5
1
I have a few XenServer VMs all running CentOS 5.5. Some are 32-bit and others are 64-bit.
Every time they boot, the following message appears:
Applying Intel CPU microcode update: [FAILED]
Does anyone know why this is happening and how I can fix it?
Reado
Posted 2011-04-02T21:20:40.033
Reputation: 421
5
This probably happens because the OS is running inside a VM and therefore can't apply CPU microcode updates. As for how to fix it, I have no idea. Does this message prevent any meaningful work or does it merely disturb you? In the latter case you can safely ignore it.
Marcus
Posted 2011-04-02T21:20:40.033
Reputation: 427
4
If you want to prevent the Intel CPU microcode from starting at boot, you can disable it as follows: (Run the command as root)
# chkconfig microcode_ctl off
This will prevent the microcode service from trying to apply the update at boot, since it will fail on your VMs every time.
Von Landfried
Posted 2011-04-02T21:20:40.033
Reputation: 376
3
On a CentOS 6 installation, microcode_ctl doesn't seem to be invoked via the /etc/init.d (chkconfig) mechanism any more. I achieved the same effect by uninstalling the package:
# rpm --erase microcode_ctl
(I know the original question was centOS 5.5, but a search brought me here...)
Ed Randall
Posted 2011-04-02T21:20:40.033
Reputation: 140
"As the virtual machine is running on virtual CPUs there is no point updating the microcode. Disabling the microcode update for your virtual machines will stop this error: " https://www.centos.org/docs/5/html/5.2/Virtualization/sect-Virtualization-Troubleshooting-Microcode_error_during_guest_boot.html
– phuclv – 2015-07-01T04:43:13.730This sounds very sensible, a virtual machine should neither need nor be able to apply microcode updates as that (I would have thought) should be handled by the host. – Mokubai – 2011-04-02T21:39:56.020