ELAN1301 I2C touchpad stops generating events on ASUS Vivobook X412DA

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Hello,

I have an ASUS Vivobook X412DA with OpenBSD 7.9 GENERIC.MP#449 amd64.

The internal touchpad is detected as:

ihidev0 at iic0 addr 0x15 gpio 89, vendor 0x4f3 product 0x30c6, ELAN1301
imt0 at ihidev0: clickpad, 5 contacts
wsmouse0 at imt0 mux 0

The touchpad works after boot, but after some use it stops generating
events.
The device does not detach and no error appears in dmesg.

After the failure:
- /dev/wsmouse0 still exists
- Xorg still has wsmouse0 open
- wsconsctl shows mouse.tp.disable=0
- restarting xenodm does not restore the touchpad
- the BIOS option "Internal Pointing Device" is enabled

A USB mouse continues to work.

The failure pattern:
If the laptop is left idle after boot, the touchpad keeps working.
After moving the touchpad, it works for a few minutes and then stops.

This looks like the I2C HID device stops producing reports, but the kernel
still keeps the device attached.

Is this a known issue with ELAN1301 / imt(4) / ihidev(4)?

Thank you.

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<div dir=3D"ltr">Hello,<br><br>I have an ASUS Vivobook X412DA with OpenBSD =
7.9 <a href=3D"http://GENERIC.MP#449">GENERIC.MP#449</a> amd64.<br><br>The =
internal touchpad is detected as:<br><br>ihidev0 at iic0 addr 0x15 gpio 89,=
 vendor 0x4f3 product 0x30c6, ELAN1301<br>imt0 at ihidev0: clickpad, 5 cont=
acts<br>wsmouse0 at imt0 mux 0<br><br>The touchpad works after boot, but af=
ter some use it stops generating events.<br>The device does not detach and =
no error appears in dmesg.<br><br>After the failure:<br>- /dev/wsmouse0 sti=
ll exists<br>- Xorg still has wsmouse0 open<br>- wsconsctl shows mouse.tp.d=
isable=3D0<br>- restarting xenodm does not restore the touchpad<br>- the BI=
OS option &quot;Internal Pointing Device&quot; is enabled<br><br>A USB mous=
e continues to work.<br><br>The failure pattern:<br>If the laptop is left i=
dle after boot, the touchpad keeps working.<br>After moving the touchpad, i=
t works for a few minutes and then stops.<br><br>This looks like the I2C HI=
D device stops producing reports, but the kernel still keeps the device att=
ached.<br><br>Is this a known issue with ELAN1301 / imt(4) / ihidev(4)?<br>=
<br>Thank you.</div>

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