Learn how to fix the “AER: Error of this Agent is Reported First” in Proxmox. Our Proxmox Support team is here to help you with your questions and concerns.
How to Fix “AER: Error of this Agent is Reported First” in Proxmox
The “AER: Error of this Agent is reported first” message is an Advanced Error Reporting notification associated with PCI device errors in Proxmox. It is usually caused by hardware or driver issues. This error can lead to system instability, performance degradation, and communication problems between PCIe devices.
A standard error message looks like this:
nvme 0000:01:00.0: AER: Error of this Agent is reported first
Here, 0000:01:00.0 identifies the specific PCI device location, and nvme indicates the error is related to an NVMe storage device.
Impacts of the Error
- System instability and unexpected crashes.
- Performance degradation of PCIe devices.
- Interference in PCIe device communication.
- Possible device malfunctions or reduced reliability.
- Intermittent connectivity issues.
- NVMe drive communication failures.
- PCI passthrough errors affecting virtual machines.
- Repeated error logging consuming system resources.
Potential Causes and Fixes
1. Hardware Compatibility Issues
Faulty or incompatible hardware components.
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- Update motherboard firmware to the latest version
- Download the latest firmware from the manufacturer’s website.
- Then, create a bootable USB for firmware updates.
- Disable Secure Boot in BIOS before updating.
- Finally, restart and verify the update.
- Check Proxmox Hardware Compatibility List (HCL) to verify support.
- Verify CPU architecture and RAM compatibility.
- Ensure the motherboard chipset supports PCI devices used in Proxmox.
- Reseat PCI devices to ensure proper connectivity.
- Power down the system completely.
- Remove and reseat PCIe devices.
- Clean PCIe contacts using isopropyl alcohol.
- Check for physical damage or oxidation.
2. Outdated Kernel Drivers
Obsolete or incompatible network/storage drivers.
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- Upgrade to the latest Linux kernel.
- Then, install the latest Intel/AMD network drivers.
- Test new kernel versions (e.g., Kernel 6.8).
- Download and manually install latest drivers from vendor websites.
Here is a comprehensive driver update strategy:
- Linux Kernel Update
apt update && apt upgradeThen, select the recommended kernel version and verify kernel compatibility with Proxmox.
- Network Driver Installation
First, identify the network adapter model. Then, download drivers from the official manufacturer’s website. Also, use Linux package managers for installation.
3. PCI Bus Configuration Problems
Incorrect PCI bus settings in BIOS/UEFI.
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- Systematic Configuration Resolution
- Modify BIOS/UEFI Settings
- Then, go to the PCIe configuration section.
- Adjust slot configurations or reset to defaults.
- Disable PCIe Power Management
- Disable PCIe power-saving features.
- Modify kernel boot parameters.
- Reset PCI Device Configurations
- Use `lspci` to identify problematic devices.
- Rebuild device kernel modules.
4. NVMe Device Errors
NVMe storage device communication failures.
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- NVMe Diagnostics Process
- Check SMART Data
smartctl -a /dev/nvme0 - Check NVMe Device Status
nvme list - 3. Update NVMe Firmware
- Download the official firmware.
- Use the manufacturer’s update utility.
- Check SMART Data
5. Network Driver Instability
Faulty network interface drivers.
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- Disable Offloading Features
ethtool -K eth0 tso off gso off gro off - Next, identify the network adapter model. Then, download and install drivers manually.
- Then, add a secondary network interface. Use Linux network bonding for failover.
6. System Configuration Conflicts
Misconfigured system settings or kernel modules.
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Configuration Optimization Steps
- Analyze System Logs
journalctl -xe | grep AER - Disable Unnecessary Kernel Modules
lsmod | grep pcie
modprobe -r pcie_module_name
- Perform Clean Proxmox Installation
- Backup system configuration.
- Reinstall Proxmox cleanly.
- Migrate configurations incrementally.
Prevention Strategies
- Keep Proxmox and Linux kernel updated.
- Maintain current firmware versions.
- Apply security patches promptly.
- Use monitoring tools to track system health.
- Regularly check system logs.
- Perform periodic hardware diagnostics.
- Use multiple network interfaces.
- Implement RAID for storage.
- Configure failover mechanisms.
- Validate hardware compatibility before deployment.
- Perform burn-in tests for new hardware.
- Use enterprise-grade components for stability.
[Need assistance with a different issue? Our team is available 24/7.]
Conclusion
The “AER: Error of this Agent is reported first” message is a critical indicator of PCI device errors in Proxmox.
In brief, our Support Experts demonstrated how to fix the “AER: Error of this Agent is Reported First” in Proxmox.
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