BCM5974 touchpad issues...

[Daniel J Blueman]

On 6 March 2013 07:48, Peter Hutterer <peter.hutterer at who-t.net> wrote:
> On Tue, Mar 05, 2013 at 03:30:57PM +0800, Daniel J Blueman wrote:
>> I'm seeing [erratic click events and jumpy scrolling on Broadcom 5974
>> touchpads (Macbook Pro 10,1) during two-finger scrolling] on Ubuntu
>> 13.04 prerelease. Since the issue reproduces [1/10] 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?
[...]

Superb, thanks Peter.

I've captured a session exhibiting the behaviour; for comparison a
normal two-finger scroll is between:

Event: time 1362909816.949923, type 1 (EV_KEY), code 333
(BTN_TOOL_DOUBLETAP), value 1
and:
Event: time 1362909817.959870, type 1 (EV_KEY), code 333
(BTN_TOOL_DOUBLETAP), value 0

Around here, I see a false click:
Event: time 1362909818.577892, type 1 (EV_KEY), code 333
(BTN_TOOL_DOUBLETAP), value 1
and scrolling here jumps forward ~5 lines every 5 lines (this is
surely not a feature?)
Event: time 1362909820.148825, type 1 (EV_KEY), code 333
(BTN_TOOL_DOUBLETAP), value 0

I've uploaded the log to http://quora.org/evtest-bcm5974.log if you're
able to find anything interesting. Let me know if I can get any
other/better debug.

Many thanks!
  Daniel
-- 
Daniel J Blueman