What is KVS?
KVS is a side project of mine that will change your current tpm_kernver to ANY version
This works using the hexdumps of 0x1008 (kernver TPM index) and tpmc to write the hexdumps of your selected kernver to the 0x1008 TPM index.
How do I use this?
YOU MUST BE UNENROLLED TO USE KVS! ANY ISSUES REPORTED RELATING TO BEING ENROLLED WHILE TRYING TO USE THIS WILL GET CLOSED IMMEDIATELY
To use KVS, you must download your shim from kxtz' shim mirror
After downloading, flash your USB/SD with the file, I recommend Chrome Recovery Utility.
FAQ
Q: Will this brick my device?
A: No, KVS has no way to permanantly brick / hard brick a device. At most, it will make ChromeOS stop booting, but you will still be able to boot shims to recover the kernver index.
Q: What kernvers are there?
A: There are 4,294,967,296 possible kernel versions (0x00000000 - 0xFFFFFFFF)
Q: What versions can I downgrade to with kernver _
A: Heres what versions you can downgrade to with each offical kernver
kernver 0: any
kernver 1: any
kernver 2: 112 - 119
kernver 3: 120 - 124
kernver 4: 125 - 129
kernver 5: 130 - ???
Q: What is the difference between kernver 0 and kernver 1?
A: literally none, its just cool to see :3
Credits
kxtzownsu - Writing KVS
OlyB - Helping me with the shim builder, most of the shim builder wouldn't exist without him.
Google - Writing the tpmc command :3