View a step-by-step screencast of this process:
A few customers have been affected by a firmware bug that can cause instability when using Intel’s C-State power-saving functionality. If you are still experiencing instability after verifying that your server is at the most recent recommended BIOS and firmware levels, you may disable C-States using two methods:
BIOS:
- Reboot the server
- Press F2 to enter the BIOS configuration menu
- Select Processor Settings
- Scroll down to “C States” and “C1E”
- Use the arrow keys to set both to Disabled
- Press ESC repeatedly and select “Save changes and exit”
OpenManage:
- Launch the OpenManage web interface (https://IP_ADDRESS:1311/)
- Log in using your root username and password
- Select Main System Chassis -> BIOS -> Setup tab
- Select “Processor C State Control”
- Select the “Disabled” radio button -> Apply -> “Go Back to BIOS Setup Page”
- Repeat for “Processor C1-E”
- Reboot the server to apply the settings change