what does "+"(preferred) means in xrandr?

[pengyixiang]

hello everyone！
    What the “preferred" means in xrandr?  Is it setted by display hardware? Can we set it manual? If we call “XOpenDisplay” to open default screen and then poll the returned x11_fd, will we interrupted for “preferred" changed? Is there others docs about it? Looking forward to your reply.




Cheers，
Pencc

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