Would you tell us the cable manufacturer name, part and model numbers, and the length?
Also, depending on the cables, the next driver update improves cable compatiblity with some cables, so the driver update might help you. Watch for the version 17.1 webpacks. I expect that version to be available in Download Center within the next few weeks.
The cables we have here are from Intellinet(tm) network solutions (www.intellinet-network.com):
INT SFP+ Cable Blk 3m, EAN: 766623750370
I'm very sorry, I cannot find the cables on their website anymore - maybe they've taken them out of stock...
If I can assist you somehow (ask a driver about parameters etc.) please let me know. I'd send in two of them cables if you'd like (well, It'd be great if the destination would be somewhere in the EU... If not, it's probably better to let Intellinet send some cables to your lab...
Question: in which version of the linux kernel driver can we find the "update"?
The updated Linux drivers are available now at:
I cannot test your specific cable model and cannot tell why the cable is failing. If the driver update does not help, then you will need a different cable.
Cables that do not identify themselves as SFP or SFP+ are blocked. If your cable is missing this identification in the EEPROM, then the cable will not work even with a driver update. I have seen this happen on some cables in the past, but I do not know about the brand and model you have.
You may find it useful to have at least one Intel branded cable available for troubleshooting compatibility issues. You can find more information on the cables at http://www.intel.com/support/network/adapter/pro100/sb/CS-030612.htm.
after round about 10 months and a few 1000 euros spent, I can now confirm, that the issue with the HP E3500yl switch, the HP 15m DA cable and the x520-DA2 is now fixed by the new driver. Thanks a lot and please continue to analyze and fix problems ....