Further investigation reveals that this only occurs when S3 suspend is
enabled in BiOS. The default that is shipped is identified as s2idle in
systemd (just called "Windows 10 and Linux" in BiOS[1]) and is a sort of
software suspend that does not preserve much battery time (which is also
why I switched to S3). S3 is suspend to RAM I think.

I have upgraded to a new BiOS release that was made available today
(N32ET68W 1.44), and an update to the Embed Controller. This did not
help with the issue unfortunately.

Seeing as the touchpad works fine with the software suspend, but not the
S3 RAM suspend, is there perhaps some module that is not handled
correctly when waking up from a more thorough suspend?

[1] https://i.imgur.com/7ddEvpW.jpg

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https://bugs.launchpad.net/bugs/1938096

Title:
  [Lenovo X1 Carbon 9th] [SYNA8009:00 06CB:CE57] touchpad lagging after
  resume from suspend

Status in libinput package in Ubuntu:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  Hardware: Thinkpad X1 Carbon, 9th generation
  Touchpad: SYNA8009:00 06CB:CE57

  Right after a clean reboot, the touchpad works fine. No issues
  whatsoever. But after resuming from even its first suspend after a
  clean boot, the touchpad feels less responsive, choppy or even laggy.

  I have tried removing and re-inserting some HID kernel modules,
  "psmouse", and setting i915.psr_enabled=0 in kernelstubs. Haven't
  found anything that fixes it yet. The trackpoint works flawlessly all
  the time, so that is the current backup when I don't have an external
  mouse connected.

  My installed OS is Pop!_Os 21.04, but I have tested and confirmed this
  on a live USB with Ubuntu 21.04 as well.

  I have also tried upgrading to the latest 5.13.5 and 5.14.0rc2 kernels
  from the mainline PPA, and tried bumping the libinput10 to 1.18.0 from
  the impish repos.

  To recreate:
  1. Reboot a X1C9 machine and see that the touchpad works fine
  2. Suspend it (to RAM, need to change a BiOS setting so it doesn't do a 
software suspend)
  3. Resume from suspend and see that touchpad acts differently and less 
responsive than right after a clean boot

  What is expected:
  1. Same responsive touchpad experience after resuming from suspend as right 
after a clean boot.

  
  ---

  
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu65.1
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: unknown
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: pop:GNOME
  DistUpgraded: Fresh install
  DistroCodename: hirsute
  DistroRelease: Pop!_OS 21.04
  DistroVariant: ubuntu
  GraphicsCard:
   Intel Corporation TigerLake GT2 [Iris Xe Graphics] [8086:9a49] (rev 01) 
(prog-if 00 [VGA controller])
     Subsystem: Lenovo Iris Xe Graphics [17aa:22d5]
  MachineType: LENOVO 20XW005PMX
  Package: libinput10 1.18.0-1 [origin: unknown]
  PackageArchitecture: amd64
  ProcKernelCmdLine: 
initrd=\EFI\Pop_OS-e5934199-eb91-4da9-9e38-0ad1de1baeb2\initrd.img 
root=UUID=e5934199-eb91-4da9-9e38-0ad1de1baeb2 ro quiet 
systemd.show_status=false loglevel=0 splash
  Tags: hirsute third-party-packages ubuntu
  Uname: Linux 5.13.5-051305-generic x86_64
  UnreportableReason: This does not seem to be an official Pop!_OS package. 
Please retry after updating the indexes of available packages, if that does not 
work then remove related third party packages and try again.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm lpadmin plugdev sudo
  _MarkForUpload: True
  dmi.bios.date: 06/15/2021
  dmi.bios.release: 1.42
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N32ET66W (1.42 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20XW005PMX
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40697 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.ec.firmware.release: 1.26
  dmi.modalias: 
dmi:bvnLENOVO:bvrN32ET66W(1.42):bd06/15/2021:br1.42:efr1.26:svnLENOVO:pn20XW005PMX:pvrThinkPadX1CarbonGen9:skuLENOVO_MT_20XW_BU_Think_FM_ThinkPadX1CarbonGen9:rvnLENOVO:rn20XW005PMX:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.family: ThinkPad X1 Carbon Gen 9
  dmi.product.name: 20XW005PMX
  dmi.product.sku: LENOVO_MT_20XW_BU_Think_FM_ThinkPad X1 Carbon Gen 9
  dmi.product.version: ThinkPad X1 Carbon Gen 9
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.105-3~21.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.1-2pop0~1624392450~21.04~6fbdfd2
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.11-1ubuntu1.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200714-1ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-1

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