Arch Linux

I have a Lenovo T440p with a synaptics touchpad. I kind of have the same problem, here the synaptics driver runs the touchpad in serio emulation mode, which sometimes becomes unresponsive. The solution I divised in the past was to load psmouse (with paramter synaptics_intertouch=1) after rmi_smbus to force the touchpad to run in the vastly better smbus mode. The problem with a builtin psmouse is that this is not an option (maybe psmouse can be reinitialize the hardware from sysfs?).

Please revert the psmouse option to a module again. I looked at the github logs of the PKGBUILD and it seems that the change was only pushed with some other fedora kernel standard options.

@mxr Have you tried setting psmouse.synaptics_intertouch=1 on kernel command line [1]?

[1] https://wiki.archlinux.org/index.php/Kernel_module#Using_kernel_command_line

Adding psmouse.synaptics_intertouch=1 behaves exactly the same as loading psmouse before rmi_smbus:

(excerpt from kernel log)
psmouse serio1: synaptics: Trying to set up SMBus access
psmouse serio1: synaptics: SMbus companion is not ready yet
psmouse serio1: synaptics: quirked min/max coordinates: x [1024..5112], y [2024..4832]
psmouse serio1: synaptics: Touchpad model: 1, fw: 8.1, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x127c00/0x0, board id: 2939, fw id: 1586425
psmouse serio1: synaptics: serio: Synaptics pass-through port at isa0060/serio1/input0

In the past I simply unloaded psmouse at the end of the boot processe and reinserted the module again, that seemed to work.
setting "softdep psmouse pre: rmi_smbus" in /etc/modprobe.d/ did nothing apearently smbus needs some time to settle before psmouse can access it. ideally psmouse would detect smbus at a later time and switches to it.

Similar here. Would be nice to regain full control of psmouse, considering it doesn't always just work with touchpads, trackpads and such. My touchpad requires a limited protocol in the console to keep it from acting up, whereas in Xorg with libinput I can get more out of it. Without runtime changes via modprobe, I'm limited to one or the other. Overall seems like the input modules with useful config parameters make good LKMs (psmouse, i8042), while others (libps2, serio) are for building in.

Similar here. Would be nice to regain full control of psmouse, considering it doesn't always just work with touchpads, trackpads and such. My touchpad requires a limited protocol in the console to keep it from acting up, whereas in Xorg with libinput I can get more out of it. Without runtime changes via modprobe, I'm limited to one or the other. Overall seems like the input modules with useful config parameters make good LKMs (psmouse, i8042), while others (libps2, serio) are for building in.

And https://aur.archlinux.org/packages/synaptics-led/ package doesn't work now.

"psmouse" module was build-in in kernel 5.10.2

I'm also affected by this change. I have a Thinkpad P53 and the touchpad/trackpoint stops working after waking up from suspend, the only workaround was reloading the psmouse module, which does not work anymore after this change. There are many people affected by this bug, see e.g. here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788928

I'm likewise affected by this problem. Thinkpad T440s.

Same here on Thinkpad T431s. Touchpad scrolling didn't work sometimes after waking up from suspend and I used to reload psmouse module to fix that.

T440 for me. I added linux package to pacman IgnorePkg while waiting that psmouse become a module again.

ditto, Entroware Apollo (intermittently).

Thinkpad X240 user with same issue here

The trackpad issue was easily solved by removing and readding the psmouse module. With it being built in it becomes a major annoyance.