Pixelbook trackpad issues

Support macOS Support
1

Just got Big Sur installed on my i7 Pixelbook! (following the PixelbookOSX guide + dortania) Everything works except the trackpad - Karabiner does nothing for it. I tried to downgrade the touchpad’s firmware with the MrChromebox firmware tool, and now I’m getting stuck at AppleActuatorDeviceUserClient::start Entered during boot. I have VoodooI2C, I2CHID, and VoodooPS2 in my kexts folder. Does anyone know why I’m getting stuck here during boot/if there’s any more information I can provide?

2

It was super unreliable for me. It seems to work fine now after I downgraded the firmware though. Here’s my efi for monterey if it helps https://files.tree123.org/evEFI.zip

3

Just tried downgrading the firmware again, I got an error so I’m going to try booting into ChromeOS Flex and running the firmware utility from there

4

you absolutely cannot run it from Flex

5

yeah, just figured that out with some trial and error. i got the laptop pre-hacked with Fedora installed, no clue if the previous owner had already downgraded the touchpad firmware or not. I guess I’ll reinstall the original firmware with your utility, put the original ChromeOS on, re-do everything, and see if that helps

6

Fyi I ended up building my own version of flashrom capable of flashing the touchpad firmware https://files.tree123.org/utils/x86_64/gnu/flashrom_eve_tp

7

Just got the trackpad firmware to install successfully! I had to:

  • boot into the latest Linux Mint, launch the firmware utility
  • install the stock ChromeOS firmware
  • install the old touchpad firmware
  • install the UEFI firmware
  • reboot

I won’t mark it as solved quite yet, the trackpad still doesn’t do anything but the OS boots. waiting for Big Sur to reinstall so I can try Karabiner

8

KarabinerScreenshot
KarabinerScreenshot1800×1200 214 KB

Okay - no progress so far. It doesn’t seem like I need SSDT-GPI0 (strangely, it’s called GPIO with an O instead of a zero in my DSDT) and the trackpad DOES show up in System Settings and Karabiner. Still, no movement. Sending my config, DSDT, and IOReg dump here in case anyone with better knowledge of this can help…

9

This solved it! UEFI > Quirks > DisableSecurityPolicy