The 16.04 ISO does not boot from USB stick. I get the following error:

Missing parameter in configuration file. Keyword: path
gfxboot.c32: not a COM32R image
boot :

I made a boot stick with Startup Disk Creator on 14.04 LTS on a HP Pavillion laptop. I tried the solutions on these posts without success:

Ubuntu 16.04 final not booting from stick: gfxboot.c32: not a COM32R image

Ubuntu 14.04 LTS live USB boot error (gfxboot.c32:not a valid COM32R image)

When I type any of the options revealed by [TAB] after the boot: prompt and hit [ENTER], the computer reboots. I tried: live, live-install, check and hd. After rebooting, the boot: prompt appears again. Also, the prompt keeps getting printed to screen every few seconds if I don't do anything.


The ISO might have been corrupted. Re-downloading it in a Windows PC and making the USB there solved the issue.

1 Answer 1


This is bug 1325801. The wrong version of syslinux gets used, the one from the running system instead of the one from the ISO. If you have a runnable 16.04 live system, you can use it to make another one with Startup Disk Creator, or just use mkusb on the 14.04 system, which will give you a safer way to use dd, which works too.

  • The explanation for that bug is in one of the links I posted. However, the workaround for that bug did not work for me. I think it was a corrupted ISO. In any case, making the USB in another system worked. Oct 5, 2016 at 15:34
  • now I made the stick with 16.04 ubuntu desktop on 16.04 lubuntu desktop, on boot the screen splashes with usual purple and man-icon then I get uncompression error -- System halted...
    – xealits
    Feb 2, 2018 at 17:58
  • if I quickly press enter during the purple screen it goes to usual menu with "Try ubuntu/install/memcheck" etc options. But on "install" I get Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) -- there are several disks in the system, maybe it randomly picks up one of them.
    – xealits
    Feb 2, 2018 at 18:01

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