Package: src Version: 6.12.96-1 Severity: normal Dear Debian Kernel Team,
I would like to report an intermittent touchpad issue on two identical Lenovo ThinkPad T14 Gen 1 AMD systems running Debian Trixie. Hardware: Lenovo ThinkPad T14 Gen 1 AMD Two identical systems are affected BIOS firmware is up to date (June 2026) Touchpad: Synaptics LEN2064 PNP0f13 Firmware: 10.32 Model: 1 ID: 0x1e2a1 Board ID: 3471 FW ID: 3972349 Kernel: Debian Trixie Linux 6.12.96+deb13-amd64 6.12.94-1 was also tested and shows the same issue Problem description: The touchpad intermittently shows no pointer movement after boot. The physical touchpad click button continues to work. The red dot TrackPoint continues to work normally. An external Bluetooth mouse continues to work. The issue is not present after every boot: Sometimes the touchpad works normally. Sometimes the system starts directly with the broken state. A reboot sometimes restores operation, but not reliably. When the problem occurs, the touchpad is still registered by the kernel: SynPS/2 Synaptics TouchPad from /proc/bus/input/devices: I: Bus=0011 Vendor=0002 Product=0007 Version=01a1 N: Name="SynPS/2 Synaptics TouchPad" P: Phys=isa0060/serio1/input0 H: Handlers=mouse0 event6 The TrackPoint remains functional: psmouse serio2: trackpoint: Elan TrackPoint firmware: 0x12, buttons: 3/3 Relevant kernel messages during initialization: psmouse serio1: synaptics: queried max coordinates: x [..5678], y [..4694] psmouse serio1: synaptics: queried min coordinates: x [1266..], y [1162..] psmouse serio1: synaptics: Touchpad model: 1, fw: 10.32, id: 0x1e2a1, caps: 0xf014a3/0x940300/0x12e800/0x500000 psmouse serio1: synaptics: Your touchpad (PNP: LEN2064 PNP0f13) says it can support a different bus. If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 Testing psmouse.synaptics_intertouch=1 results in: psmouse serio1: synaptics: Trying to set up SMBus access psmouse serio1: synaptics: SMbus companion is not ready yet The following kernel parameters were tested without improvement: psmouse.synaptics_intertouch=1 psmouse.synaptics_intertouch=0 i8042.reset=1 psmouse.synaptics_intertouch=0 i8042.reset=1 i8042.nomux=1 i8042.reset=1 Reloading the psmouse module also does not restore operation: modprobe -r psmouse modprobe psmouse The issue appears to be below the desktop/input stack level: The problem occurs with Wayland. The device remains present in the kernel input subsystem. The failure affects touchpad movement only; buttons and TrackPoint continue to work. A related report exists in another distribution: https://bugs.launchpad.net/bugs/2151260 That report describes a very similar issue with: Lenovo ThinkPad P14s Gen 1 AMD Synaptics LEN2064 firmware 10.32 touchpad buttons working while touchpad motion stops The issue reproduces on two identical systems with the same touchpad firmware and board ID, making a single-device hardware fault unlikely. Please let me know if additional debugging information is required. Best regards
