Startup disk creater not loading ISO file in 14.04

Previous answers did not work for me, here is what worked

rename iso image to img file

mv imagename.iso imagename.img

at least in my case I had to move img to Downloads folder otherwise "Startup disk creator" did not see it

mv imagename.img ~/Downloads/imagename.img

Then open "startup disk creator" and choose appropriate USB (img should be automatically chosen)

For more details on iso and img renaming look in How to create an .img file from .iso on Ubuntu?

You can use unetbootin for making bootable usb stick. It works out of the box.

1. To install use the command sudo apt-get install unetbootin
2. open from terminal with command sudo unetbootin and give your password.
3. choose your iso image browsing the folder where you have kept it
4. choose your usb stick
5. click ok and wait until it is done.

It works pretty smooth in any platform.

Startup Disk Creator looks in the Downloads directory by default. If finds any ISOs it sticks and will only let you use that ISO with the highest number and Ubuntu in its name. I solve this by moving ALL the ISOs from my Download directory in another directory. Startup Disck Creator can't default to any ISO so it comes up blank. It will then let you select ISO's from other directories as normal.

My exact process is:

1. Move all ISOs from ~/Downloads to ~/Downloads/ISOs
2. Run Startup Disk Creator, Source table will be blank
3. Click Other...
4. Open ISOs from any location as normal (in my case ~/Downloads/ISOs)

Hope this helps

This is only based on my computers running 12.04.4. Your mileage may differ.