Hi,

  Old Shell was installing EFI_SHELL_INTERFACE and new shell is installing the 
EFI_SHELL_PARAMETERS_PROTOCOL on the shell application. 

Thanks,
Ramesh

-----Original Message-----
From: edk2-devel [mailto:[email protected]] On Behalf Of GN 
Keshava
Sent: 23 May 2017 17:01
To: [email protected]
Subject: [edk2] UEFI shell vs UEFI BIOS version compatibility

Hi all,

I was using older version of UEFI shell (older EFI shell inside 
EdkShellBinPkg). It was working fine with my testing PCs (Intel core i5 (Dell 
Optiplex 7020) (UEFI ver 2.31) as well as Intel Gigabit motherboard (UEFI ver 
2.4)). I'm able to load any driver efi and use it.

Now I'm trying newer UEFI shell (UEFI Interactive shell v 2.2, the newer one in 
ShellBinPkg).
I'm trying to load my driver (and default Fat.efi driver downloaded from github 
as well) It is working fine with Intel Gigabit motherboard (UEFI ver 2.4). I'm 
able to load the driver and use it.
But if I try to load the same efi driver on newer UEFI shell v2.2 on Intel core 
i5 (Dell Optiplex 7020) (UEFI ver 2.31), display is just turning black, and I'm 
not able to use the shell any further. (But I'm able to load my custom shell 
application!)

What could be the issue? Any help is much appreciated.

Thanks.
With regards,
Keshava
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