It's fixed in Ubuntu-oem-6.11-6.11.0-1006.6 and Ubuntu-6.11.0-8.8.
Bootup time is as before like 7 seconds.
** Changed in: linux-oem-6.11 (Ubuntu Noble)
Status: In Progress => Fix Released
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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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