BCM5974 touchpad issues...

[Peter Hutterer]

On Tue, Mar 05, 2013 at 03:30:57PM +0800, Daniel J Blueman wrote:
> On 14 February 2013 06:07, Peter Hutterer <peter.hutterer at who-t.net> wrote:
> > On Wed, Feb 13, 2013 at 10:47:50PM +0800, Daniel J Blueman wrote:
> >> On 12 February 2013 20:00, Timo Aaltonen <tjaalton at ubuntu.com> wrote:
> >> > On 12.02.2013 09:32, Daniel J Blueman wrote:
> >> >> On 12 February 2013 12:47, Peter Hutterer <peter.hutterer at who-t.net>
> >> >> wrote:
> >> >>> On Mon, Feb 11, 2013 at 03:10:41PM +0800, Daniel J Blueman wrote:
> >> >>>>
> >> >>>> I'm seeing erratic click events on Broadcom 5974 touchpads (Macbook
> >> >>>> Pro 10,1) during two-finger scrolling.
> 
> >> Peter: would you expect these 'BTN_TOOL_DOUBLETAP value 1' events when
> >> two-finger scrolling [2]?
> >
> > BTN_TOOL_DOUBLETAP is the boolean for "two-fingers on the touchpad", so yes.
> 
> I'm still seeing this after moving to Ubuntu 13.04 prerelease. Since
> the issue reproduces 1/20 times I scroll eg in gedit, it's hard to
> switch terminal, launch evtest and be sure it'll be logged.
> 
> I checked the source of evtest to see if I could change opening the
> eventfd to allow multiple clients sharing it, but it's clearly not how
> things work.
> 
> Any ideas how I can log the scrollpad activity while using X?


$> cat /etc/X11/xorg.conf.d/99-synaptics-dontgrab.conf
Section "InputClass"
	Identifier "Don't grab synaptics"
	MatchDriver "synaptics"
	Option "GrabEventDevice" "off"
EndSection

then restart X and you can log while X is running.

Cheers,
   Peter

> One fallback is that I modify evtest with an option to visualise the
> scrolling (as I see in gedit) to be able to detect undue clicks or
> jumps. What do you think?
> 
> Thanks,
>   Daniel
> -- 
> Daniel J Blueman