ubuntu-x-swat team mailing list archive

[Seth Forshee <seth.forshee@xxxxxxxxxxxxx>]

On Tue, Oct 04, 2011 at 05:11:13AM -0000, pauljohn32 wrote:
> Greetings.
> 
> do you get accidental "grabs" as you try to move the cursor?  I never
> noticed this in the psmouse dkms patch version 0.2, but in 0.9, it
> happens often. Moving the cursor toward top with a few finger brushes
> does not always select a region, but sometimes it does.
> 
> Is that likely related to this weird thing that happens sometimes. I
> remove hands from typing, lifting them off the laptop entirely. WHen I
> start typing again, the cursor is in an entirely different spot. It is
> as if the protection from palm brushes had failed, but in a worse than
> usual way.

I haven't seen accidental grabs. The cursor jumping is probably a result
of the multitouch support. If your palm is detected as multiple touches,
which wouldn't be surprising based on my observations, then it could be
that the absolute position reported by the touchpad jumps as your palm
looses contact. You can probably produce the same behavior by placing
two fingers on the touchpad and then lifting one of them (it won't
happen every time, but if you do it repeatedly you should see the cursor
jump).

If you can consistently reproduce the accidently grabs, it would be
useful if you could capture some data in a virtual terminal. First
run 'sudo dmesg -c > /dev/null' to clear out the kernel log, then run

  echo 1 | sudo tee /sys/module/psmouse/parameters/alps_dump_packets

Next start capturing the touchpad events to a file using input-events
(I've described this several times already on this bug, so I won't
repeat it again here). Do the actions that trigger the grabs, press
Ctrl-C to stop input-events, then run 'dmesg > dmesg-grabs.txt'. Attach
the input-events log and dmesg-grabs.txt here so I can take a look.

Thanks!

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-input-synaptics in Ubuntu.
https://bugs.launchpad.net/bugs/550625

Title:
  Alps touchpad is recognized but synaptics clients and scrolling do not
  work

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/550625/+subscriptions