wow it works!!!!
I asked ChatGPT what does it mean it says:
In the GRUB configuration file for Proxmox, the parameter pcie_port_pm=off is a kernel boot option that controls the power management behavior of PCIe ports. Specifically, this setting disables the power management feature for PCIe ports.
What This Parameter Does:
- PCIe Port Power Management: Normally, PCIe devices can enter low-power modes when idle through power management, reducing power consumption, which is especially useful in mobile devices or energy-efficient servers.
- Disabling Power Management: By adding pcie_port_pm=off to the GRUB configuration, you're instructing the Linux kernel not to automatically manage the power of PCIe ports. This results in the PCIe devices remaining fully powered and not transitioning into low-power states.
Why Use pcie_port_pm=off?
In some cases, PCIe device power management can lead to instability, particularly in certain hardware combinations or high-performance environments. For example:
- Incompatible Hardware: Some PCIe devices may not fully support power management, potentially causing them to malfunction or fail to recover from low-power states.
- Server Stability: In server environments, stability is often prioritized over energy savings, so disabling power management can reduce the chance of errors or unexpected behavior.
- Performance Needs: In scenarios where maximum performance is required from PCIe devices, avoiding low-power states is a reasonable choice to ensure optimal device performance.
Application in Proxmox:
Proxmox, as a virtualization platform, may host several PCIe devices like network cards, storage controllers, etc. Disabling power management prevents these devices from entering low-power modes, which could introduce latency or instability in virtualized environments.
This parameter is typically added to the GRUB_CMDLINE_LINUX_DEFAULT line in the /etc/default/grub file. After updating GRUB and rebooting the system, the setting takes effect.
Conclusion:
pcie_port_pm=off disables power management for PCIe ports during boot. In environments like servers or virtualization platforms (e.g., Proxmox), this can help improve stability and performance, especially if certain hardware is incompatible with power-saving features. However, it may result in slightly higher power consumption.
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