[SOLVED] Touchpad Double Click Doesn't Work

peregin55 · 11-19-2014, 08:30 PM

I have a Lenovo Thinkpad and the touchpad works fine (movement, scrolling, single-click, etc.) - but the double-click doesn't work. I'm running Gentoo with the synaptics driver.

In the xev tool, the first click is registered but the subsequent clicks seem to get lost. For what it's worth, an external mouse works fine.

Here's the output of synclient -l:

Code:

Parameter settings:
    LeftEdge                = 1310
    RightEdge               = 4826
    TopEdge                 = 2220
    BottomEdge              = 4636
    FingerLow               = 25
    FingerHigh              = 30
    MaxTapTime              = 180
    MaxTapMove              = 218
    MaxDoubleTapTime        = 180
    SingleTapTimeout        = 180
    ClickTime               = 100
    EmulateMidButtonTime    = 0
    EmulateTwoFingerMinZ    = 282
    EmulateTwoFingerMinW    = 7
    VertScrollDelta         = 99
    HorizScrollDelta        = 99
    VertEdgeScroll          = 0
    HorizEdgeScroll         = 0
    CornerCoasting          = 0
    VertTwoFingerScroll     = 1
    HorizTwoFingerScroll    = 0
    MinSpeed                = 1
    MaxSpeed                = 1.75
    AccelFactor             = 0.0403307
    TouchpadOff             = 0
    LockedDrags             = 0
    LockedDragTimeout       = 5000
    RTCornerButton          = 0
    RBCornerButton          = 0
    LTCornerButton          = 0
    LBCornerButton          = 0
    TapButton1              = 0
    TapButton2              = 0
    TapButton3              = 0
    ClickFinger1            = 1
    ClickFinger2            = 3
    ClickFinger3            = 2
    CircularScrolling       = 0
    CircScrollDelta         = 0.1
    CircScrollTrigger       = 0
    CircularPad             = 0
    PalmDetect              = 0
    PalmMinWidth            = 10
    PalmMinZ                = 200
    CoastingSpeed           = 20
    CoastingFriction        = 50
    PressureMotionMinZ      = 30
    PressureMotionMaxZ      = 160
    PressureMotionMinFactor = 1
    PressureMotionMaxFactor = 1
    GrabEventDevice         = 1
    TapAndDragGesture       = 1
    AreaLeftEdge            = 0
    AreaRightEdge           = 0
    AreaTopEdge             = 0
    AreaBottomEdge          = 0
    HorizHysteresis         = 24
    VertHysteresis          = 24
    ClickPad                = 1
    RightButtonAreaLeft     = 3068
    RightButtonAreaRight    = 0
    RightButtonAreaTop      = 4326
    RightButtonAreaBottom   = 0
    MiddleButtonAreaLeft    = 0
    MiddleButtonAreaRight   = 0
    MiddleButtonAreaTop     = 0
    MiddleButtonAreaBottom  = 0

I don't see any driver-related errors in dmesg.

Code:

[  +0.055064] psmouse serio1: synaptics: Touchpad model: 1, fw: 8.1, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x12
f800, board id: 2964, fw id: 2560
[  +0.000898] psmouse serio1: synaptics: serio: Synaptics pass-through port at isa0060/serio1/input0

Has anyone else run into this?
Thanks for your help!

jlinkels · 11-21-2014, 05:10 AM

I did not into this because in my xorg.conf MaxDoubleTaptime is not specified. The manual is not completely clear about what it means, but I suppose MaxDoubleTapTime is the interval in which two taps must have been detected. 180 ms seems quite short to me. Can you try to increase to 500?

jlinkels

xtknight · 11-29-2014, 11:39 PM

I just came across something. I was having the exact same problem with an HP Envy x360 Clickpad, and lo and behold this fixed it. The ButtonRelease event wasn't being sent when the button was released: it was only sent when all fingers were off the touchpad, and this caused odd, irritating behavior.

http://permalink.gmane.org/gmane.lin...el.input/38497

Yes, it's in the kernel, but you can just recompile this one kernel module. ( Outline of how to do that: http://askubuntu.com/questions/16827...-kernel-module )

1. Download kernel source for your distro, do preparation steps like it says in guide above.
For me on Debian unstable:

Code:

# apt-get install linux-headers-`uname -r`
# apt-get install linux-source-3.16
# cd /usr/src
# tar xf linux-source*.xz
# cd linux-source-3.16*
# cp ../linux-headers-`uname -r`/Module.symvers .
# make oldconfig

and edit drivers/input/mouse/synaptics.c:

Comment out the entire clause "if (SYN_CAP_FORCEPAD(priv->ext_cap_0c)) {"
(Just put an #if 0 and #endif around the whole thing and the last else...patch shown below

Code:

--- old/linux-source-3.16/drivers/input/mouse/synaptics.c	2014-10-30 12:41:01.000000000 -0400
+++ linux-source-3.16/drivers/input/mouse/synaptics.c	2014-11-30 00:23:08.612060641 -0500
@@ -643,7 +643,7 @@
 
 		hw->left  = (buf[0] & 0x01) ? 1 : 0;
 		hw->right = (buf[0] & 0x02) ? 1 : 0;
-
+#if 0
 		if (SYN_CAP_FORCEPAD(priv->ext_cap_0c)) {
 			/*
 			 * ForcePads, like Clickpads, use middle button
@@ -680,7 +680,9 @@
 
 			hw->left = priv->report_press;
 
-		} else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
+		} else
+#endif 
+		if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 			/*
 			 * Clickpad's button is transmitted as middle button,
 			 * however, since it is primary button, we will report

2. Prepare and make modules

Code:

# make prepare
# make modules_prepare
# make SUBDIRS=scripts/mod
# make SUBDIRS=drivers/input/mouse modules

3. Overwrite current modules

Code:

# rmmod psmouse
(Removing the module will disable your mouse, but it will soon be reactivated)
(Also if you have any modules containing 'synaptics' loaded, just unload those...check lsmod)
# cp drivers/input/mouse/*.ko /lib/modules/`uname -r`/kernel/drivers/input/mouse
# depmod -a
# modprobe psmouse

4. Now, it should be fixed. If it isn't, try rebooting in case somehow all the modules didn't get unloaded.

peregin55 · 12-20-2014, 02:59 PM

Thank you! That fixed the issue.