Hi, there was a fix some days ago in the nvidia Driver in the ProposalDisplayMode.c Please make sure you do the same in the Radeon driver: < { { 193200, 1920, 2048, 2256, 2592, 1200, 1201, 1204, 1242, T_POSITIVE_SYNC}, B_CMAP8, 1920, 1200, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1920X1200) */ --- > { { 154000, 1920, 1968, 2000, 2080, 1200, 1203, 1209, 1235, T_POSITIVE_SYNC}, B_CMAP8, 1920, 1200, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1920X1200) */ $ Bernd