Re: Synaptics touchpad not working after suspend, psmouse.synaptics_intertouch

[Aditya Garg <gargaditya08@live.com>]

Hi Hias

> On 2 May 2025, at 1:34 AM, arch.hias@eilert.tech wrote:
> 
> Hi,
> 
> I'm experiencing an issue with the Synaptics touchpad on my laptop not working after resuming from suspend.
> 
> This began after upgrading from linux-lts 6.12.19-1 -> 6.12.21-1 [2]
> 
> 
> Hardware:
> - Touchpad: SynPS/2 Synaptics TouchPad (PNP: SYN1221 PNP0f13)
> - Distro: Arch Linux issue began after systemupgrade linux-lts (6.12.19-1 -> 6.12.21-1) (kernel 6.12.24-1-lts)
> 
> Description:
> After resuming from suspend, the touchpad is not detected. However, if I suspend and resume a second time, it works again. While checking the logs, I found the following kernel message:
> 
> kernel: psmouse serio2: synaptics: Your touchpad (PNP: SYN1221 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 and report this to linux-input@vger.kernel.org.
> 
> I had previously set `psmouse.synaptics_intertouch=0`, as recommended in the Arch Wiki[1].
> After changing it to `1`, the touchpad now consistently works after suspend.
> 
> This setting appears to resolve the issue for my device. I wanted to share this in case it’s helpful for others or worth considering for default handling of this hardware.
> 
> # libinput list-devices | grep Synaptics -A4
> Device:                  Synaptics TM3175-002
> Kernel:                  /dev/input/event13
> Id:                      <unknown>:06cb:0000
> Group:                   6
> Seat:                    seat0, default
> 
> $ udevadm info /dev/input/event13
> P: /devices/pci0000:00/0000:00:1f.4/i2c-6/6-002c/rmi4-00/input/input21/event13
> M: event13
> R: 13
> J: c13:77
> U: input
> D: c 13:77
> N: input/event13
> L: 0
> S: input/by-path/pci-0000:00:1f.4-event-mouse
> E: DEVPATH=/devices/pci0000:00/0000:00:1f.4/i2c-6/6-002c/rmi4-00/input/input21/event13
> E: DEVNAME=/dev/input/event13
> E: MAJOR=13
> E: MINOR=77
> E: SUBSYSTEM=input
> E: USEC_INITIALIZED=40782030
> E: ID_INPUT=1
> E: ID_INPUT_TOUCHPAD=1
> E: ID_INPUT_WIDTH_MM=81
> E: ID_INPUT_HEIGHT_MM=39
> E: ID_BUS=rmi
> E: ID_SERIAL=noserial
> E: ID_PATH=pci-0000:00:1f.4
> E: ID_PATH_TAG=pci-0000_00_1f_4
> E: ID_INPUT_TOUCHPAD_INTEGRATION=internal
> E: LIBINPUT_DEVICE_GROUP=1d/6cb/0:rmi4-00
> E: DEVLINKS=/dev/input/by-path/pci-0000:00:1f.4-event-mouse
> 
> Links:
> 
> 1: https://wiki.archlinux.org/title/Touchpad_Synaptics#Touchpad_does_not_work_after_resuming_from_hibernate/suspend
> 
> 2: http://0x0.st/84b8.txt
> 
> 
> Let me know if I can provide further Information, logs or tests.
> 
> Best regards,
> 
> hias
> 
>      The ASCII Ribbon Campaign
> ()     No HTML/RTF in email
> /\     No Word docs in email
>     Respect for open standards


Please test this patch for your device:

—>8—

From ace747d33f1b9d329309c277879fa8a632606c93 Mon Sep 17 00:00:00 2001
From: Aditya Garg <gargaditya08@live.com>
Date: Sun, 4 May 2025 11:46:44 +0530
Subject: [PATCH] Update synaptics.c

---
 drivers/input/mouse/synaptics.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 309c360aab5597..24db13ceae3ba2 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -195,6 +195,7 @@ static const char * const smbus_pnp_ids[] = {
 	"SYN3221", /* HP 15-ay000 */
 	"SYN323d", /* HP Spectre X360 13-w013dx */
 	"SYN3257", /* HP Envy 13-ad105ng */
+	"SYN1221",
 	NULL
 };
 #endif

--------

You can also download the patch from: https://github.com/AdityaGarg8/linux/commit/ace747d33f1b9d329309c277879fa8a632606c93.patch


Also, please share you laptops model (Eg: HP Envy 13-ad105ng)

And if you want to be credited for your report, please share your full legal name and email.

Thanks
Aditya