`AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT=y` causes AMDGPU to fail on Ryzen: amdgpu: SME is not compatible with RAVEN

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Dear Tom, dear Linux folks,


Selecting the symbol `AMD_MEM_ENCRYPT` – as done in Debian 5.13.9-1~exp1 [1] – also selects `AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT`, as it defaults to yes, causing boot failures on AMD Raven systems. On the MSI B350M MORTAR with AMD Ryzen 3 2200G, Linux logs and the AMDGPU graphics driver, despite being loaded, does not work, and the framebuffer driver is used instead.

[ 19.679824] amdgpu 0000:26:00.0: amdgpu: SME is not compatible with RAVEN

It even causes black screens on other systems as reported to the Debian bug tracking system *Black screen on AMD Ryzen based systems (AMDGPU related when AMD Secure Memory Encryption not disabled -- mem_encrypt=off)* [2].

Should the default be changed?


Kind regards,

Paul


[1]: https://salsa.debian.org/kernel-team/linux/-/blob/master/debian/changelog#L1138
[2]: https://bugs.debian.org/994453



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