Several NIC's with the 82573 chipset display "TX unit hang" messages during normal operation with the linux e1000 driver. The issue appears both with TSO enabled and disabled, and is caused by a power management function that is enabled in the EEPROM. Early releases of the chipsets to vendors had the EEPROM bit that enabled the feature. After the issue was discovered newer adapters were released with the feature disabled in the EEPROM.
Text copy from the e1000 website:
82573(V/L/E) TX Unit Hang messages
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Several NIC's with the 82573 chipset display "TX unit hang" messages during normal operation with the linux e1000 driver. The issue appears both with TSO enabled and disabled, and is caused by a power management function that is enabled in the EEPROM. Early releases of the chipsets to vendors had the EEPROM bit that enabled the feature. After the issue was discovered newer adapters were released with the feature disabled in the EEPROM.
See : http:// e1000.sourcefor ge.net/ wiki/index. php/Issues# 82573.28V. 2FL.2FE. 29_TX_Unit_ Hang_messages 82573-dspd. sh in order to fix the problem !
Run the script fixeep-