Groups > linux.debian.bugs.dist > #1090329

Bug#1004126: memtest86+.iso does not boot from USB

From	Michael Prokop <mika@debian.org>
Newsgroups	linux.debian.bugs.dist
Subject	Bug#1004126: memtest86+.iso does not boot from USB
Date	2022-01-21 15:10 +0100
Message-ID	<DI2M1-7lb-3@gated-at.bofh.it> (permalink)
References	(1 earlier) <DI2sF-6Zt-1@gated-at.bofh.it> <DI0TT-6e8-1@gated-at.bofh.it> <DI2Cm-72G-5@gated-at.bofh.it> <DI0TT-6e8-1@gated-at.bofh.it> <DI2Cm-72G-5@gated-at.bofh.it>
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* Marc Haber [Fri Jan 21, 2022 at 02:41:03PM +0100]:
> On Fri, Jan 21, 2022 at 02:33:44PM +0100, Michael Prokop wrote:
> > * Marc Haber [Fri Jan 21, 2022 at 01:03:13PM +0100]:

> > > I tried dd'ing the memtest86+.iso to two differen USB sticks. Both don't
> > > boot on two different older ThinkPad Notebooks (one T520 and one X121e)
> > > - the systems just fall back to the Boot Menu. The Free-as-in-Beer
> > > memtest.iso from memtest86.com works fine on both boxes.

> > I suppose your system runs with EFI, while memtest86+ needs 16-bit
> > boot and doesn't work with EFI systems, AFAIK.

> memtest86+.elf on the same system runs fine if booted from an USB stick
> with grub-pc (not grub-efi). Is that a possible indication that the
> system doesn't run with EFI? I'd like to keep it running until tomorrow.

If you have /sys/firmware/efi on your running Debian system (with
either efivars or efivarfs kernel module loaded), then you're
running in EFI mode.

grub-pc doesn't do EFI boot, so I'd assume your system was booted in
legacy/compatibility mode then?

regards
-mika-

Thread

Bug#1004126: memtest86+.iso does not boot from USB Marc Haber <mh+debian-packages@zugschlus.de> - 2022-01-21 13:10 +0100
  Bug#1004126: memtest86+.iso does not boot from USB Marc Haber <mh+debian-packages@zugschlus.de> - 2022-01-21 15:00 +0100
    Bug#1004126: memtest86+.iso does not boot from USB Michael Prokop <mika@debian.org> - 2022-01-21 15:10 +0100
      Bug#1004126: memtest86+.iso does not boot from USB Marc Haber <mh+debian-packages@zugschlus.de> - 2022-01-21 19:30 +0100
        Bug#1004126: memtest86+.iso does not boot from USB Marc Haber <mh+debian-bugs@zugschlus.de> - 2022-01-22 14:40 +0100
  Bug#1004126: memtest86+.iso does not boot from USB Michael Prokop <mika@debian.org> - 2022-01-21 15:00 +0100
  Bug#1004126: memtest86+.iso does not boot from USB Fabio Fantoni <fantonifabio@tiscali.it> - 2022-01-21 20:00 +0100
    Bug#1004126: memtest86+.iso does not boot from USB Fabio Fantoni <fantonifabio@tiscali.it> - 2022-01-22 12:10 +0100
      Bug#1004126: memtest86+.iso does not boot from USB Fabio Fantoni <fantonifabio@tiscali.it> - 2022-01-22 18:20 +0100

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