PCIe Bus Error

PCIe devices may stop working over time or work with intermittent issues. For example, DVB adapters may show CC errors and signal re-tuning, while Ethernet adapters may lose link or drop packets. These malfunction signs can be reflected as the following error in the dmesg:

pcieport 0000:00:1c.3: PCIe Bus Error: severity=Corrected, type=Physical Laye

Typically, this error occurs as a result of the system’s Active-State Power Management (ASPM) attempting to reduce power supply to the PCIe port.

Disable ASPM

On the servers we recommend to disable power management.

Open file /etc/default/grub in any text editor and find the line started with:

GRUB_CMDLINE_LINUX_DEFAULT=

add the parameter pcie_aspm=off:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=off"

Save the file and apply the changes:

sudo update-grub

Restart your server.