Denis, can you point me to the scripts that you mentioned, the ones that
disable touch when pen is in proximity? Multitouch really gets in the way
of inking in Unity.
On Fri, Dec 12, 2014 at 11:40 PM, Denis Auroux <aur...@math.berkeley.edu>
wrote:
>
> On 12/13/2014 02:04 AM, Leo Alekseyev wrote:
>
>> I recently got around to installing Ubuntu on the original Microsoft
>> Surface Pro. It's a nice piece of hardware, with the proviso that the
>> kernel wifi drivers are flaky and it's easiest to use an external USB
>> dongle. Touch functionality, however, makes Xournal hard to use for 2
>> reasons: (1) Xournal responds to touch input by putting dots on canvas.
>> Worse, Xournal is trying to connect the touch point from my palm to the
>> input from the stylus, resulting in weird spurious lines.
>>
>
> Can you give the output of "xinput list" ?
>
> Assuming you're using xournal 0.4.8 (or the current git, not very
> different) (if not, you should -- 0.4.8 has many important touchscreen
> fixes in it), did you specify the touchscreen device under Options -> Pen
> and Touch -> Designate as Touchscreen, and try turning on options like
> "Touchscreen as hand tool" and "Pen disables touch" ?
>
> There might still be some bugs, but at least the sort of behavior
> shouldn't happen if there are distinct devices for the pen and the
> touchscreen and the touchscreen device is
>
> If there aren't different xinput devices for pen vs. touch, then you're
> essentially out of luck as far as using the pen properly in Linux goes.
>
> (2) Resting
>> palm on the screen triggers Unity 3- or 4-finger multi-touch gestures,
>> which either open the Unity HUD menu, or bring up drag handles on the
>> window. That's also pretty annoying and interferes with trying to ink.
>>
>
> I don't know anything about Unity, but short of disabling the multi-touch
> gestures altogether in the Unity settings I don't think you can expect
> anything better. If all else fails, it's a big hammer but you can always
> run
>
> xinput disable "name of touchscreen device"
>
> before running xournal. Some people wrote scripts that automatically run
> this (or conversely enable) every second depending on whether the wacom pen
> is in proximity or not, but I'm not a big fan (but then I don't have that
> annoying Unity problem since I use gnome).
>
> Has anyone looked into what it might take to make Xournal ignore touch
>> input
>>
>
> If xinput reports a separate input device for the pen, get 0.4.8 and set
> up the options under Pen and Touch as works best for you.
> If you don't have a separate input device for the pen, you're out of luck,
> xournal has no way of telling your pen from your hand.
>
> Hope this helps,
> Denis
>
> --
> Denis Auroux
> UC Berkeley, Department of Mathematics aur...@math.berkeley.edu
> Institut Henri Poincare, Paris aur...@ihp.fr
>
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