In contrast to what I wrote earlier it appears that
xserver-xorg-input-synaptics *does* need to be installed. I installed
it and now xinput list-props is listing more features such as circular
scrolling. In Plasma system settings touchpad features that were
previously not available are now av
Additional info for the kernel I compiled with Synaptics RMI4 bus
support -> RMI4 SMB Support enabled:
dmesg |grep -i smbus
[ 1.401103] i801_smbus :00:1f.3: SPD Write Disable is set
[ 1.401130] i801_smbus :00:1f.3: SMBus using PCI interrupt
[ 2.213572] psmouse serio1: synaptics:
I have a Thinkpad T550 and initially had a similar issue:
With the stock kernel in Sid:
dmesg |grep psmouse
psmouse serio1: synaptics: The touchpad can support a better bus than
the too old PS/2 protocol. Make sure MOUSE_PS2_SYNAPTICS_SMBUS and
RMI4_SMB are enabled to get a better touchpad ex
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