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[Bug 1325801] Re: failed to boot from USB disk with error: gfxboot.c32: not a COM32R Image boot:

 

Computer: http://www.toshiba.se/laptops/satellite-pro/c850/satellite-
pro-c850-19w/

I have used it for iso-testing of trusty, utopic and vivid - so I know
that it is compatible with Ubuntu and Lubuntu.

I tested to install Lubuntu 15.04 from the desktop 32-bit bit iso file
with usb-creator-gtk in a system installed from

ubuntu-14.04.2-desktop-amd64.iso

added

deb http://archive.ubuntu.com/ubuntu/ trusty-proposed restricted main
multiverse universe

to

/etc/apt/sources.list

and updated/dist-upgraded to make the system completely up to date.

This bug affected the installation before adding the proposed
repository. The version of usb-creator-gtk from 'proposed' fails to
install the bootloader. The version that comes with 14.04.2 LTS could
install the bootloader but suffers from this bug (1325801).

I tried again after wiping the drive separately (new partition table and
new FAT32 partition), unmount, un-plug and re-plug the pendrive for usb-
creator-gtk to work, but it failed again. I started with the installed
system running via USB 3, which works with Unetbootin and mkusb. I moved
the SSD to the internal bay, and tried again, but I still had the same
problem.

Maybe this is a problem with the authentication method? Or a problem
with chroot (if that is used)?

Anyway, I tried to boot from the pendrive, which seems to have 'all the
files' but not the bootloader. But it does not work, I get a flashing
cursor at the top left corner of the screen.

Finally I tried to create a pendrive without persistence. But usb-
creator-gtk still fails when trying to install the bootloader.

I do not feel authorized to change any tag.

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https://bugs.launchpad.net/bugs/1325801

Title:
  failed to boot from USB disk with error: gfxboot.c32: not a COM32R
  Image boot:

Status in Ubuntu CD image build software:
  In Progress
Status in Ubuntu Kylin:
  Triaged
Status in usb-creator package in Ubuntu:
  Fix Released
Status in usb-creator source package in Lucid:
  Triaged
Status in usb-creator source package in Precise:
  Triaged
Status in usb-creator source package in Trusty:
  Fix Committed
Status in usb-creator source package in Utopic:
  Fix Released

Bug description:
  [Impact]
  It is common to use usb-creator to write new USB devices with a version of Ubuntu which will then be used to upgrade or proceed with a new installation. In some cases, when using a specific match of versions of Ubuntu with an incompatible syslinux, the resulting USB device will show errors and not display the splash menu to use to select between Live and Install mode, or enabling extra options.
  This patch fixes this incompatibility by always using the syslinux version provided on the ISO image being used to write the USB device; which would always be compatible with the system to install if it's available. 

  [Test Case]
  1- Use usb-creator to write a new USB device with a version of Ubuntu with a different syslinux:
     Precise: use 13.10 or later.
     Trusty: use 13.04 or earlier.
     Utopic: use 13.04 or earlier.
  2- Boot on the USB, verify that the splash screen is shown and that you can get into a live session.

  [Regression Potential]
  This may yield cases in which the written USB device may be unbootable, due to having written syslinux data to the boot sector incompatible with the version of Ubuntu to be installed. USB devices may also be bootable but not show the splash screen and menu.

  --

  系    统:UK 14.10  6-2 dailybuild 32 位
  机器型号:dell  Inspiron-560s
  现    象:用U盘制作启动盘,不能启动,提示信息:gfxboot.c32: not a COM32R Image boot: 见附件图片

  this bug is similar with Bug #645818, but we cannot confirm whether
  they are the same.

  WORKAROUND: One may enter the live environment by typing the following and hitting enter:
  live

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