A friend of mine gave me his samsung MP3 player, because he considered it broken. It was indeed behaving incredibly strange. The symptoms were:
1) After turning it on, it said "system-loading" and always turned itself off when it reached 20%
2) When I tried connecting it to my computer (using USB), the "USB connect" icon on the display was flashing, and I saw in dmesg output that it continously tried to re-connect/disconnect itself.
3) After a clean format, it always displayed "disconnected / charging" and would not show up as mass storage device.
[SOLUTIONS]
1) It seems to have puked due to some file system problems. Solved by formatting.
2) This was caused by my USB ports not emitting enough power. I had to plug an active USB hub in between, so the battery could recharge itself from the USB port.
3) Super strange, but I had to use amarok, manually add a "MTP device" and connect once. Suddenly my system popped up the "new device found" dialog.
EDIT: It didn't have anything to do with MTP, but with my faulty USB hub. Just execute "lsusb" once to bump the device. See
forum post #1753 for details.
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