This is on a Fujitsu Siemens Celsius H240. 1. laptop without dockingstation, no external monitor Checking connectors on 0x71C4, 0x10CF, 0x13B5 (@01:00:00): Load Detection: RHD_OUTPUT_NONE HotPlug: RHD_HPD_NONE DDC: RHD_DDC_NONE LVDS Info: 18bits, dual link, LDI Panel found. Power Timing: 0xF9F, 0x012, 0x03, 0x19, 0x224 Macro: 0x0CF20407, Clock Pattern: 0x0063 2. tft connected to analog output Checking connectors on 0x71C4, 0x10CF, 0x13B5 (@01:00:00): Load Detection: RHD_OUTPUT_DACA HotPlug: RHD_HPD_NONE DDC: RHD_DDC_0 LVDS Info: 18bits, dual link, LDI Panel found. Power Timing: 0xF9F, 0x012, 0x03, 0x19, 0x224 Macro: 0x0CF20407, Clock Pattern: 0x0063 3. put laptop into dockingstation, tft connected to dvi output of docking station, removed analog connection (blocked by dockingstation) Checking connectors on 0x71C4, 0x10CF, 0x13B5 (@01:00:00): Load Detection: RHD_OUTPUT_TMDSA HotPlug: RHD_HPD_0 DDC: RHD_DDC_1 LVDS Info: 18bits, dual link, LDI Panel found. Power Timing: 0xF9F, 0x012, 0x03, 0x19, 0x224 Macro: 0x0CF20407, Clock Pattern: 0x0063 4. laptop booted in dockingstation with lid closed, tft connected to dvi output of docking station Checking connectors on 0x71C4, 0x10CF, 0x13B5 (@01:00:00): Load Detection: RHD_OUTPUT_TMDSA HotPlug: RHD_HPD_0 DDC: RHD_DDC_1 LVDS Info: 18bits, single link, LDI Panel found. Power Timing: 0x000, 0x012, 0x00, 0x00, 0x000 Macro: 0x04420403, Clock Pattern: 0x0063 5. removed external dvi Checking connectors on 0x71C4, 0x10CF, 0x13B5 (@01:00:00): Load Detection: RHD_OUTPUT_NONE HotPlug: RHD_HPD_NONE DDC: RHD_DDC_NONE LVDS Info: 18bits, single link, LDI Panel found. Power Timing: 0x000, 0x012, 0x00, 0x00, 0x000 Macro: 0x04420403, Clock Pattern: 0x0063 6. opened lid Checking connectors on 0x71C4, 0x10CF, 0x13B5 (@01:00:00): Load Detection: RHD_OUTPUT_NONE HotPlug: RHD_HPD_NONE DDC: RHD_DDC_NONE LVDS Info: 18bits, dual link, LDI Panel found. Power Timing: 0xF9F, 0x012, 0x03, 0x19, 0x224 Macro: 0x0CF20407, Clock Pattern: 0x0063 With 6 I'm back to the results of 1. After 6 I am unable to get any other Macro than 0x0CF20407 without rebooting.