I'm a happy owner of a Sansa e280 mp3 player, this player is able to run the amazing Rockbox firmware of whom I will talk in another post sometime.

The thing is that since Rockbox 3.3 the USB stack for Sansa players is supported and now the player doesn't need to restart with the original firmware to mount the player on your filesystem. However this was not working for me, I was forced to boot the original firmware and then plug the usb cable to be able to change my song collection.

Fortunately I found the solution at the Rockbox site, the issue was caused by a bug on libgphoto and GNU/Linux systems with this library were having the same problem.

The fix is really simple you will only need to remove/comment all XML groups which have the word Sansa contained in the file /usr/share/hal/fdi/information/20thirdparty/10-camera-libgphoto2.fdi

For the sake of simplicity I attached the file so you can just replace your own with mine.

Note: As the Rockbox wiki says this solution is applicable to Gigabeat players too, however my file is not patched for those.