[syslinux] syslinux.efi and vendor-class-identifier

[James Pearson]

Ady Ady via Syslinux wrote:
> 
>> However, I have just tested the exact same boot procedure using a Dell
>> laptop (Latitude 7480) - and it all worked without a problem - that is,
>> syslinux.efi and ldlinux.e64 were downloaded without a problem - and
>> from a tcpdump, there was *no* DHCP transaction between downloading
>> syslinux.efi and ldlinux.e64
>>
>> So I'm puzzled as to why it doesn't work on the Dell 3930 - may be a
>> firmware bug/feature (it is running the latest firmware) ?
> 
> 
> Reminder: syslinux.efi 6.04-pre1 does not support Secure Boot. Secure
> Boot needs to be set "off".

Secure boot is off

> Please also note that the behavior of this Dell 3930 system might vary,
> depending on the firmware's options; see below.
> 
>  From the manual for the Dell 3930 system:
> 
> 
> Network adapter:
> Integrated Intel 10/100/1000 Mb/s Ethernet (RJ45)
> Integrated Aquantia 10 GB/s Ethernet (RJ45)
> 
> 
> Integrated NIC:
> Allows you to control the onboard LAN controller. The option ‘Enable
> UEFI Network Stack’ is not selected by default. The options are:
> * Disabled
> * Enabled
> * Enabled w/PXE (default)
> 
> 
> Integrated NIC2:
> Allows you to control the onboard LAN controller. The option ‘Enable
> UEFI Network Stack’ is not selected by default. The options are:
> * Disabled
> * Enabled (default)
> * Enabled w/PXE
> 
> 
> UEFI Network Stack
> Allows pre-OS and early OS networking features to use any enabled NICs.
> This may be used without PXE turned on.
> * Enable UEFI Network Stack
> * Default - (Disabled)
> 
> 
> So, maybe these "BIOS" options (among others) might need to be changed
> for syslinux.efi to work correctly with this system/NIC(s).

I've tried virtually every combination of the set up options for the 
NICs ... including disabling one of the NICs so the system only sees one 
NIC i.e. at least one NIC needs to be enabled with PXE and the UEFI 
Network Stack enabled

But nothing improves the situation

> Perhaps a PXE boot in CSM mode, using pxelinux.0 + ldlinux.c32 from the
> same 6.04-pre1 version would show a different behavior in this same
> system.

You can set up the system to PXE boot in legacy BIOS mode (which I'm 
guessing is CSM mode?) - and I _can_ install CentOS 7 via pxelinux.0 etc 
(we're using the pxelinux.0 supplied in the syslinux RPM that comes with 
CentOS - which I think is v4 ?) - however, as the Dell 3930 does not 
support booting from internal devices in legacy BIOS mode, it is 
impossible to then boot the installed system :-)

i.e. the reason I'm going down the EFI route

Thanks

James Pearson