Created attachment 32674 [details]
I reported the same bug to the xserver-xorg-input-synaptics Debian package. Since it does not receive any attention there I thought I'd report upstream.
I recently upgraded to xorg 7.4 so I could use the Nvidia driver nouveau.
On Debian xorg 7.4 required synaptics driver version 1.2.0 or later. I can reproduce the problem with the latest git version of synaptics. The bug does not happen with xorg 7.3 + synaptics 0.14.7~git20070706-3 (Debian package).
The following symptoms lead me to believe it is a problem with the synaptics driver.
* Steps to reproduce
1. open two X terminals
2. select some text in one terminal
3. left-click the other terminal using the touchpad
4. repeat above steps several times
* Expected result
Step 3 switches window focus.
* Actual result
Step 3 switches window focus and sometimes pastes the selected text from the other terminal.
It usually takes 10-20 repetitions of the above process for this to happen.
If it does not happen, doing something else like switching windows usually
helps trigger the problem again.
I was able to reproduce this with xev (log attached). Sometimes both button
events are generated, sometimes only button 2.
I can _not_ reproduce the problem with a USB mouse.
The problem is especially annoying in firefox, where button 2 causes tabs to
be closed and the pasted text is interpreted as URLs to be opened. It's also
annoying when the clipboard contents get pasted on IRC.
-- System Information:
Debian Release: 5.0.3
APT prefers stable
APT policy: (990, 'stable'), (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.33-rc1-00366-g2f99f5c (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages xserver-xorg-input-synaptics depends on:
ii libc6 2.10.2-2 GNU C Library: Shared libraries
ii libpciaccess0 0.10.3-1 Generic PCI access library for X
ii libpixman-1-0 0.16.2-1 pixel-manipulation library for X a
ii libx11-6 2:1.3.2-1 X11 client-side library
ii libxi6 2:1.2.1-2 X11 Input extension library
ii xserver-xorg-core 2:1.6.5-1 Xorg X server - core server
xserver-xorg-input-synaptics recommends no packages.
Versions of packages xserver-xorg-input-synaptics suggests:
pn gpointing-device-settings <none> (no description available)
pn touchfreeze <none> (no description available)
Created attachment 32675 [details]
Created attachment 32676 [details]
Created attachment 32677 [details]
Created attachment 32678 [details]
drm information from dmesg
The Debian bug is #563045.
I'm using Ubuntu 9.10 on a Dell Vostro 1500, and this bug started to occur when I upgraded to kernel 2.6.33 (available at http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.33/)
Clicking on the left button of my touchpad may randomly result as a right click or a middle click.
My synaptics package is 1.1.2-1ubuntu7 (same as Debian Sid + a few Ubuntu patches), Xorg is 7.4.
On Sat, Feb 27, 2010 at 11:51:02AM -0800, email@example.com wrote:
> My synaptics package is 1.1.2-1ubuntu7 (same as Debian Sid + a few Ubuntu
> patches), Xorg is 7.4.
I have recently upgraded to Xorg 7.5 and the latest nouveau linux kernel
(ea0a1d5), since current nouveau drm does not work with vanilla kernels. The
problem has since gone away. [*]
Other related (Debian) package versions are as follows. So the current
synaptics driver in Debian sid seems to be slightly more recent than yours.
ii xserver-xorg 1:7.5+3
ii xserver-xorg-core 2:1.7.4-2
ii xserver-xorg-input-evdev 1:2.3.2-3
ii xserver-xorg-input-kbd 1:1.4.0-1
ii xserver-xorg-input-mouse 1:1.5.0-1
ii xserver-xorg-input-synaptics 1.2.1-1
ii xserver-xorg-video-fbdev 1:0.4.1-1
ii xserver-xorg-video-v4l 1:0.2.0-4
[*] I can not be absolutely certain that this upgrade fixed the problem,
since there have had other upgrades before that and I had the
middle mouse button deactivated (xmodmap -e 'pointer = 1 0 3') until this
(In reply to comment #7)
> On Sat, Feb 27, 2010 at 11:51:02AM -0800, firstname.lastname@example.org wrote:
> I have recently upgraded to Xorg 7.5 and the latest nouveau linux kernel
> (ea0a1d5), since current nouveau drm does not work with vanilla kernels. The
> problem has since gone away. [*]
Turns out that latest nouveau at that time was still based on 2.6.32. I recently upgraded to latest nouveau again (2.6.34-rc2-00742-ga2b2091), and the bug reappeared. Obviously nouveau is now based on 2.6.34-rc2. I'm going to try and bisect -- which might take a while...
Ok, I managed to bisect the bug to commit 315eb996 (Input: psmouse - rework setting of BTN_MIDDLE capability) with a vanilla kernel. Reverting the commit in 2.6.34-rc2 also seems to fix the problem. I will report this to lkml after some more testing.
Kernel bug report: https://bugzilla.kernel.org/show_bug.cgi?id=15755
The reason for the button 2 events was the multifinger click feature. It was disabled previously to kernel version 2.6.33, because the kernel used to report a 3-button device. Either way, it can be disabled by setting the configuration option ClickFinger3 to 1, i.e.,
Identifier "Synaptics Touchpad"
Option "SendCoreEvents" "true"
Option "Device" "/dev/input/mice"
Option "Protocol" "auto-dev"
Option "ClickFinger3" "1"
Since this triggers way too easily by accident, I would like to ask that this feature be disabled by default. That way, behavior also doesn't change on a kernel upgrade.
good point, I agree here.
since this is a defaults change, I'd like to have this archived on the list, see the thread here:
Note that at least with the last configuration applied here, this may not be everything you need, as the required fields has_left and has_middle are not set for backends other than the eventcom backend. for the hotplugging case however, this should work
Pushed, thanks for tracking this bug down.
Author: Peter Hutterer <email@example.com>
Date: Thu Apr 29 15:03:55 2010 +1000
Disable ClickFinger for touchpads with more than one physical button (#26079)
On Mon, May 03, 2010 at 09:45:54PM -0700, firstname.lastname@example.org wrote:
> Pushed, thanks for tracking this bug down.