(UEFI) Dell XPS 15z L511z modded BIOS

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(UEFI) Dell XPS 15z L511z modded BIOS - and HOWTO

Posts: 472
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Joined: Sep 2012
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TimeWalker Offline

BIOS Guru

#1,289

02-05-2013, 07:37 AM (This post was last modified: 02-05-2013, 08:34 AM by TimeWalker.)

Nothing really new there besides the idea of swapping ePsa for shell, which is somewhat useful. The uefi unlocked from factory and enabled BIOS for xps17 is a private case, which allows the user of a given model to launch uefi stuff from recovery capsule, for us this is not the case. In a retrospective there a clue to setting uefi mode as always enabled in the a19 BIOS of xps17. Comparing old and new versions of the setup advanced module can lead us to a byte that needs flipped. Regarding the flasher from the capsule - I had it launched from shell before, but there is virtually no point in this for us because uefi is disabled as an option and as you mention it, setting it enabled will unload capsule from memory.

@kasar
try swapping:
00 5B 0D 00 00 00 00 00 00 00 00 00 00 00 5B 0D 01 00 00 00
with
00 5B 0D 00 00 00 01 00 00 00 00 00 00 00 5B 0D 01 00 00 01
in PlatformSetupAdvanced to see if this sets UEFI boot as enabled by default ...
I won't be around my laptop till tomorrow evening.