Both Gamma and X-point are already included in the k-point set that you are using in the scf-calculation. With the input file you provided, I got the energies which are clearly not the same:
k = 0.0000 0.0000 0.0000 ( 3119 PWs) bands (ev): -8.8751 -6.6653 -6.6653 -5.8658 -0.8107 -0.8107 -0.8107 3.1632 3.1632 3.1632 3.2952 3.2952 3.2952 5.6642 5.6642 5.6642 k = 0.0000 0.0000-0.5000 ( 3178 PWs) bands (ev): -7.9545 -7.8977 -6.6043 -6.0557 -0.3493 -0.3493 1.0219 2.0320 2.0320 2.3674 2.4642 2.7178 4.2172 4.2172 4.2869 4.2869 So, most likely it's as Paolo said. By the way, usually if you want to get correct results for GaAsN you should have Ga-3d electrons included in the calculations, although it seems that such pseudos are available only for PBE in the QE homepage. Hannu-Pekka Komsa EPFL, Switzerland > Hello all, I have tried to calculate band structure of GaAsN, but my > calculation is always giving the same energy values at Gamma and X > point, my program is as follow, I change lots of expression in > program, but the results are always same, energy values of Gamma and > X same. >