After some more searching, I did find two options in the UEFI: "TSME" (Description: "Transparent SME: AddrTweakEn = 1; ForceEncrEn =1; DataEncrEn = 0") "Data Scramble" (Description: "Data scrambling: DataScrambleEn. ")
Both can be set to Enabled/Disabled/Auto, with auto being the default. I tried all possible combinations: TSME=Auto, Scramble=Disabled -> black screen TSME=Auto, Scramble=Enabled -> black screen TSME=Auto, Scramble=Auto -> black screen TSME=Disabled, Scramble=Disabled -> black screen TSME=Disabled, Scramble=Enable -> black screen TSME=Disabled, Scramble=Auto -> black screen When I use any of TSME=Enabled, Scramble=Disabled TSME=Enabled, Scramble=Enabled TSME=Enabled, Scramble=Auto This leads to the kernel actually booting, but soon hanging with the following error: ata9: softreset failed (1st FIS failed) ata9: SATA link up 1.5Gbps (SStatus 113 SControl 300) ata9.00: qc timeout (cmd 0xa1) ata9.00: failed to IDENTIFY (I/O error, err_mask=0x4) ata9: SATA link up 1.5Gbps (SStatus 113 SControl 300) ata9: link online but 1 devices misclassified, retrying ata9: reset failed (errno=-11), retrying in 10 secs ata9: softreset failed (1st FIS failed) ata9: SATA link up 1.5Gbps (SStatus 113 SControl 300) ata9.00: qc timeout (cmd 0xa1) There is also a pink bar on the left side of the screen. I was able to get rid of that by using `module_blacklist=radeon`. (This did not help with the ata9 issue though) I tried all sata slots on the board to rule out any issues here. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879538 Title: System freeze when booting with mem_encrypt=on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879538/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
