cldjean wrote:When I run as root, Xsane recognizes the scanner but doesn't work properly. Booting preview wizard takes a very long time and when preview is done, the image is dark.
"image is dark" means the image is OK and just too dark, or is it completely black?
Then this sounds like https://bugs.mageia.org/show_bug.cgi?id=21244 which seems to be a problem with an USB 3 port, and the same scanner works with an USB 2 port.