Grub background image -- no longer showing

[Snowhog]

Okay, could use some help/insight/suggestions.

Two days ago my background image I use for the Grub background was working just fine. I pulled down the 1600x900 .jpg image from the Web (I had been using a larger, but resized image) and replaced the existing image with this one. Ran sudo update-grub, which correctly reports:

Generating grub.cfg ...
Found background: /usr/share/images/grub/Tree1600x900.jpg
Found background image: /usr/share/images/grub/Tree1600x900.jpg
Found linux image: /boot/vmlinuz-3.8.0-22-generic
Found initrd image: /boot/initrd.img-3.8.0-22-generic
Found linux image: /boot/vmlinuz-3.8.0-21-generic
Found initrd image: /boot/initrd.img-3.8.0-21-generic
done

However, on a reboot of the PC, the background image is not being displayed; just the text menu. What happened?

Added:
Okay, solved. Over on Ubuntu Forums, this thread: Grub2 - background picture was posting the same question, and the poster found that changing the image type to a .png worked, but .jpg did not, even though it is a recognized file type. Hmm. No matter, my Grub background image is displayed again.

Would like to know why .jpg stopped working though.

[ronw]

Not sure if this is it, but jpgs seem to require specific formatting:


"JPG/JPEG images must be 8-bit (256 color)
Images should be non-indexed, RGB"


http://www.thegeekstuff.com/2012/10/grub-splash-image/