Hi, One possible cause is the "igfxpers.exe" process. Check if you have that process running. If so, terminate it (and temporarily rename the file on disk; the app gets restarted frequently) and check whether the problem still exists. Kind regards, Ridouan. On Sun, Jan 29, 2012 at 12:08 AM, Іван Циба <ivantsyba@xxxxxxxxx> wrote: > Hi list. > I'm just calibrated display on HP 4730s laptop with both Radeon and Core > i3 integrated video chips and it loses calibration after UAC prompt, > resuming from sleep etc. I clearly see it, because display has strong blue > tint when not calibrated (as all cheap laptop displays now). > I try to load calibration curves by dispcalGUI Profile Loader from > startup, or by system tool from Color Management settings. When both this > methods enabled, during laptop starting I see that curves is loaded on user > logon, then they unloaded, when desktop appear, and then curves is loaded > again (i think that dispcalGUI Profile Loader executed on that moment). > I think, Windows (7, 64 bit) is changing GPUs during startup or after UAC > prompt, and they did not remember LUT settings after switching. > Any suggestions or solutions? > > Sorry for my English again > Thanks >