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Good news for AMD Linux users - fTPM RNG will soon be disabled
(www.phoronix.com)
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this post was submitted on 08 Aug 2023
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Does this affect older Ryzens as well? I've noticed some periodic hitching in games/videos cropping up on occasion.
Hard to say. It's a firmware problem so presumably it could be affecting all of them. The CPUs aren't involved. My guess given the details mentioned by Linus is that it could affect some boards and not others, depending on what else is going on in the boards' firmware at the time when the rand call to is made. In other words, there might be other bugs present in the firmware of say ASUS that trigger this, which aren't present on MSI. And then there might be bugs present in this or that particular model's firmware. It's a whackamole which is why they decided to disable it altogether.
I believe it's only older Ryzen that is affected. If you have a newer gen Ryzen you are good (for now).
Edit - I'm a sleep deprived dumb dumb, I thought this was about the new Ryzen "bleed" vulnerability. 😩