two-finger scrolling doesn't work on the HP Envy 15

Same problem here. The relevant part of my Xorg.0.log is as follows:

(II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event11)
(**) SynPS/2 Synaptics TouchPad: Applying InputClass "evdev touchpad catchall"
(**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad catchall"
(II) LoadModule: "synaptics"
(II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so
(II) Module synaptics: vendor="X.Org Foundation"
        compiled for 1.7.6, module version = 1.2.2
        Module class: X.Org XInput Driver
        ABI class: X.Org XInput driver, version 7.0
(II) Synaptics touchpad driver version 1.2.2
(**) Option "Device" "/dev/input/event11"
(II) SynPS/2 Synaptics TouchPad: x-axis range 1472 - 5472
(II) SynPS/2 Synaptics TouchPad: y-axis range 1408 - 4448
(II) SynPS/2 Synaptics TouchPad: pressure range 0 - 255
(II) SynPS/2 Synaptics TouchPad: finger width range 0 - 0
(II) SynPS/2 Synaptics TouchPad: buttons: left
(--) SynPS/2 Synaptics TouchPad: touchpad found
(**) SynPS/2 Synaptics TouchPad: always reports core events
(II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: TOUCHPAD)
(**) SynPS/2 Synaptics TouchPad: (accel) keeping acceleration scheme 1
(**) SynPS/2 Synaptics TouchPad: (accel) acceleration profile 0
(**) SynPS/2 Synaptics TouchPad: (accel) acceleration factor: 2.000
(**) SynPS/2 Synaptics TouchPad: (accel) acceleration threshold: 4
(--) SynPS/2 Synaptics TouchPad: touchpad found
(II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse0)
(II) No input driver/identifier specified (ignoring)

Same here on a HP Pavilion dv6 3051sg, exactly the same touchpad. What's even more annoying than the missing multitouch is that it does not recognize a left click when a finger is still on the touchpad itself... It also likes to jump to the right when you do this (click left with a finger still on the touchpad)

Can't seem to get SHMConfig enabled, even though it's set to on in the xorg.conf... at least synclient says so when i run synclient -m 50: "Can't access shared memory area"

err - left! the mousepointer jumps to the left, not the right...