Dual monitor user beware output color depth reset

Discussion in 'Videocards - NVIDIA GeForce Drivers Section' started by DummyPLUG, May 18, 2017.

  1. DummyPLUG

    DummyPLUG Member Guru

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    GPU:
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    I had U3014(primary), U3017(secondary), Maxwell Titan x, both using DP and 10bit color depth, if I switch the input of U3014 to HDMI then back to DP while keep the U3017 turn on, then the U3014 will reset the color depth to 8bit when reconnect to DP.
    last know good driver which will stay on 10bit is 378.92.

    dunno if it will affect all monitor/system but if you got 2 monitor better take a look

    p.s. bug still exist on 382.19
     
  2. dr_rus

    dr_rus Ancient Guru

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    Noticed this as well, looks like another WDDM 2.2 issue to fix somewhere by someone.
     
  3. dr_rus

    dr_rus Ancient Guru

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    Btw, this happens after a reboot as well - the color depth is reset back to 8 bit on U3014.
     
  4. Tantawi

    Tantawi Member Guru

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    I have the exact problem, very annoying indeed! hope there is a fix soon.
     

  5. Plug2k

    Plug2k Maha Guru

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    yup , no point in even selecting any of them, as they reset on reboot or reset on monitor reactivation,, quite useless....
     
  6. dr_rus

    dr_rus Ancient Guru

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    The funny part is that the driver seems to remember to keep 12 bit output for my HDMI connected TV between reboots and display config changes. It's only the 10 bit DP output which is constantly resets to 8 bit.
     
  7. pharma

    pharma Master Guru

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    Are you both using Win 10? Doesn't seem to happen on Win 7 with U3011 using DP.
     
  8. dr_rus

    dr_rus Ancient Guru

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    Sure, 1703, was fine in 1607.
     
  9. dr_rus

    dr_rus Ancient Guru

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    This is fixed for me in 382.33.
     
  10. Tantawi

    Tantawi Member Guru

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    Same, confirmed! :)
     

  11. Mufflore

    Mufflore Ancient Guru

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    This is mildly related and may help your diagnosis.

    I use 2 DP to HDMI adapters and neither give the option to change the colour settings other than bit depth. It appears to be set to RGB full from the image quality.
    Changing from real HDMI to DP and back makes no difference to the real HDMI settings.
    Rebooting is also OK.

    Each time I install an NVidia driver the real HDMI colour settings are reset to RGB limited.
    This might have a similar root cause as the ops problem.
     

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