I donn't think, that this is solution of my problem, Strange thing is, that xrandr support 800x600 and 640x480, monitor also support those resolutions. I don't know what should I do, to fix this. Xrandr gives: > Screen 0: minimum 320 x 240, current 1280 x 1024, maximum 1280 x 1024 > default connected 1280x1024+0+0 0mm x 0mm > 1280x1024 50.0* 54.0 > 1024x768 51.0 59.0 60.0 > 800x600 52.0 64.0 65.0 66.0 67.0 68.0 > 640x480 53.0 73.0 74.0 75.0 > 1280x960 55.0 > 1280x800 56.0 > 1280x768 57.0 > 1152x864 58.0 > 960x600 61.0 > 840x525 62.0 > 832x624 63.0 > 800x512 69.0 > 720x450 70.0 > 640x512 71.0 72.0 > 640x400 76.0 > 640x384 77.0 > 576x432 78.0 > 512x384 79.0 80.0 81.0 > 416x312 82.0 > 400x300 83.0 84.0 85.0 86.0 > 320x240 87.0 88.0 89.0
