CPUID=RDSEED32 Trouble

Chat about Zorin
1

Hello to all,
The message cpuid=rdseed32 appears during booting;
it's not possible to boot Ubuntu 26.04 beta Live USB!
On another machine with Win 11 i can boot from stick.
i'v tried some solutions, but nothing helped.
At this time no new Bios is available.
Any other solution?

2

What Tool did You use the create the Bootstick? Did You checked the Checksum of the Ubuntu ISO?

3

I used Balena etcher and also the internal Imagewriter an yes, i checked the Checksum and it matched.

4

Etcher can be a bit ... meh. If you have a windows Machine, I can recommend Rufus. There You can actively choose between GPT or MBR for UEFI BIOS or Legacy BIOS.

On Linux the only Program I know what offers that would be Ventoy. If You know that Your BIOS is in UEFI Mode, I could also recommend Impression or the Fedora Media Writer.

Another Thing: Are Secure Boot and Fast Boot in BIOS disabled?

5

I used Rufus on Windows, Secure Boot and Fast Boot disabled, nothing happend.
I've tried this:
I installed ubuntu 24.04 next to Zorin OS as Dual Boot; after that i upgraded to 26.04 Beta.
The same result, but i could change during the Advanced Option the older Kernel from 24.04 (6.17.0-20-generic) and: tada, 26.04 still booting!!!
The new 7.0.0-10 Kernel in Ubuntu 26.04 is the root cause not booting on my machine because the cpuid=rdseed32 trouble.
Tomorrow i trie to install the last amd microcode package for 26.04 and check again the new kernel.

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6

The latest amd microcode package was already installed;
so i think i must wait for a new Biosor an optimized 7.0.0-X Kernel...

7

Something news,
Today i found a workaround under this Link:

MrGiantAxe wrote:

The issue circles back to yet another issue that plagues this machine. (GTR 9 Pro IOMMU bios options - Beelink Forum) , because we cannot control IOMMU from the bios, and something changed with kernel 6.19 and up with how IOMMU behaves by default.

After spending several more hours today testing all sorts of kernel paremeters I finally got Ubuntu 26.04 with Kernel 7.x to boot.

  1. boot up the ubuntu live iso
  2. Press e on the installer when Try or install ubuntu pops up
  3. Add iommu=pt after the quiet splash (or remove the quiet splash part if you want to debug the startup procedure.)
  4. Press ctrl + x or F10 to boot
  5. The iso starts working and boots fine.

Without the iommu=pt it seems the PCI-e controller complete crashes during startup causing the USB, Thunderbolt and NVME controller to stop working. Somehow the GTR9 has extreme trouble with the IOMMU implementation in this board because none of my other pcs have this (and they have that enabled as well.)

Now that i think of it, i did put iommu to pt on my current ubuntu installation to make unified system/vram working in linux. And since doing that over 3 months ago i also havent had any intel nic crashes. Im starting to wonder if the IOMMU stuff is somehow related to the nic crashes.

It worked for me! Meanwhile, a new kernel 7.0.0-12 is also being offered via the update, after which the 26.04 beta will also start cleanly after installation!

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