The problem: On some lenovo laptops (this problem has been reproduced on 3 lenovo laptop models), we let the machine boot into the desktop and login to the desktop, the touchpad workes very well. But After we close the lid then after a while open the lid, the touchpad won't work anymore. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1089105 The root cause: Through investigation, i found on some lenovo laptop models, when we close the lid, the i8042/keyboard will generate a touchpad toggle key event (generating a keycode same as the one generated by pressing touchpad toggle functionkey/hotkey), while opening the lid, the i8042/keyboard also generate a touchpad toggle key event. If users close the lid under the gnome environment, the touchpad toggle key event will be captured by the gnome-settings-daemon, so the touchpad is disabled by the daemon, when users open the lid, the system will go to the login window (gnome-screensaver), so the touchpad toggle key event generated by opening lid doesn't pass to gnome-settings-daemon, so the touchpad doesn't restore to the original status. The keyboard driver is: drivers/input/keyboard/atkbd.c How to identify a machine whether has this problem or not: An easy way to identify whether the machine has this problem is: booting to gnome environment, pressing ALT+CTRL+F1 to enter text console, executing showkey, closing lid, waiting several seconds, opening the lid, if following logs are produced, your machine will have this problem. keycode 191 press keycode 191 release keycode 191 press keycode 191 release My question: Most of lenovo laptop models don't generate touchpad toggle event when closing or opening the lid, so far this problem only happens on 3 laptop models. I don't know who let the i8042/keyboard generate a touchpad toggle key event when closing or opening the lid on those machines, do we have a software/firmware method to let the i8042/keyboard don't generate this event when closing or opening the lid? Thanks, Hui. -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
