Smooth scrolling with xorg-server-1.12 and synaptics

[ShinyDoofy]

Hi there,

I've had an Apple Magic Trackpad for quite some time now and it's been working wonderfully with the hid-magicmouse kernel module and xf86-input-synaptics.

However, xorg-server-1.12 was supposed to bring smooth scrolling in conjunction with X Input 2.2. I can't seem to figure out what I really need to change in order to scroll pixel based instead of line based.

Currently, I've set the trackpad to scroll with delta 100 (VertScrollDelta), so that every 100 "pixels" I move my finger on it, it's supposed to scroll. No matter how I set this value, it always scrolls lines (i.e. I can't scroll down a single pixel in, say, firefox or dolphin). The way I read this commit for the synaptics driver, it's supposed not to trigger a button event (which is how it's been before this change), but rather call some other functions to trigger the desired pixel scroll.

mtdev-test from package sys-libs/mtdev works just fine reporting as many as up to 9 fingers, so multitouch by itself isn't the issue here.

Have any of you managed to get pixel based or "smooth" scrolling running with the new xorg-server release? Maybe the applications I tested it with just don't support smooth scrolling?

Some other info in this regard:
Vanilla Linux kernel 3.3
x11-base/xorg-server-1.12.0-r1
sys-libs/mtdev-1.1.2
x11-drivers/xf86-input-synaptics-1.5.99.902
x11-libs/libX11-1.4.99.901
x11-libs/libXi-1.6.0
ACCEPT_KEYWORDS="~amd64"

[Etal]

I remember reading that it's down to the toolkits now. Supposedly only Gtk+3 has support so far.
_________________
“And even in authoritarian countries, information networks are helping people discover new facts and making governments more accountable.”– Hillary Clinton, Jan. 21, 2010

[ShinyDoofy]

The only GTK+3 app I know of is audacious with USE="+gtk3 -gtk". Sadly, it also scrolls based on lines.

/edit: Using the same USEflags, opera also only scrolls whenever I hit the scroll delta.

[ppurka]

[ShinyDoofy]

I tried that. The only difference, it seems, really is that it smoothens the line scrolls, but it still won't scroll single pixels. Maybe my conception of what smooth scrolling is supposed to be (not scrolling by lines, but pixels rather) is off, idk.

Thanks for your hints so far, though!

[Etal]

Just found the source where I read about it: https://lwn.net/Articles/485484/

It's only in Gtk+ 3.3 (the development version)
_________________
“And even in authoritarian countries, information networks are helping people discover new facts and making governments more accountable.”– Hillary Clinton, Jan. 21, 2010

[ShinyDoofy]

So I guess all this boils down to having to wait for GTK+ and Qt to implement this. It's a shame, really, as firefox and thunderbird, for example, still use GTK+2, not 3. But oh well, at least know I now it's just not there yet.

Thank you for clearing this up, I thought I was just too dumb to get this working.