The PDF does not contain a gradient. It contains a series 2 point high filled rectangles designed to look like a gradient. Evince has trouble with white seams showing between adjacent fills due to antialiasing.
The best solution would be if openoffice used a PDF gradient. The bug where evince rendered gradients using lots of thin rectangles with visible seams was fixed a long time ago. Evince now uses cairo gradients and will render PDF linear gradients fine without any stripes.
The PDF does not contain a gradient. It contains a series 2 point high filled rectangles designed to look like a gradient. Evince has trouble with white seams showing between adjacent fills due to antialiasing.
The best solution would be if openoffice used a PDF gradient. The bug where evince rendered gradients using lots of thin rectangles with visible seams was fixed a long time ago. Evince now uses cairo gradients and will render PDF linear gradients fine without any stripes.