I add some debug message in unity-settings-daemon/plugins/mouse module, and run tests. Here are my founds:
1-a) Press Fn+F9, function touchpad_callback disables the touchpad. 1-b) However after touchpad is disabled, device_removed_cb is invoked, and it then calls ensure_touchpad_active. 1-c) The ensure_touchpad_active checks if toucpad is the only one pointer device on the platform, it will make touchpad always enabled. 1-d) However ensure_touchpad_active only changes the gsettings entries but leave the device disabled. * Press Fn+F9 to disable touchpad =============================== 1st TOUCHPAD HOTKEY TRIGGER START =============================== (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG touchpad_callback ENTER === (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: +++(1) gsettings KEY_TOUCHPAD_ENABLED value: 0 (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: Trying to set device disabled for "ETPS/2 Elantech Touchpad" (12) (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: Disabled device "ETPS/2 Elantech Touchpad" (12) (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: +++(2) KEY_TOUCHPAD_ENABLED, value=0 +++ (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG touchpad_callback EXIT === (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG device_removed_cb ENTER === (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG ensure_touchpad_active ENTER ===, gsettings key: 0 (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG touchpad_callback ENTER === (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: +++(2) KEY_TOUCHPAD_ENABLED, value=1 +++ (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG touchpad_callback EXIT === (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG ensure_touchpad_active EXIT ===, gsettings key: 1 (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG device_removed_cb EXIT === =============================== 1st TOUCHPAD HOTKEY TRIGGER END =============================== 2-a) Press Fn+F9 again the touchpad is still disabled. 2-b) The gsettings KEY_TOUCHPAD_ENABLED is set to 0 (FALSE), I think it is changed by usd-media-key. 2-c) I think because device is removed from the list, nothing happend in this stage. * Press Fn+F9 to enable touchpad =============================== 2nd TOUCHPAD HOTKEY TRIGGER START =============================== (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG touchpad_callback ENTER === (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: +++(2) KEY_TOUCHPAD_ENABLED, value=0 +++ (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG touchpad_callback EXIT === =============================== 2nd TOUCHPAD HOTKEY TRIGGER END =============================== 3-a) Press Fn+F9 again, the gsettings KEY_TOUCHPAD_ENABLED is set to 1(TRUE), it should be set by usd-media-key 3-b) The touchpad_callback eanbles touchpad. * Press Fn+F9 to enable touchpad =============================== 3rd TOUCHPAD HOTKEY TRIGGER START =============================== (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG touchpad_callback ENTER === (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: +++(2) KEY_TOUCHPAD_ENABLED, value=1 +++ (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: @@@ set_toucpad_enabled :12 @@@ (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: Trying to set device enabled for 12 (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: Enabled device 12 (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG touchpad_callback EXIT === (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG device_added_cb ENTER === (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: setting handedness on ETPS/2 Elantech Touchpad (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: setting tap to click on ETPS/2 Elantech Touchpad (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: setting motion on ETPS/2 Elantech Touchpad (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: Setting accel -1/-1, threshold -1 for device 'ETPS/2 Elantech Touchpad' (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: setting tap to click on ETPS/2 Elantech Touchpad (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: setting edge scroll on ETPS/2 Elantech Touchpad (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: setting horiz scroll on ETPS/2 Elantech Touchpad (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: Trying to set normal scroll for "ETPS/2 Elantech Touchpad" (lt-usd-test-mouse:16396): mouse-plugin-DEBUG: === DEBUG device_added_cb EXIT === =============================== 3rd TOUCHPAD HOTKEY TRIGGER END =============================== According to my analysis, the touchpad disable hotkey should work fine if ensure_touchpad_active does nothing. I looks the changelog in unity-settings-daemon, this function is added because of the issue: https://bugzilla.gnome.org/show_bug.cgi?id=685941 I think users should be able to disable the touchpad if there has control keys. Should we keep ensure_touchpad_active this function? ** Bug watch added: GNOME Bug Tracker #685941 https://bugzilla.gnome.org/show_bug.cgi?id=685941 ** Attachment added: "run-usd-test.log" https://bugs.launchpad.net/ubuntu/+source/unity-settings-daemon/+bug/1454950/+attachment/4397228/+files/run-usd-test.log -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1454950 Title: It needs to press touchpad hotkey twice to re-enable touchpad Status in unity-settings-daemon package in Ubuntu: New Bug description: I have a laptop: ASUS P452L and it has a hotkey (Fn+F9) to disable touchpad function. I found when I use the hotkey to disable the touchpat and then I have to press the hotkey twice to re-enable it. This is symptom cannot be found if: 1) using Kubuntu. 2) plug the usb mouse (any port is ok) Because it can't be reproduced in Kubuntu, I think it should be an issue of unity-settings-daemon. Platform: ASUS P451L Ubuntu: 14.04-LTS Unity-setting-daemon version: 14.04.0+14.04.20140606-0ubuntu2 Touchpad vendor: Elantech Note: This issue can be reproduced in Ubuntu 15.04. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-settings-daemon/+bug/1454950/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
