https://www.thinkwiki.org/w/api.php?action=feedcontributions&feedformat=atom&user=SwenteThinkWiki - User contributions [en]2026-05-13T01:54:21ZUser contributionsMediaWiki 1.31.12https://www.thinkwiki.org/w/index.php?title=Problem_with_e1000:_EEPROM_Checksum_Is_Not_Valid&diff=26931Problem with e1000: EEPROM Checksum Is Not Valid2006-12-09T23:55:55Z<p>Swente: /* Circumvention */</p>
<hr />
<div>== Problem Description ==<br />
On certain ThinkPads, [[e1000]] driver for [[Ethernet_Controllers#Intel_Gigabit_.2810.2F100.2F1000.29|Intel Gigabit controller]] fails to load with the following error message in /var/log/messages:<br />
<br />
<pre><br />
e1000: 0000:02:00.0: e1000_probe: The EEPROM Checksum Is Not Valid<br />
e1000: probe of 0000:02:00.0 failed with error -5 <br />
</pre><br />
<br />
== Circumvention ==<br />
<br />
* Upgrade your BIOS<br />
<br />
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).<br />
<br />
* Insert a cable<br />
<br />
Inserting a linked network cable bypasses the problem.<br />
<br />
* Take the checksum twice<br />
<br />
This [http://sourceforge.net/tracker/index.php?func=detail&aid=1474679&group_id=42302&atid=447449 bug report] describes a fix -- take the checksum twice. First time will report a bad checksum, second will work (the problem seems to be triggered by some power-saving technology). This requires a tweak to the driver source and a rebuild of your kernel. This is much better than a previous "fix" published here that disabled checksum checking entirely.<br />
<br />
* Remove/add kernel module<br />
<br />
Removing and adding the kernel module is a possible work-around. As root, run<br />
<br />
<pre><br />
# modprobe -r e1000<br />
# modprobe e1000<br />
</pre><br />
<br />
On some occasions, the commands have to be run twice before eth0 becomes useable.<br />
On some X60s this will not work at all.<br />
<br />
* Disabling and re-enabling the NIC in the BIOS<br />
<br />
For some it fixed the issue finally, for some it helped just temporarily.<br />
<br />
== See also ==<br />
<br />
* [http://sourceforge.net/tracker/index.php?func=detail&aid=1474679&group_id=42302&atid=447449 bug report] submitted for e1000 driver.<br />
* Discussion at [http://forums.gentoo.org/viewtopic-t-476305-highlight-e1000.html Gentoo forums]</div>Swente