Public bug reported:

When booting the tpm chip times out and is not showing up in /dev.
Relevant Output of "dmesg | grep -i tpm":
[    2.996408] tpm tpm0: Operation Timed out
[    6.202396] tpm tpm0: Operation Timed out
[    6.202401] tpm_crb: probe of MSFT0101:00 failed with error -62
[    6.255296] ima: No TPM chip found, activating TPM-bypass!
I confirmed that it is the kernel by switching to 6.5.0-45-generic and 
everything worked.
Ubuntu release: Ubuntu 22.04.4 LTS
linux-hwe-6.8-headers-6.8.0-40 version: 6.8.0-40.40~22.04.3
linux-hwe-6.8-tools-6.8.0-40 version: 6.8.0-40.40~22.04.3
linux-image-6.8.0-40-generic version: 6.8.0-40.40~22.04.3

Expected behavior: tpm working

What happened: tpm timed out and is not showing up, so it can't be used

** Affects: linux-hwe-6.8 (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  When booting the tpm chip times out and is not showing up in /dev.
  Relevant Output of "dmesg | grep -i tpm":
  [    2.996408] tpm tpm0: Operation Timed out
  [    6.202396] tpm tpm0: Operation Timed out
  [    6.202401] tpm_crb: probe of MSFT0101:00 failed with error -62
  [    6.255296] ima: No TPM chip found, activating TPM-bypass!
  I confirmed that it is the kernel by switching to 6.5.0-45-generic and 
everything worked.
  Ubuntu release: Ubuntu 22.04.4 LTS
  linux-hwe-6.8-headers-6.8.0-40 version: 6.8.0-40.40~22.04.3
  linux-hwe-6.8-tools-6.8.0-40 version: 6.8.0-40.40~22.04.3
+ linux-image-6.8.0-40-generic version: 6.8.0-40.40~22.04.3
  
  Expected behavior: tpm working
  
  What happened: tpm timed out and is not showing up, so it can't be used

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Packages, which is subscribed to linux-hwe-6.8 in Ubuntu.
https://bugs.launchpad.net/bugs/2077121

Title:
  tpm chip timeout at boot

Status in linux-hwe-6.8 package in Ubuntu:
  New

Bug description:
  When booting the tpm chip times out and is not showing up in /dev.
  Relevant Output of "dmesg | grep -i tpm":
  [    2.996408] tpm tpm0: Operation Timed out
  [    6.202396] tpm tpm0: Operation Timed out
  [    6.202401] tpm_crb: probe of MSFT0101:00 failed with error -62
  [    6.255296] ima: No TPM chip found, activating TPM-bypass!
  I confirmed that it is the kernel by switching to 6.5.0-45-generic and 
everything worked.
  Ubuntu release: Ubuntu 22.04.4 LTS
  linux-hwe-6.8-headers-6.8.0-40 version: 6.8.0-40.40~22.04.3
  linux-hwe-6.8-tools-6.8.0-40 version: 6.8.0-40.40~22.04.3
  linux-image-6.8.0-40-generic version: 6.8.0-40.40~22.04.3

  Expected behavior: tpm working

  What happened: tpm timed out and is not showing up, so it can't be
  used

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.8/+bug/2077121/+subscriptions


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