In fact, it has become so bad that Torvalds has recommended disabling it during runtime.

This year, it was found that Linux exhibited fTPM-related stuttering and freezing issues, which had been thought to be limited to Windows. The issue is something to HWRNG.

However, getting it fixed proved very tricky and on a patch note, Torvalds expressed his frustration in his usual understated way: “Let's just disable the stupid fTPM hwrnd thing. Maybe use it for the boot-time "gather entropy from different sources", but clearly it should *not* be used at runtime.”

“Why would anybody use that crud when any machine that has it supposedly fixed (which apparently didn't turn out to be true after all) would also have the CPU rdrand instruction that doesn't have the problem?”

Torvolds said he did not see any downside to just saying "that fTPM thing is not working". Even if it ends up working in the future, there are alternatives that aren't any worse.

“Now, I'm not saying that a fTPM needs to be disabled in general - but I really feel like we should just do and be done with it. But hey, if we have no way to see that whole "this is firmware emulation", then just blocking AMD might be the only way.”