAE4=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes: 
 edid-base64:
Date: Tue Sep 14 10:19:36 2010
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Beta i386 (20100318)
MachineType: ASUSTeK Computer INC. T101MT
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-20-generic root=UUID=064fusernamebc-ca38-478e-8dc5-3a01b5ausername259 ro quiet splash acpi_osi=Linux acpi_backlight=vendor
ProcEnviron:
 LANG=de_DE.utf8
 SHELL=/bin/bash
SourcePackage: xserver-xorg-input-evdev
dmi.bios.date: 02/03/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0404
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: T101MT
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0404:bd02/03/2010:svnASUSTeKComputerINC.:pnT101MT:pvrx.x:rvnASUSTeKComputerINC.:rnT101MT:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: T101MT
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
system:
 distro:             Ubuntu
 codename:           maverick
 architecture:       i686
 kernel:             2.6.35-20-generic

** Affects: xserver-xorg-input-evdev (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 maverick ubuntu-une

-- 
Ubuntu Patches in evdev cause regressions on touchscreen
https://bugs.launchpad.net/bugs/637874
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