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Groups > linux.debian.bugs.dist > #850244

Bug#875621: linux: ThinkPad X270 Synaptics touchpad: please enable CONFIG_RMI4_SMB

Cross-posted to 2 groups.

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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 [..4780]
Sep  8 14:18:15 muta kernel: [    4.121930] psmouse serio1: synaptics:
queried min coordinates: x [1232..], y [1074..]
Sep  8 14:18:15 muta kernel: [    4.121939] 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 experience.
Sep  8 14:18:15 muta kernel: [    4.184718] psmouse serio1: synaptics:
Touchpad model: 1, fw: 8.2, id: 0x1e2b1, caps:
0xf407a3/0x943300/0x12e800/0x410000, board id: 3075, fw id: 2477413
Sep  8 14:18:15 muta kernel: [    4.184735] psmouse serio1: synaptics:
serio: Synaptics pass-through port at isa0060/serio1/input0

Please consider enabling CONFIG_RMI4_SMB.
CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS is already enabled:

bootc@muta ~ $ egrep 'MOUSE_PS2_SYNAPTICS_SMBUS|RMI4_SMB'
/boot/config-4.12.0-1-amd64
CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS=y
# CONFIG_RMI4_SMB is not set

Thanks,
Chris

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.12.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

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Bug#875621: linux: ThinkPad X270 Synaptics touchpad: please enable CONFIG_RMI4_SMB Chris Boot <bootc@debian.org> - 2017-09-12 20:40 +0200
  Bug#875621: linux: ThinkPad X270 Synaptics touchpad: please enable CONFIG_RMI4_SMB Josh Triplett <josh@joshtriplett.org> - 2017-10-28 08:00 +0200

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