This bug is awaiting verification that the linux-
realtime-6.11/6.11.0-1003.3~24.04.2 kernel in -proposed solves the
problem. Please test the kernel and update this bug with the results. If
the problem is solved, change the tag 'verification-needed-noble-linux-
realtime-6.11' to 'verification-done-noble-linux-realtime-6.11'. If the
problem still exists, change the tag 'verification-needed-noble-linux-
realtime-6.11' to 'verification-failed-noble-linux-realtime-6.11'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-noble-linux-realtime-6.11-v2 
verification-needed-noble-linux-realtime-6.11

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-6.11 in Ubuntu.
https://bugs.launchpad.net/bugs/2080322

Title:
  [SRU] Disable CONFIG_TCG_TPM2_HMAC to avoid performance loss after
  v6.10

Status in linux package in Ubuntu:
  Fix Released
Status in linux-oem-6.11 package in Ubuntu:
  Invalid
Status in linux source package in Noble:
  Invalid
Status in linux-oem-6.11 source package in Noble:
  Fix Released
Status in linux source package in Oracular:
  Fix Released
Status in linux-oem-6.11 source package in Oracular:
  Invalid

Bug description:
  [Impact]
  significant delays at bootup, the bootup time is 7 sec when this feature is 
disabled,
  but 20 sec when it's enabled.

  [Fix]
  v6.10-rc1 introduce encryption overhead to all kernel to TPM transactions,
  Disable it by default until there is a real fix.

  [Test]
  Tested on hardware, bootup is 7 sec as 6.8 noble kernel.

  [Where problems could occur]
  It may less security or break TPM.

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