PXE-UEFI Boot / NUC6CAY: POST-Message

[FAugu1]

Hello

We noticed the following problem with NUC-6Gen devices (NUC6CAY):

At startup, the device stays in the POST phase with the message "BIOS has detected unsuccessful POST attempt (s) ..."

This happens when:

        a. a network cable is connected, but on the same network no DHCP server is available.

        b. the BIOS option "UEFI PXE & iSCSI" is active.

In this configuration, the device takes also a long time to display the BIOS menu (with the F2 key).

Our previous tests have shown:

o Without a network cable, the device starts.

o The device starts with cable and DHCP server.

o After disabling "UEFI PXE & iSCSI" in the BIOS, the device starts normally, but not always.

o As soon as the device has received DHCP information, the problem has disappeared, although "PXE" is still active and the device is put back into a network without DHCP server.

o A BIOS update doesn't solve the problem.

The difficulty is that there is no DHCP server available where we install the NUCs, and if the problem is solved, the problem cannot be reproduced.

Thank you in advance for your help.

[n_scott_pearson]

Yea, this issue has been reported before and reproduced by technical support. A sighting has been opened. Watch for a BIOS update that addresses this issue.

[FAugu1]

​Thanks a lot for your answer!

In the meantime (not too long i hope), do you know a workaround?

[n_scott_pearson]

Are you actually using PXE boot? If not, disable this feature completely in the BIOS:

1. During POST, immediately upon seeing the BIOS Splash Screen appear, use the F2 key to get into BIOS Setup (the Visual BIOS program).
2. Click on Advanced and then Boot and then the Boot Configuration tab.
3. In the lower left window, titled Boot Devices, set parameter Network Boot to Disabled.
4. Use the F10 key or the "X" box in the upper right-hand corner of the screen to save the configuration and exit Visual BIOS.

This should avoid the issue you are having,

...S

[Chris_V_Intel]

As Scott has noted, this issue has been reported and I've opened a bug sighting against it.

There's currently no fix, however there's a couple ways to mitigate it until we do have a fix.

1. Don't update past BIOS AY0056. Of course, it may be too late by now.
2. If you can, turn off UEFI in the BIOS. That may also be an issue because many people install their OS via UEFI.
3. Give the Intel NUC a MAC address. This issue only seems to happen when DHCP is turned OFF in the router.

We are looking into a permanent fix and as soon as I know more, I will post here.

[FAugu1]

Hello

We already updated the BIOS and we need UEFI on PXE. We will try to give the NUC a MAC and wait for a permanent fix.

Thanks a lot for the information!

Regards

[DAsdf4]

I just had the same issue after upgrading to the latest BIOS (0065) from a really old version.

This is strange because the release notes state that this problem is fixed.

Seems like this isn't the case!

Disabling PXE fixed it for me but it's just luck that I don't rely on that!

Please have a look into it again.

[Chris_V_Intel]

Hi @DAsdf4​ ,

Thank you for letting us know about this. Yes, it was supposed to be fixed, but obviously it isn't.

What's interesting is that when I tested BIOS 0065, it worked for me. Then I saw this post and now it keeps failing for me too! So weird!

I have let the team know and they are looking into this.

I'll respond here when I know more.

[DAsdf4]

Thanks for confirming!

[Chris_V_Intel]

I am VERY sorry that is has taken this long and I have bad news.

The issue will not be fixed.