Okay, just went back over some things to confirm in case anyone else is
encountering this issue. First, here's my setup:

1. Lenovo 330s-15arr with BIOS version 7WCN28WW.
2. BIOS settings are default for the most part (UEFI boot, etc).

With the above BIOS version, booting into Ubuntu with noapic line hoses
the keyboard and it will not work again (even in the BIOS!) until the
system has been booted into Windows. After booting into Windows, this
seems to "reset" something on the keyboard. USB keyboard/mouse works
fine though, so you can diagnose/fix this issue with that if you don't
have dual boot configured.

Per Kenji's instructions above, edited /etc/default/grub and added
ivrs_ioapic[32]=00:14.0 to the grub cmds, ran update-grub and now
everything boots with the following to be confirmed working:

1. Wireless (including 5ghz),
2. Bluetooth,
3. Keyboard, including hotkeys in Fn+Hotkey setup (this is a toggle in the BIOS 
I prefer),
4. Touchpad, including multi touch scrolling and two finger tap for context 
menu,
5. Graphics acceleration, tested with glxinfo and glmark2.

To really drive this home, I am about to attempt a reinstall from
scratch blowing away Windows. On the installer boot line, I will be
adding the above ivrs_ioapic as well to ensure installer has proper
resource access. This will make double sure I don't have some other
customization out there helping with this.

Will report back soon.

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https://bugs.launchpad.net/bugs/1795292

Title:
  ELAN469D touch pad not working

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