Arch Linux

jlreid

Member

Registered: 2011-06-14

Posts: 3

Elantech Touchpad Issue/Confusion on Fresh Install

This machine is an Acer Aspire 5253-BZ660.  I use this machine exclusively for running Mixxx (the linux dj application) which I use professionally.

On my first go at trying Arch, everything worked well. I was more than pleased.  However I experimented with tweaking various component latencies to improve system performance, and I also tried switching from the open source ati drivers to catalyst.  Big mistake because I lost my xserver, and after banging my head for a couple days I decided to do a re-install.

Now I'm pretty much back up--running the open source ati drivers--but for some reason my touchpad is completely unresponsive.

Here is my current Xorg.log:

[    24.238] (II) config/udev: Adding input device ETPS/2 Elantech Touchpad (/dev/input/event8)
[    24.239] (**) ETPS/2 Elantech Touchpad: Applying InputClass "touchpad catchall"
[    24.239] (II) LoadModule: "synaptics"
[    24.239] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so
[    24.241] (II) Module synaptics: vendor="X.Org Foundation"
[    24.241]     compiled for 1.10.2, module version = 1.4.0
[    24.241]     Module class: X.Org XInput Driver
[    24.241]     ABI class: X.Org XInput driver, version 12.2
[    24.241] (II) Using input driver 'synaptics' for 'ETPS/2 Elantech Touchpad'
[    24.241] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so
[    24.241] (**) ETPS/2 Elantech Touchpad: always reports core events
[    24.241] (**) Option "Device" "/dev/input/event8"
[    24.370] (--) ETPS/2 Elantech Touchpad: x-axis range 8 - 1144
[    24.370] (--) ETPS/2 Elantech Touchpad: y-axis range 8 - 760
[    24.370] (II) ETPS/2 Elantech Touchpad: device does not report pressure, will use touch data.
[    24.370] (--) ETPS/2 Elantech Touchpad: buttons: left right double triple
[    24.370] (--) ETPS/2 Elantech Touchpad: invalid pressure range.  defaulting to 0 - 256
[    24.370] (--) ETPS/2 Elantech Touchpad: invalid finger width range.  defaulting to 0 - 16
[    24.370] (**) Option "TapButton1" "1"
[    24.370] (**) Option "TapButton2" "2"
[    24.370] (**) Option "TapButton3" "3"
[    24.476] (--) ETPS/2 Elantech Touchpad: touchpad found
[    24.477] (**) ETPS/2 Elantech Touchpad: always reports core events
[    24.530] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input8/event8"
[    24.530] (II) XINPUT: Adding extended input device "ETPS/2 Elantech Touchpad" (type: TOUCHPAD)
[    24.530] (**) ETPS/2 Elantech Touchpad: (accel) MinSpeed is now constant deceleration 2.5
[    24.530] (**) ETPS/2 Elantech Touchpad: MaxSpeed is now 1.75
[    24.530] (**) ETPS/2 Elantech Touchpad: AccelFactor is now 0.147
[    24.531] (**) ETPS/2 Elantech Touchpad: (accel) keeping acceleration scheme 1
[    24.531] (**) ETPS/2 Elantech Touchpad: (accel) acceleration profile 1
[    24.531] (**) ETPS/2 Elantech Touchpad: (accel) acceleration factor: 2.000
[    24.531] (**) ETPS/2 Elantech Touchpad: (accel) acceleration threshold: 4
[    24.610] (--) ETPS/2 Elantech Touchpad: touchpad found
[    24.611] (II) config/udev: Adding input device ETPS/2 Elantech Touchpad (/dev/input/mouse0)
[    24.611] (II) No input driver/identifier specified (ignoring)
[    24.611] (II) config/udev: Adding input device PC Speaker (/dev/input/event5)
[    24.611] (II) No input driver/identifier specified (ignoring)
[    34.928] (II) RADEON(0): EDID vendor "LGD", prod id 592
[    34.928] (II) RADEON(0): Printing DDC gathered Modelines:
[    34.928] (II) RADEON(0): Modeline "1366x768"x0.0   72.30  1366 1414 1446 1526  768 771 776 790 -hsync -vsync (47.4 kHz)
[   330.377] ETPS/2 Elantech Touchpad: Read error No such device
[   330.378] (II) config/udev: removing device ETPS/2 Elantech Touchpad
[   330.405] (II) UnloadModule: "synaptics"
[   330.405] (II) Unloading synaptics

My problem is staring me right in the face.  I can see that udev detects my trackpad, loads synaptics, and reports that everything's cool... but then for some reason it adds teh touchpad again, but this time assigns it to /dev/input/mouse0.  It then tries to access the device there, can't find it, and then unloads synaptics...

I've done some searching both here and elsewhere, but haven't found a solution.  I've tried both commenting out and deleting the touchpad part of my evdev configuration file.  I've even hidden the 10-synaptics* file, which someone found actually stopped udev from doing this.

I am running udev 1.7, and haven't yet downgraded, but I seemed to recall seeing an announcement that this was an issue with the init scripts and that the bug was corrected...

One last thing, my install disc is dated 5-23-11 so it has the core packages that were current at that date.  I've only used this disc, but do tend to choose the net packages as my source, so I'm sure this problem stems from something that was updated after 5-23.

Hope someone can help me fix this...

-JLR

p.s.  An idea just hit me as a possible workaround.  I'm going to check if /dev/input/mouse0 exists, and if it doesn't I guess I could just sim link it to /dev/input/event* and then udev should hopefully access the touchpad despite which path it uses... if that works, cool, but I'd like to get the system running as it's intended.  Thanks again.

sunaku

Member

From: /dev/tty

Registered: 2010-09-29

Posts: 140

Website

Re: Elantech Touchpad Issue/Confusion on Fresh Install

I'm having the same issue since two nights ago, when I rebooted my laptop.  There were some brief errors on one of the DAEMONS, but the init procedure switched to the login screen before I had a chance to read the errors. 

sunaku

Member

From: /dev/tty

Registered: 2010-09-29

Posts: 140

Website

Re: Elantech Touchpad Issue/Confusion on Fresh Install

SOLVED the problem by downgrading the kernel26 package to version 2.6.39.1-1.  The problem occurred with the next newer kernel26 release (version 2.6.39.2-1).

sunaku

Member

From: /dev/tty

Registered: 2010-09-29

Posts: 140

Website

Re: Elantech Touchpad Issue/Confusion on Fresh Install

I posted this problem as a bug report here:  https://bugs.archlinux.org/task/25057

sunaku

Member

From: /dev/tty

Registered: 2010-09-29

Posts: 140

Website

Re: Elantech Touchpad Issue/Confusion on Fresh Install

I upgraded my kernel26 to version 2.6.39.3-1 and the problem is solved.