Hi Po-Hsu,
I spent this evening installing Ubuntu.   I tried Xenial, Bionic, Focal and Groovy.
The proposed release worked on Xenial, but not on any of the others. 

Just to confirm the process: I installed a fresh copy of the release, then went to the developer options tab and ticked the proposed box.  Then updated and then upgraded.   Rebooted and then tested for the trackpad function. 

Let me know if I needed to do something different or to try again.
Regards,Tom

    On Sunday, January 17, 2021, 10:15:47 PM EST, Po-Hsu Lin <email address hidden> wrote:  
 
 Hello Tom,

It will be great if you can help out to verify this.

To do so for Xenial, you will need to install Ubuntu Xenial and enable
the "proposed" pocket [1] on it, then dist-upgrade to the latest kernel
and reboot to see if it works.

The same applies to other releases, you can verify the version that you can.
Thanks!

[1] https://wiki.ubuntu.com/Testing/EnableProposed

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https://bugs.launchpad.net/bugs/1906128

Title:
  Touchpad not detected on ByteSpeed C15B laptop

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed
Status in linux source package in Focal:
  Fix Committed
Status in linux source package in Groovy:
  Fix Committed
Status in linux source package in Hirsute:
  In Progress

Bug description:
  [Impact]
  Touchpad on a ByteSpeed C15B laptop is not working.
  User will need to add i8042.noloop=1 to boot options to make it work.

  [Fix]
  * a48491c65b513e ("Input: i8042 - add ByteSpeed touchpad to noloop table")

  This fix can be cherry-picked into all affected releases.

  [Test Case]
  Test kernel for Bionic / Focal can be found here:
  https://people.canonical.com/~phlin/kernel/lp-1906128-C15B/

  And they have been tested with positive test results.

  [Where problems could occur]
  The fix is just a small and simple hardware quirk. I can't think of any potential problem for now.

  == Original Bug Report ==
  Touchpad hardware is OK and works for Win10.  Not working for live disc, not for 18.04 and not for 20.04 after upgrading.  I've attached a Logitech wireless mouse with its USB adapter and that works.  Bluetooth is also missing, but I have not started trying to skull that out.  I'm happy to help try debugging things, and to help resolve the issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.4.0-54-generic 5.4.0-54.60
  ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65
  Uname: Linux 5.4.0-54-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.12
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  tom        1395 F.... pulseaudio
   /dev/snd/controlC0:  tom        1395 F.... pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Nov 28 19:09:05 2020
  InstallationDate: Installed on 2020-01-26 (307 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
  MachineType: ByteSpeed LLC ByteSpeed Laptop C15B
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-54-generic root=UUID=07b919ee-c6ad-41a5-9c64-df3c8e477b6f ro quiet splash i8042.reset i8042.nomux i8042.nopnp i8042noloop noapic vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.4.0-54-generic N/A
   linux-backports-modules-5.4.0-54-generic  N/A
   linux-firmware                            1.187.4
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to focal on 2020-11-25 (3 days ago)
  dmi.bios.date: 03/18/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: C15B.616
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: C15B
  dmi.board.vendor: PEGATRON CORPORATION
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: ByteSpeed LLC
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrC15B.616:bd03/18/2014:svnByteSpeedLLC:pnByteSpeedLaptopC15B:pvr1.0:rvnPEGATRONCORPORATION:rnC15B:rvr1.0:cvnByteSpeedLLC:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.family: PEGA Family
  dmi.product.name: ByteSpeed Laptop C15B
  dmi.product.sku: 0
  dmi.product.version: 1.0
  dmi.sys.vendor: ByteSpeed LLC

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