Late to the party I'm afraid, but I've scanned all the posts, and more important: I have an SW271 monitor and have calibrated/profiled it satisfactorily with Palette Master, without any difference betwen Develop and Library, with or without graphics processor! A few comments: IMHO, don't use v2 profiles - that's probably why you got the error messages going into Photoshop, and it may explain the LR issues. Photoshop doesn't work with v4 profiles and tells you, LR doesn't work fully with v4 profiles, but doesn't tell you! I think this may be what you are seeing. From memory when I tried this a year ago, v4 profiles resulted in a difference betwen Library and Develop modules. As I recall, LR fails with v4 profiles with the graphics processor in Develop module, but I might have remembered that incorrectly. You probably know this, but after calibrating/profiling a monitor, don't touch ANY monitor control except the on/off switch, or you are likely to end up with the monitor not matching the profile. If you change the monitor colour space e.g. with the puck or front panel controls, it changes the monitor but not the profile. You must change the profile manually (Control Panel -> Colour Management) to a profile appropriate for the new monitor setting. This is a hokey feature of Benq software. With my Eizo, I can change both the monitor colour space and profile with an Eizo software utility. Although Palette Master is a bit hokey, it does work and does create correct profiles. Use v2, Matrix profile and (I suggest) System Level profile (all these are on the second screen of calibration headed "Measurement"). As Todd suggested, I use "Panel Native" for the "RGB Primaries" drop-down on the "Display Settings" screen. This calibrates the monitor to its widest gamut, which is a bit wider than Adobe RGB. But whatever you calibrate it to, make a note of the name of the profile it creates (easy enough as the profile name contains all the settings and the date) and if you change calibration (e.g. with the puck) then remember to change the profile in Control Panel to the one for that calibration. You also need to exit and restart LR (or any other software you're using to view images) as most programs check the monitor profile only once when they start. Personally, I don't have much use for calibrating a wide-gamut monitor other than to panel native, which is always going to be the widest gamut it can support. If I want to see what an image looks like in Adobe RGB or sRGB I use soft-proofing in LR, which is quicker than changing the monitor, changing the profile, and then exiting and restarting LR to make it pick up the new profile. Hardly a quick A-B check! Hope that helps. Once I got over the confusing way Palette Master works, I've had no problems, and with colour-managed programs, colour has been identical in LR Library and Develop, Photoshop and any other colour-managed software, and identical to my Eizo monitor, so I'm confident it's working OK.
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