Re: [Buildroot] Help with isolinux: "No DEFAULT or UI configuration directive found!"

Re: [Buildroot] Help with isolinux: "No DEFAULT or UI configuration directive found!"

[Andreas Ziegler]

Hello Sam,

On 2022-10-17 18:15, samuel ammonius wrote:
> Hello everybody,
> 
> I don't know anything about embedded systems or bootloaders or most of 
> the
> stuff involved with buildroot. I wanted to make an installer that could 
> be
> burned to a USB to run a graphical app that depends on Qt. I have the
> dependencies and filesystem all set up, but booting the generated 
> iso9660
> image gives me this message:
> 
> Booting from DVD/CD...
> 
> ISOLINUX 6.03  ETCD Copyright (C) 1994-2014 H. Peter Anvin et al
> 
> No DFEAULT or UI configuration directive found!

Check if you have a syslinux.cfg file where isolinux can find it. The 
root of the ISO image would be a possible location. This file contains 
the boot configuration:

  DEFAULT linux
   SAY Booting from DVD/CD...
  LABEL linux
   KERNEL bzImage
   APPEND quiet

See [1] for detailed information.

This config file is system specific and not supplied by Buildroot. It 
would be part of your BR2_ROOTFS_OVERLAY or generated from a 
BR2_ROOTFS_POST_BUILD_SCRIPT.

You may also need the ldlinux.c32 module (BR2_TARGET_SYSLINUX_C32).

> boot: _
> 
> 
> Typing anything into the "boot" prompt just repeats the same error 
> message.
> Does anyone know how this problem could be fixed?

Try entering 'KERNEL <image_name>' (relative to root of boot device) 
here.

> ---
> Thanks,
> Sam

Kind regards,
Andreas

[1] https://wiki.syslinux.org/wiki/index.php?title=Config
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[Buildroot] Help with isolinux: "No DEFAULT or UI configuration directive found!"

[samuel ammonius]

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Hello everybody,

I don't know anything about embedded systems or bootloaders or most of the
stuff involved with buildroot. I wanted to make an installer that could be
burned to a USB to run a graphical app that depends on Qt. I have the
dependencies and filesystem all set up, but booting the generated iso9660
image gives me this message:

Booting from DVD/CD...

ISOLINUX 6.03  ETCD Copyright (C) 1994-2014 H. Peter Anvin et al

No DFEAULT or UI configuration directive found!

boot: _


Typing anything into the "boot" prompt just repeats the same error message.
Does anyone know how this problem could be fixed?

---
Thanks,
Sam

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