I've made a LUT-based profile and am trying to load it (where are they loaded anyways, system software, gpu, monitor?). When alternating between clearing profiles from the system and loading my LUT-based profile, I see a quick flicker on the screen (but not one of the audible ones where the CRT makes noise). However, I don't notice any change in my ~18% neutral gray desktop background. I have a Sony GDM-F520 CRT monitor, 2048x1536. xrandr reports detected EDID modes, so I'm not sure why I'm getting these weird "Failed to get EDID for display" messages. (DVI-I_2/analog is my CRT, I'm not using the other one at the moment). * $ sudo /opt/Argyll/bin/dispwin -v -c; dispwin -v -E 9 -V colprof-sony-gdm-f520-3000-patches-12-6-2009.icc* About to open dispwin object on the display About to clear the calibration About to destroy dispwin object Checking XRandR 1.2 VideoLUT access Display 0 name = ':0.0' Failed to get EDID for display Checking XRandR 1.2 VideoLUT access Display 1 name = ':0.0' Failed to get EDID for display About to open dispwin object on the display Opened display OK dispwin_get_ramdac called Getting gamma using Randr 1.2 dispwin_get_ramdac called Getting gamma using Randr 1.2 Verify: 'colprof-sony-gdm-f520-3000-patches-12-6-2009.icc' is NOT loaded (discrepancy 12.2%) About to destroy dispwin object dispwin_del called About to close display finished *$ sudo /opt/Argyll/bin/dispwin -v -E 9 -I colprof-sony-gdm-f520-3000-patches-12-6-2009.icc ; dispwin -v -E 9 -V colprof-sony-gdm-f520-3000-patches-12-6-2009.icc* Checking XRandR 1.2 VideoLUT access Display 0 name = ':0.0' Failed to get EDID for display Checking XRandR 1.2 VideoLUT access Display 1 name = ':0.0' Failed to get EDID for display About to open dispwin object on the display Opened display OK dispwin_get_ramdac called Getting gamma using Randr 1.2 About to install 'colprof-sony-gdm-f520-3000-patches-12-6-2009.icc' as display's default profile dispwin_set_ramdac called Setting gamma using Randr 1.2 X Error of failed request: BadValue (integer parameter out of range for operation) Major opcode of failed request: 150 (RANDR) Minor opcode of failed request: 13 () Value in failed request: 0x3b Serial number of failed request: 12 Current serial number in output stream: 14 Checking XRandR 1.2 VideoLUT access Display 0 name = ':0.0' Failed to get EDID for display Checking XRandR 1.2 VideoLUT access Display 1 name = ':0.0' Failed to get EDID for display About to open dispwin object on the display Opened display OK dispwin_get_ramdac called Getting gamma using Randr 1.2 dispwin_get_ramdac called Getting gamma using Randr 1.2 Verify: 'colprof-sony-gdm-f520-3000-patches-12-6-2009.icc' IS loaded (discrepancy 0.0%) About to destroy dispwin object dispwin_del called About to close display finished *$ xrandr* Screen 0: minimum 320 x 200, current 2048 x 1536, maximum 3840 x 3936 DVI-I_1/digital connected 1920x1200+0+0 (normal left inverted right x axis y axis) 480mm x 300mm 3840x2400 12.7 + 1920x2400 20.1 1920x1200 40.9* 1600x1200 59.9 1280x1024 75.0 59.9 1024x768 84.9 75.1 70.1 60.0 800x600 84.7 72.2 75.0 60.3 56.2 640x480 84.4 75.0 72.8 60.0 DVI-I_1/analog disconnected (normal left inverted right x axis y axis) DVI-I_2/digital disconnected (normal left inverted right x axis y axis) DVI-I_2/analog connected 2048x1536+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 2048x1536_73 73.0*+ 2048x1536 60.0 1920x1440 75.0 60.0 1856x1392 75.0 60.0 1792x1344 75.0 60.0 1600x1200 85.0 75.0 70.0 65.0 60.0 1680x1050 84.9 74.9 69.9 60.0 1600x1024 60.2 1400x1050 85.0 74.8 70.0 60.0 1280x1024 85.0 75.0 60.0 1440x900 59.9 1280x960 85.0 60.0 1360x768 59.8 1152x864 100.0 85.1 85.0 75.0 75.0 70.0 60.0 1024x768 85.0 75.0 70.1 60.0 43.5 832x624 74.6 800x600 85.1 72.2 75.0 60.3 56.2 640x480 85.0 72.8 75.0 59.9 720x400 85.0 640x400 85.1 640x350 85.1