Comment 18 for bug 896922

I will add the necessary information in the following days piece by piece.

Today, I had this issue at first Ubuntu 12.04 x64 - 3.2.0-30-generic, after a clean boot:

dmesg | grep psmouse
[ 27.462037] psmouse serio4: synaptics: Touchpad model: 1, fw: 7.2, id: 0x1c0b1, caps: 0xd047b3/0xb40000/0xa0000
[ 27.462053] psmouse serio4: synaptics: serio: Synaptics pass-through port at isa0060/serio4/input0
[ 5842.313613] psmouse serio4: TouchPad at isa0060/serio4/input0 lost synchronization, throwing 5 bytes away.
[ 5842.336390] psmouse serio4: resync failed, issuing reconnect request

dmesg | grep thinkpad
[ 28.377479] thinkpad_acpi: ThinkPad ACPI Extras v0.24
[ 28.377483] thinkpad_acpi: http://ibm-acpi.sf.net/
[ 28.377486] thinkpad_acpi: ThinkPad BIOS 8GET42WW (1.19 ), EC 8GHT28WW-1.10
[ 28.377489] thinkpad_acpi: Lenovo ThinkPad L520, model 785954G
[ 28.378418] thinkpad_acpi: detected a 8-level brightness capable ThinkPad
[ 28.378781] thinkpad_acpi: radio switch found; radios are enabled
[ 28.378793] thinkpad_acpi: possible tablet mode switch found; ThinkPad in laptop mode
[ 28.379875] thinkpad_acpi: asked for hotkey mask 0x078dffff, but firmware forced it to 0x008dffff
[ 28.386885] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is blocked
[ 28.402710] thinkpad_acpi: Standard ACPI backlight interface available, not loading native one
[ 28.403041] thinkpad_acpi: Console audio control enabled, mode: monitor (read only)
[ 28.409029] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input10

As next, I will try the Mainline Kernel.