Linux: Enabling SMEE in BIOS leads to boot loop
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=25340
Printed Date: 22 Feb 2025 at 4:03pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Linux: Enabling SMEE in BIOS leads to boot loop
Posted By: kernie
Subject: Linux: Enabling SMEE in BIOS leads to boot loop
Date Posted: 11 Jan 2023 at 2:17am
Hi!
My system essentially is:
- ASROCK 650M PG Riptide mainboard with the latest BIOS updates 1.11.AS03 [Beta] flashed
- Ryzen 9 7950X cpu
- 64GB G.Skill Flare X5 DDR5-5600 DIMM CL36 Dual Kit RAM
In the BIOS I enabled the SMEE (memory encryption), but when doing so I'm stuck in a boot loop. I see the GRUB2 boot screen, start booting, black screen, again the GRUB2 boot screen.
Any ideas?
Thanks!
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Replies:
Posted By: eccential
Date Posted: 11 Jan 2023 at 3:21am
According to AMD's own site explaining the "extras" of their PRO line of processors, I see this: "AMD Memory Guard provides real time encryption of system memory to help protect against physical attacks..."
So I wonder if SMEE is only supported with "PRO" CPUs and APUs, disregarding they're all the same silicon dies, but with some features fused off, I guess.
And if so, I wonder if BIOS even allowing you to flip that option on non-PRO CPU is a bug.
But I don't know for sure.
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Posted By: ECC_4_Ryzen
Date Posted: 20 Feb 2025 at 11:21pm
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Same here... Motherboard manufacturers don't seem to care. AMD doesn't seem to care about their own advertising. No, eccential, SME is supported on non-pro AMD CPUs. This is well documented, but it is just marketing; it is a lie in reality.
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