My mouse have 6 buttons (1 left, 1 right, 1middle, 2 for adjusting the sensitivity of the mouse, 1 thumb button (that is the one that doesn't work)) The buttons are default mapped (with the thumb button I can go back in FF/jump in ET:QW) so it is working on linux Code: here are 32 pointer buttons defined. Physical Button Button Code 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 o_0 I don't have that much buttons on my mouse