You can tell the kernel to ignore particular devices that might wake the
machine up by:

  sudo sh -c 'echo NAME > /proc/acpi/wakeup'

That will just toggle device NAME between enabled (can wake up) or
disabled (can't wake up). But the hard part is figuring out which device
name from /proc/acpi/wakeup is relevant to the USB keyboard. Maybe 'XHC'
representing the USB controller?

Your BIOS might also have settings to control which devices can wake the
machine up.

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: Incomplete => Triaged

** Summary changed:

- System wakes from suspend almost immediately
+ [ThinkPad X1 Carbon] System wakes from suspend almost immediately if USB 
keyboard is plugged in

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https://bugs.launchpad.net/bugs/1970155

Title:
  [ThinkPad X1 Carbon] System wakes from suspend almost immediately if
  USB keyboard is plugged in

Status in linux package in Ubuntu:
  Triaged

Bug description:
  Suspend mode does not seems to work. Clicking on suspend button sends
  laptop in suspend mode and in few seconds laptop comes out of suspend
  mode and shows login screen again.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: xorg 1:7.7+23ubuntu2
  ProcVersionSignature: Ubuntu 5.15.0-25.25-generic 5.15.30
  Uname: Linux 5.15.0-25-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: pass
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Apr 25 10:31:56 2022
  DistUpgraded: Fresh install
  DistroCodename: jammy
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] 
(rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f9]
  InstallationDate: Installed on 2022-04-22 (2 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 
(20220419)
  MachineType: LENOVO 34601F4
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-25-generic 
root=UUID=be040347-6300-407e-9e19-da58389c3a6f ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/19/2013
  dmi.bios.release: 2.59
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G6ET99WW (2.59 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 34601F4
  dmi.board.vendor: LENOVO
  dmi.board.version: NO DPK
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.ec.firmware.release: 1.4
  dmi.modalias: 
dmi:bvnLENOVO:bvrG6ET99WW(2.59):bd11/19/2013:br2.59:efr1.4:svnLENOVO:pn34601F4:pvrThinkPadX1Carbon:rvnLENOVO:rn34601F4:rvrNODPK:cvnLENOVO:ct10:cvrNotAvailable:skuLENOVO_MT_3460:
  dmi.product.family: ThinkPad X1 Carbon
  dmi.product.name: 34601F4
  dmi.product.sku: LENOVO_MT_3460
  dmi.product.version: ThinkPad X1 Carbon
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.110-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 22.0.1-1ubuntu2
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:21.1.3-2ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2build3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20210115-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.17-2build1

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