Hi
Reading here it would seems so;
http://blog.fpmurphy.com/2012/12/efivars-and-efivarfs.html
I built the efivars package in my TESTING repo;
Using the -u switch on openSUSE 13.2 I see;
uefivars -u
AcpiGlobalVariable (NV,BS,RT): UNKNOWN
AuthVarKeyDatabase (NV,BS,RT): UNKNOWN
Boot0000 (NV,BS,RT):* Windows Boot Manager HD(2,96800,82000,8aab4d75-f8ce-4691-b094-57bf2f3f20ce)File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...0................
Boot0001 (NV,BS,RT):* opensuse-secureboot HD(2,96800,82000,8aab4d75-f8ce-4691-b094-57bf2f3f20ce)File(\EFI\opensuse\shim.efi)
BootCurrent (BS,RT): 0000
BootNext (NV,BS,RT): 0001
ConIn (BS,RT):
/ACPI(a0341d0,0)/PCI(0,1f)/ACPI(30341d0,0)
ConInDev (BS,RT):
/ACPI(a0341d0,0)/PCI(0,1f)/ACPI(30341d0,0)
ConOut (BS,RT):
/ACPI(a0341d0,0)/PCI(0,2)
ConOutDev (BS,RT):
/ACPI(a0341d0,0)/PCI(0,2)
/ACPI(a0341d0,0)/PCI(0,2)/UnknownACPI(3)
CustomBPath (NV,BS,RT): UNKNOWN
EnableTurboOnDC (NV,BS,RT): UNKNOWN
ErrOutDev (BS,RT):
/ACPI(a0341d0,0)/PCI(0,2)/UnknownACPI(3)
GTTMMADRVar1 (NV,BS,RT): UNKNOWN
GTTMMADRVar2 (NV,BS,RT): UNKNOWN
KbcVersion (BS,RT): UNKNOWN
Lang (NV,BS,RT): eng
LangCodes (BS,RT): eng,fra,deu,spa,ita,dan,nld,fin,jpn,nor,por,swe,zho,zho
MemoryOverwriteRequestControl (NV,BS,RT): UNKNOWN
OsIndicationsSupported (BS,RT): UNKNOWN
PBRDevicePath (NV,BS,RT): UNKNOWN
PchInit (NV,BS,RT): UNKNOWN
PchS3Peim (BS,RT): UNKNOWN
PlatformLang (NV,BS,RT): en-US
PlatformLangCodes (BS,RT): en-US,fr-FR,de-DE,es-ES,it-IT,da-DA,nl-BE,fi-FI,ja-JA,no-NO,pt-PT,sv-SV,zh-CN,zh-TW
SaPegData (NV,BS,RT): UNKNOWN
SecureBoot (BS,RT): UNKNOWN
SetupMode (NV,BS,RT): UNKNOWN
SignatureSupport (BS,RT): UNKNOWN
SysDiagsBiosData2010 (NV,BS,RT): UNKNOWN
Timeout (NV,BS,RT): 0 secs
VPROState (NV,BS,RT): UNKNOWN
WmiDataSize (NV,BS,RT): UNKNOWN
dbx (NV,BS,RT): UNKNOWN
use_openSUSE_cert (BS,RT): UNKNOWN
I would guess the code needs updating for all the unknowns…