Public bug reported:
Binary package hint: xserver-xorg-input-synaptics
Short description: Rebooting the system while the touchpad is toggled
off, could lead to a non functional touchpad after reboot. It could not
be switched on again.
I am not sure about the package i selected for this bug report.
Long description:
I will describe several scenarios to describe the problem. First of all,
there is no problem with the touchpad itself.
After log in as User A, the touchpad works as expected. Also toggling
on/off works with Fn+F7 (This combination is also bound to
XF86TouchpadToggle, keycode 200).
Now i disable the touchpad with Fn-F7. The system notifies my about that
by showing a touchpad icon with a little red cross. Everything is fine
so far. Now i restart the system.
After restart, gdm waits for a User selection. At this point, the
touchpad is not working. From this point i will descibe two different
ways of proceeding:
1. Now - still in gdm - i enable the touchpad (Fn-F7), select a User A,
password, Gnome starts. The Touchpad now doesn't work, but i can enable
it by Fn-F7 (visual feedback now also signals "enabled"). In my opinion,
the touchpad state has been saved for the gnome session just before i
restarted the system and has been restored.
2. This time i don't enable touchpad, login as User A, Gnome starts. The
Touchpad now doesn't work either, but now i can't enable it by Fn-F7.
The visual feedback again signals, that it should be enabled, but it is
not. Repeated Fn-F7 keystrokes toggle the visual signal, but not the
touchpad.
I am now able to fix the situation by executing the following commands:
xsendkeycode 200 1; xsendkeycode 200 0
After this, the state of the touchpad and the state of the visual signal
is "synchronized". Now Fn-F7 works as expected again.
It seems that there exist two systems for touchpad control on my
computer. The system provided by Ubuntu and another one maybe integrated
in the hardware. As long as both systems are in sync, both do the same:
Either enable or disable the touchpad. But as soon as they work counter
wise, the result is always a disabled touchpad.
With the commands above i am also able to "desynchronize".
Is it possible to switch off the "Ubuntu system" for touchpad toggling?
This could help to prove, that there is a second system. It would also
be a workaround/solution for my computer (i do not need a visual
feedback).
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xserver-xorg-input-synaptics 1.2.2-1ubuntu4 [modified:
usr/lib/X11/xorg.conf.d/10-synaptics.conf]
ProcVersionSignature: Ubuntu 2.6.32-23.37-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-23-generic x86_64
Architecture: amd64
CheckboxSubmission: 06f8f0bfd32794bbacd433bf1b762a08
CheckboxSystem: 2954e74ba17fb0e37fc942cd1d9fab4e
Date: Fri Jul 16 10:44:41 2010
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: Acer Extensa 5635Z
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-23-generic
root=UUID=848b11ad-beea-4058-9e5a-80616d24841c ro
crashkernel=384M-2G:128M,2G-:128M quiet splash acpi_osi=Linux
acpi_backlight=legacy
ProcEnviron:
PATH=(custom, user)
LANG=de_DE.utf8
SHELL=/bin/bash
SourcePackage: xserver-xorg-input-synaptics
dmi.bios.date: 12/21/2009
dmi.bios.vendor: Phoenix
dmi.bios.version: V1.3311
dmi.board.name: BA50-MV
dmi.board.vendor: Acer
dmi.board.version: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenix:bvrV1.3311:bd12/21/2009:svnAcer:pnExtensa5635Z:pvrNotApplicable:rvnAcer:rnBA50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
dmi.product.name: Extensa 5635Z
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer
system:
distro: Ubuntu
codename: lucid
architecture: x86_64
kernel: 2.6.32-23-generic
** Affects: xserver-xorg-input-synaptics (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug lucid
--
toggling touchpad not possible after reboot if touchpad is switched off at this
time
https://bugs.launchpad.net/bugs/606190
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