I coded up the quirk to see what it looks like. First patch is the quirk itself, and the second one is a slightly rejiggered version of the dumping code for testing. Jacobo, can you check if this fixes the efi stub boot? Thanks. Arvind Sankar (2): efi/x86: Add a quirk to support command line arguments on Dell EFI firmware efi/libstub: Dump command line before/after conversion .../firmware/efi/libstub/efi-stub-helper.c | 139 +++++++++++++++++- drivers/firmware/efi/libstub/efistub.h | 31 ++++ drivers/firmware/efi/libstub/file.c | 5 +- 3 files changed, 173 insertions(+), 2 deletions(-) -- 2.26.2