syslinux not working with usb device

[Hadmut Danisch]

Hi,

I've noticed that one of my scripts, that creates bootable USB pendrives and worked for ages stopped to work under 15.10.

I've tracked this down to a problem with syslinux. See the script attached.

Under ubuntu 14.04 the script works, it creates a usb pendrive, that properly boots into syslinux (as expected to the point where it complains about the missing config file, test script does not install a configuration file).

But under ubuntu 15.10 the boot process aborts after the
SYSLINUX 6.03 EDD 20150813 ...

line with

Boot error

(testing with a 8GB usb pendrive)

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: syslinux 3:6.03+dfsg-8ubuntu2
ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3
Uname: Linux 4.2.0-17-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Nov 19 19:52:20 2015
Dependencies:
 gcc-5-base 5.2.1-22ubuntu2
 libc6 2.21-0ubuntu4
 libgcc1 1:5.2.1-22ubuntu2
 mtools 4.0.18-2
 syslinux-common 3:6.03+dfsg-8ubuntu2
InstallationDate: Installed on 2015-10-08 (41 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
SourcePackage: syslinux
UpgradeStatus: No upgrade log present (probably fresh install)