Installed Tumbleweed on a brand new Acer Aspire R11 (R3-131T-C56L). Turned out
the Touchpad does not work. It is even not listed in /proc/bus/input/devices.
The Raydium touchscreen however works correctly.

I first tried Leap 42.1 on this machine but had to convert to Tumbleweed since
ACPI and the VGA adapter where not correctly supported. BUT the touchpad was
detected correctly and worked without problem.
On Tumbleweed ACPI and VGA work correctly but no touchpad is detected.

When I boot in the Leap Recovery system /proc/bus/input/devices contains this
about the touchpad:
I: Bus=0011 Vendor=0002 Product=000e Version=0000
N: Name="ETPS/2 Elantech Touchpad"
P: Phys=isa0060/serio1/input0
S: Sysfs=/devices/platform/i8042/serio1/input/input4
U: Uniq=
H: Handlers=mouse0 event1
B: PROP=5
B: EV=b
B: KEY=e420 10000 0 0 0 0
B: ABS=661800011000003

In Tumbleweed it just is not listed.