[Solved] Unable to install RHEL9 on VirtualBox

[Fujitsu_user]

Whenever to start it, it will almost immediately panic:

RHEL9.png (36.87 KiB) Viewed 10131 times

Please see the attached logs and the screen copy.
Thanks.

[scottgus1]

There was no log, but the green turtle is present, so Hyper-V is enabled. See HMR3Init: Attempting fall back to NEM (Hyper-V is active)

[fth0]

If you haven't already eliminated Hyper-V, please try if the following command helps:

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VBoxManage setextradata "RHEL9" "VBoxInternal/CFGM/IsaExts/POPCNT" "1"

[/s]
Edit:
Damn it, that happens when you type instead of copy!

Please try the following command instead:

Code: Select all

VBoxManage setextradata "RHEL9" "VBoxInternal/CPUM/IsaExts/POPCNT" "1"

If it does not help, and only then, additionally try:

Code: Select all

VBoxManage setextradata "RHEL9" "VBoxInternal/CPUM/IsaExts/POPCNT" "2"

[Fujitsu_user]

Just clarify: as after I turned off the Hyper-V in Windows 11's setting and rebooted the machine, tried to install RHEL9, still same problem, so I re-enabled the Hyper-V.
Just tried your VBoxMange command, but still, the RHEL9 will almost immediately panic. I tried to add the logs, now I found it said the log file too big, max allowed size is only 128Kib, but my log files are all bigger than that, let me know how should I send the log files over.

[mpack]

I deleted your pasted, partial logs.

Please provide a VM log file. Make sure the VM is fully shut down, then right click it in the manager UI. Select "Show Log" and save "VBox.log" (no other file) to a zip file. Then attach the zip here.

I would say to look for the "Upload attachment" tab when composing a message, but you already posted a screenshot so you must already know about it.

[Fujitsu_user]

Ok, please see the attached zipped log file

[fth0]

Sorry, I made a mistake.

Please see my previous post for the correct command.

[Fujitsu_user]

The
VBoxManage setextradata "RHEL9" "VBoxInternal/CPUM/IsaExts/POPCNT" "1"
fixed the issue. Thanks a lot!!!

[fth0]

Thanks for reporting back!

[Fujitsu_user]

Thanks for reporting back!

Hi fth0, may I know what does the command VBoxManage setextradata "RHEL9" "VBoxInternal/CPUM/IsaExts/POPCNT" "1" do? as I found now the svm flag in /proc/cpuinfo is gone on all my Linux VMs, could not get KVM support for qemu. If that's the cause, how to restore it to its original state? Thanks a lot.

[fth0]

VirtualBox 6.1.36 does not to provide the CPU capability POPCNT to the guest OS when running in NEM mode (under Hyper-V). The given extradata setting overrides this decision. Leave out only the digit '1' (but keep the then empty quotes "") to remove the extradata setting.

I don't see any connection to the SVM flag, but let's discuss that in your other thread.