10 February 2018

Touchpad troubles

by Mike Mol

So, my Lenovo Yoga 13 has always had trouble with its touchpad. Previously, on a cold boot, the touchpad wouldn’t work. Simply suspending and resuming the laptop would be enough to make it work, so it wasn’t a huge concern.

With the latest round of updates, though, now the touchpad doesn’t work at all, and I’m left with using either the touchscreen or some external device for a mouse. Nothing I’ve tried has managed to bring back my touchpad, and I’m suspecting it’s not even showing up under lsusb any more…but I’m not even sure what’s supposed to show up for this hardware; it’s never been a popular model among Linux users.

Any suggestions welcome.

Here’s some of the output of dmidecode:

System Information
 Manufacturer: LENOVO
 Product Name: Mocca 2.0
 Version: Lenovo Ideapad YOGA 13
 Wake-up Type: Power Switch
 SKU Number: LENOVO_BI_IDEAPAD66
 Family: IDEAPAD

Here’s the output of lsusb:

Bus 002 Device 004: ID 04f2:b322 Chicony Electronics Co., Ltd 
Bus 002 Device 003: ID 2047:0855 Texas Instruments Invensense Embedded MotionApp HID Sensor
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 005: ID 04f3:000a Elan Microelectronics Corp. Touchscreen
Bus 001 Device 004: ID 0bda:1724 Realtek Semiconductor Corp. RTL8723AU 802.11n WLAN Adapter
Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Here’s the output of lsusb -t:

/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
        |__ Port 5: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 7: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M
        |__ Port 7: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 3: Dev 3, If 0, Class=Vendor Specific Class, Driver=rtsx_usb, 480M
        |__ Port 4: Dev 4, If 1, Class=Wireless, Driver=btusb, 480M
        |__ Port 4: Dev 4, If 2, Class=Vendor Specific Class, Driver=rtl8xxxu, 480M
        |__ Port 4: Dev 4, If 0, Class=Wireless, Driver=btusb, 480M
        |__ Port 5: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 12M

(The content for this post was lost somehow. So this is a total rewrite. It’s bizarre, because I thought I viewed it on the live site. Ah well. This is what unit tests are for. Suppose I’ll need to figure out unit tests for my blog, like _there’s content in every file under _posts_! … Actually, that’s not a bad idea. Could possibly even validate that all the links and embedded resources work…I’m doing a git workflow for my blog, so why not?)

tags: