[syslinux] syslinux compatibility with modern Linux distributions

[Martin T]

Thanks, this worked! What does the boot-time parameter "boot=casper"
mean? In addition, what does the "cdrom-detect/try-usb=true"
technically change?



regards,
Martin


On Sun, Aug 16, 2015 at 9:24 PM, Marcin Celebucki
<marcincelebucki at gmail.com> wrote:
> Hi Martin
>
> You forgot add option which is required, see below:
>
> LABEL Ubuntu
> LINUX vmlinuz
> APPEND initrd=initrd.lz iso-scan/filename=/ubuntu-14.04.3-desktop-i386.iso
> boot=casper cdrom-detect/try-usb=true
>
> Thanks
>
> 2015-08-16 19:37 GMT+02:00 Martin T via Syslinux <syslinux at zytor.com>:
>>
>> Hi,
>>
>> I remember I had a bootable USB flash drive with few Linux
>> distributions four to five years ago. iso files for Linux
>> distributions and initial ramdisk(copied from extracted iso file) and
>> Linux kernel(copied from extracted iso file) were on the USB flash
>> drive. So I tried to create something similar with latest Ubuntu and
>> in order to keep things simple, I did not add any additional
>> distributions at first. Content of the bootable USB flash drive is
>> following:
>>
>> # ls -l usb/
>> total 1066232
>> -rwxr-xr-x 1 root root   21276686 aug   16 13:11 initrd.lz
>> -r-xr-xr-x 1 root root      32256 aug   16 11:47 ldlinux.sys
>> -rwxr-xr-x 1 root root        113 aug   16 13:00 syslinux.cfg
>> -rwxr-xr-x 1 root root 1064304640 aug   16 13:11
>> ubuntu-14.04.3-desktop-i386.iso
>> -rwxr-xr-x 1 root root    6191392 aug   16 13:11 vmlinuz
>> #
>>
>> Content of syslinux configuration file looks like this:
>>
>> # cat usb/syslinux.cfg
>> DEFAULT Ubuntu
>>
>> LABEL Ubuntu
>> LINUX vmlinuz
>> APPEND initrd=initrd.lz
>> iso-scan/filename=/ubuntu-14.04.3-desktop-i386.iso
>> #
>>
>> Now if I try to boot from this USB flash drive, the system seems to
>> behave like it does not find an optical drive and ends up in BusyBox.
>> I also tried with latest Debian and Kali Linux. Is there a mistake in
>> my configuration file? Or is it not possible to boot Linux
>> distributions like that any more?
>>
>>
>>
>> thanks,
>> Martin
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>
>
>
>
> --
> Thanks / Dziekuje
> Regards / Pozdrawiam
>
> Marcin Celebucki