After restarting my laptop recently, the touchpad no longer works under
kernel version 5.15.0-57-generic. (Same symptoms: the touchpad works in
the login screen, but the moment I log in, it stops working.) My best
guess is that this happened because of the linux-firmware update
(20220329.git681281e4-0ubuntu3.10, from
20220329.git681281e4-0ubuntu3.9), which of course regenerated the
initramfs for each kernel installed. (I installed this update before
restarting the computer.) But, that's only my best guess. Let me know if
I should mark this bug as affecting linux-firmware, or if you need any
other information.

Oh, and just to be thorough, I did try the newest kernel
(5.15.0-60-generic, newer than my original bug report), and the touchpad
still doesn't work (same symptoms as before). This was after installing
that linux-firmware update.

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https://bugs.launchpad.net/bugs/2004531

Title:
  Touchpad stops working after login when using latest kernel
  (5.15.0-58-generic)

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  After upgrading to the latest kernel (5.15.0-58-generic), my laptop’s
  touchpad has stopped working after the login screen. That is, it works
  on the login screen, but as soon as I log in (in fact, the moment I
  press enter after entering my password), the mouse cursor no longer
  responds to touchpad input. (I’ve made sure that my touchpad is
  enabled, both by using the touchpad enable/disable button on my
  laptop, and by checking in “Mouse Preferences” (Preferences → Mouse in
  the main menu) that the “Enable Touchpad” box is checked.) The mouse
  buttons below the touchpad, however, still work, and if I plug in a
  USB mouse, that will work as well.

  When I restart and select the previous kernel version
  (5.15.0-57-generic) on boot, the touchpad works again, on the login
  screen and after. Nevertheless, I’d really appreciate a fix; this
  laptop is dear to me, and I’d like to be able to use it with the
  latest kernel updates.

  I’m using Ubuntu MATE 22.04.01 LTS on a Compaq Presario CQ60.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: linux-image-5.15.0-58-generic 5.15.0-58.64
  ProcVersionSignature: Ubuntu 5.15.0-58.64-generic 5.15.74
  Uname: Linux 5.15.0-58-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tina       2670 F.... pulseaudio
  CasperMD5CheckResult: unknown
  CurrentDesktop: MATE
  Date: Wed Feb  1 18:36:00 2023
  HibernationDevice: RESUME=UUID=3e371ef8-1061-4c6d-b9ab-a072575893c9
  InstallationDate: Installed on 2018-05-24 (1715 days ago)
  InstallationMedia: Ubuntu-MATE 18.04 LTS "Bionic Beaver" - Release amd64 
(20180426)
  MachineType: Hewlett-Packard Compaq Presario CQ60 Notebook PC
  ProcFB: 0 nouveaudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-58-generic 
root=UUID=1e6f5cc4-d098-4aaa-9a26-4f3808cfd68d ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.15.0-58-generic N/A
   linux-backports-modules-5.15.0-58-generic  N/A
   linux-firmware                             20220329.git681281e4-0ubuntu3.9
  SourcePackage: linux
  UpgradeStatus: Upgraded to jammy on 2023-01-11 (21 days ago)
  dmi.bios.date: 02/04/2009
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: F.33
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 3617
  dmi.board.vendor: Wistron
  dmi.board.version: 09.48
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Wistron
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnHewlett-Packard:bvrF.33:bd02/04/2009:svnHewlett-Packard:pnCompaqPresarioCQ60NotebookPC:pvrF.33:rvnWistron:rn3617:rvr09.48:cvnWistron:ct10:cvrChassisVersion:skuNL058PA#AB2:
  dmi.product.family: 103C_5335KV
  dmi.product.name: Compaq Presario CQ60 Notebook PC
  dmi.product.sku: NL058PA#AB2
  dmi.product.version: F.33
  dmi.sys.vendor: Hewlett-Packard

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