Problem with e1000: EEPROM Checksum Is Not Valid

From ThinkWiki
Revision as of 16:50, 21 July 2006 by Sofar (Talk | contribs) (→‎Circumvention)
Jump to: navigation, search

Problem Description

On certain ThinkPads, e1000 driver for Intel Gigabit controller fails to load with the following error message in /var/log/messages: 

e1000: 0000:02:00.0: e1000_probe: The EEPROM Checksum Is Not Valid
e1000: probe of 0000:02:00.0 failed with error -5

Circumvention

  • Upgrade your BIOS

Lenovo has published newer BIOS revisions that appear to fix the issue for some users. The BIOS upgrade turns off "Deep smart power down" which has been known to cause issues at initialization time (the driver can re-enable the issue later if you desire, the feature works correctly then).

  • Insert a cable

Inserting a linked network cable bypasses the problem.

  • Dangerous: turn off checksum checking in the driver

Disabling the checksum checking is dangerous: the network card has (obviously) read incorrect data from the EEPROM and will start operation based on these wrong values. You will see degraded network performance and possible data corruption and driver crashes. DO THIS AT YOUR OWN RISK.

In e1000_main.c, find the following code and comment out err assignment and the goto statement: 

/* make sure the EEPROM is good */
if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
        DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
        /* err = -EIO;
        goto err_eeprom; */
}

Note: This is just a temporary solution until a better fix is developed. See the bug report for more information.

See also

Retrieved from "https://www.thinkwiki.org/w/index.php?title=Problem_with_e1000:_EEPROM_Checksum_Is_Not_Valid&oldid=23419"