Hi all.

This problem is solved.
This is caused by BIOS BUG.
I updated the motherboard BIOS from 1.00 to 1.10, and then the problem is not occur.

ASRock ( and AMD ) tells “ Update AMD AGESA Combo-AM4 V2 1.0.8.0 Patch A”.

Thank you for many suggestion.

Hi all.

This problem is solved.
This is caused by BIOS BUG.
I updated the motherboard BIOS from 1.00 to 1.10, and then the problem is not occur.

ASRock ( and AMD ) tells “ Update AMD AGESA Combo-AM4 V2 1.0.8.0 Patch A”.

Thank you for many suggestion.

@tony said in XCPng 8.0 with Ryzen7 4750G(Renoir) suddenly reboot.:

@seirios are you able to make the server reboot if no VM is started? ie. ssh to dom0 and do whatever you were doing in the VM when the server reboot.

I didn’t test that. I will test it at day after tomorrow.

@tony said in XCPng 8.0 with Ryzen7 4750G(Renoir) suddenly reboot.:

@seirios said in XCPng 8.0 with Ryzen7 4750G(Renoir) suddenly reboot.:

And I think this plobrem causes by interrupt because it occures when I connect to VMs by ssh( from network).

Are you saying the server doesn't reboot if you don't connect to the VM by ssh? What about if you use console in XO instead of ssh? Can you make it reboot by doing a specific task?

I connect to GUEST VMs with ssh, and I connect to XCP-ng server(AKA dom0) with XCP-ng Center or ssh.
And I met this problem with any specific task.

And I will test GUEST VM's console with XCP-ng center.

Currently I only have the test environment with 1 PC, so I can put XO only on testing environment and if I do so, the XO can cause some different affects. This is the reason why I do not use XO on this environment.

@tony said in XCPng 8.0 with Ryzen7 4750G(Renoir) suddenly reboot.:

@seirios Does it restart when the VM is started but you are not actively using it? Does it reboot consistently by doing the same task?

This server and VMs condition is followings.

• Hypervidor and dom0 is not to connect to the internet.
• Thise VM is not connect to the Internet
  • These systems are all stand alone.
• The VMs start from dom0 command line( xe start-vm ...)
• The system is not restart that I do not operate the VMs.

And I think this plobrem causes by interrupt because it occures when I connect to VMs by ssh( from network).

@gn_ro said in XCPng 8.0 with Ryzen7 4750G(Renoir) suddenly reboot.:

The restart occurs only for the hypervisor, or the whole system (i.e.: starts from post)?

Restart whole system. This problem cause reboot the server.

@tony @speedy01

I configured BIOS and all ACPI/Powersave/c-state is disabled, but the problem occurs.

Do all the VMs restart at the same time?

No. I start that VMs by hand.

@tony said in XCPng 8.0 with Ryzen7 4750G(Renoir) suddenly reboot.:

@seirios How frequent are the restarts? Try what speedy01 said or may be try XCP-ng 8.1 and see if it helps.

Thanks. I will test the speedy01 configuration.

This restart trouble occur frequently about 10 to 30 minutes after start the guest VMs.

@speedy01 said in XCPng 8.0 with Ryzen7 4750G(Renoir) suddenly reboot.:

try disabling all the powersave/c-state mode in bios. I had this issue with ryzen based cpu, and it resolved my random reboot issues.

https://xcp-ng.org/forum/topic/350/amd-epyc-compatible/41

Thank you for inform me.

I will read the thread and set to disable apm/c-state.

And I will report the result whether plobrem will solved or not.

@tony said in XCPng 8.0 with Ryzen7 4750G(Renoir) suddenly reboot.:

Have you tried using remote syslog to capture any errors before reboot? Is the system stable with other OS (without XCP-ng)?

This system is stand alone, so I did not place syslog server.
This PC runs stable with FreeBSD(5day), Debian(over 1day), and memtest86 paased 3 loops.

XCP-ng 8.0 with Ryzen7 4750G is troubled.
The XCP-ng server(Hypervisor) suddenly reboots without error messages.
This problems happen at random like

• iperf traffic test running on FreeBSD VM.
• Editing file running on FreeBSD/Debian VM.
• Doing nothing.
  Are there any information of this problem? And any suggentions, or what can I do?

Environment:
CPU: AMD Ryzen7 4750G (Renoir APU)
MB: ASRok B550M-ITX/AC
Mem: DDR4-3200 8GBx2
PCI Card: Intel X710 10GB 4port NIC
Guest VM: FreeBSD 12.1-RELEASE VM x2, XO, CentOS7

Additional Information.

These VMs running on Ryzen7 3700X/ASRock X570-Taichi, Memory:64G, PCI Card: Intel X520 10GB 4port NIC environment, Hypervisor and Guest VM running with no errors.