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
Package: src:linux
Version: 4.13.4-2
Followup-For: Bug #875621
Same issue here with the X1 Carbon 5th generation.
-- Package-specific info:
** Version:
Linux version 4.13.0-1-amd64 (debian-kernel@lists.debian.org) (gcc version
6.4.0 20171010 (Debian 6.4.0-8)) #1 SMP Debian 4.13.4-2 (2017-10-15)
Source: linux
Version: 4.12.6-1
Severity: wishlist
Dear Maintainer,
During boot, the 4.12 kernel suggests some additional kernel options
should be enabled to improve touchpad support:
Sep 8 14:18:15 muta kernel: [4.089833] psmouse serio1: synaptics:
queried max coordinates: x [..5712], y [.
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