DMA error on NIC card

  • We are getting occasionally the following error (Pfsense 2.2.5-RELEASE (amd64) )

    alc0: DMA read error - resetting
    alc0 : could not disable RxQ/TxQ ( 0x00000008)
    alc0: could not disable Rx/Tx Mac (0x00000008)

    What does this error indicate and is it critical and how can we fix it?



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