On Wed, May 21, 2014 at 06:14:42PM EDT, John Hupp wrote:
I'm trying to design a theme, and I'm using a certain png file for
both desktop-image and GRUB_BACKGROUND. After I update-grub and
reboot, I get error: png: interlace method not supported.
[...]
Open the png in the Gimp and "export" (file menu) it to whatever.png.
You will be presented with a popup with "advanced options". Uncheck
"progressive" before clicking "Export".
If I understand the message correctly this should solve your problem.
CJ
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