[SOLVED] AER PCIe Bus Errors

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I came home to an error saying my log file was full. Turns out I have been receiving a stream of PCIe errors since I made some hardware changes over the weekend.


The first device that is throwing errors is one of two GPUs in the system. The errors look like:

Tower kernel: pcieport 0000:00:03.0: AER: Multiple Uncorrected (Non-Fatal) error received: 0000:01:00.0
Tower kernel: vfio-pci 0000:01:00.0: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, (Requester ID)
Tower kernel: vfio-pci 0000:01:00.0:   device [10de:1e84] error status/mask=00100000/00000000
Tower kernel: vfio-pci 0000:01:00.0:    [20] UnsupReq               (First)
Tower kernel: vfio-pci 0000:01:00.0: AER:   TLP Header: 40000001 00000003 000be7c0 f7f7f7f7
Tower kernel: pcieport 0000:00:03.0: AER: device recovery successful


The second device that is throwing errors is my LSI card. This is new. It is an LSI 9207-8i purchased from The Art of the Server on ebay. It is in a PCIe slot that was previously occupied by an NVME SSD in a PCIe adapter. Those errors look like:

Tower kernel: mpt3sas 0000:04:00.0: PCIe Bus Error: severity=Corrected, type=Physical Layer, (Receiver ID)
Tower kernel: pcieport 0000:00:03.0: AER: Multiple Uncorrected (Non-Fatal) error received: 0000:01:00.0
Tower kernel: mpt3sas 0000:04:00.0:   device [1000:0087] error status/mask=00000001/00002000
Tower kernel: mpt3sas 0000:04:00.0:    [ 0] RxErr 


Despite these errors, both devices are acting normally. The GPU is passed through to a VM and behaves as expected even under full load. The LSI card also appears fully functional. I went through an entire parity check which passed with zero errors. I am currently running through a drive rebuild (not because of drive failure, just swapping it out) and would rather not have to abort, but I also do not know how severe these errors are and if I need to take immediate action. 


I am attaching my full diagnostics dump.


Any advice would be much appreciated.


Thank you.


Edited by Team_Dango
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After doing some digging I believe I have solved my issue. It seems like it is somewhat a known bug on Asus X99 motherboards. Mine is an Asus X99-WS/IPMI. I am on the latest BIOS so updating was not an option.


The solution was to add "pcie_aspm=off" to my syslinux configuration. After a reboot I appear to no longer be getting errors. Fingers crossed it stays fixed. 


If anyone has anything to add feel free to chime in. If I don't have any errors tomorrow morning I'll mark this solved.

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  • Team_Dango changed the title to [SOLVED] AER PCIe Bus Errors

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