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jayme-github/disable_raydium_touchscreen_thinkpad_x1_carbon_7th.md

Created March 28, 2020 11:37
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Disable Raydium Touch System touchscreen on ThinkPad X1 Carbon 7th gen
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disable_raydium_touchscreen_thinkpad_x1_carbon_7th.md

To make the usbhid driver ignore the touchscreen device, add a HID_QUIRK_IGNORE quirk as module paramater:

Add a modprobe file, like /etc/modprobe.d/disable_raydium_touchscreen.conf:

# Add/modify USB HID quirks by specifying
# quirks=vendorID:productID:quirks where vendorID, productID, and quirks are all in 0x-prefixed hex
#
# For a list of quirks, see https://github.com/torvalds/linux/blob/master/include/linux/hid.h
options usbhid quirks=0x2386:0x4328:0x00000004

To actually disable the device (or at least keep it in a suspended state), configure it to autosuspend as fast as possible:

This can be done via the package sysfsutils and a file like /etc/sysfs.d/autosuspend_raydium_touchscreen.conf:

bus/usb/devices/usb1/1-6/power/autosuspend_delay_ms = 0
bus/usb/devices/usb1/1-6/power/control = auto

Device bus or id might differ, see lsusb -t for the correct values.

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