EFI Network drivers being disabled when booting with Grub via PXE


gustavohenriquesm@...
 

Hello all,
I am facing an issue, if anyone can help me with this, I would appreciate a lot.
When I boot directly on Grub via USB drive then select UEFI Shell .efi (also in USB drive) to boot, the network drivers work fine, I can list them using drivers command as shown bellow (just some examples, not all network drivers are listed):

19E 0000000A D N N 1 0 Simple Network Protocol Driver Fv(AF4A9118-29A7-4F62-BB8C-E5B79013CB2E)/FvFile(A2F436EA-A127-4EF8-957C-8048606FF670)
1A3 0000000A B N N 2 11 IP4 Network Service Driver Fv(AF4A9118-29A7-4F62-BB8C-E5B79013CB2E)/FvFile(9FB1A1F3-3B71-4324-B39A-745CBB015FFF)
1AA 0000000A B N N 2 2 TCP Network Service Driver Fv(AF4A9118-29A7-4F62-BB8C-E5B79013CB2E)/FvFile(1A7E4468-2F55-4A56-903C-01265EB7622B)
1AC 0000000A B N N 8 1 UEFI PXE Base Code Driver Fv(AF4A9118-29A7-4F62-BB8C-E5B79013CB2E)/FvFile(B95E9FDA-26DE-48D2-8807-1F9107AC5E3A)

So, the problem isn't with Grub itself. The problem happens when I boot via PXE. The server sends the Grub .efi file, that is loaded with no problems, and then I boot the UEFI Shell. Then, all the network drivers seems to be disabled, take a look to drivers command:

19E 0000000A D N N 1 0 Simple Network Protocol Driver Fv(AF4A9118-29A7-4F62-BB8C-E5B79013CB2E)/FvFile(A2F436EA-A127-4EF8-957C-8048606FF670)
1A3 0000000A ? N N 0 0 IP4 Network Service Driver Fv(AF4A9118-29A7-4F62-BB8C-E5B79013CB2E)/FvFile(9FB1A1F3-3B71-4324-B39A-745CBB015FFF)
1AA 0000000A ? N N 0 0 TCP Network Service Driver Fv(AF4A9118-29A7-4F62-BB8C-E5B79013CB2E)/FvFile(1A7E4468-2F55-4A56-903C-01265EB7622B)
1AC 0000000A ? N N 0 0 UEFI PXE Base Code Driver Fv(AF4A9118-29A7-4F62-BB8C-E5B79013CB2E)/FvFile(B95E9FDA-26DE-48D2-8807-1F9107AC5E3A)

As you can see, except for the Simple Network Protocol Driver, all network drivers are shown as "?" type and no devices are managed by them (they look all disabled). I try to connect them using "connect -r" command, it does nothing. Tried also "reconnect" command, but it hangs forever with the prompt cursor blinking.
Do you know why it's happening and how I can bypass it?

PS.: Booting directly on UEFI Shell via PXE this issue does not reproduce, the drivers are ok, the problem is the combination PXE + Grub.

Thanks in advance!

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