Fake plugged monitor to allow coolbits on maxwell and pascal cards

xorg.conf

# To allow nvidia powermizer settings, we need to define dummy monitors for each card
# Edit the PCI BusId for each cards (lspci | grep VGA)
# Also, you need to dump an EDID file from your monitor

# Here is my dell.edid (2560x1440)
# it's stored in text, hexdump -C format, not binary:
#  00 ff ff ff ff ff ff 00 10 ac 7e 40 4c 54 41 41
#  15 17 01 03 80 3c 22 78 ea 4b b5 a7 56 4b a3 25
#  0a 50 54 a5 4b 00 81 00 b3 00 d1 00 71 4f a9 40
#  81 80 d1 c0 01 01 56 5e 00 a0 a0 a0 29 50 30 20
#  35 00 55 50 21 00 00 1a 00 00 00 ff 00 47 4b 30
#  4b 44 33 35 4f 41 41 54 4c 0a 00 00 00 fc 00 44
#  45 4c 4c 20 55 32 37 31 33 48 4d 0a 00 00 00 fd
#  00 31 56 1d 71 1c 00 0a 20 20 20 20 20 20 00 6f

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
    Screen      1  "FakeScreen1"
    Screen      2  "FakeScreen2"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
    FontPath        "/usr/lib64/X11/fonts/TTF/"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "DELL"
    ModelName      "U2713HM"
    HorizSync       28.0 - 33.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"
#   Option "IgnoreEDIDChecksum" "DFP-0"
#   Option "ModeValidation" "NoDFPNativeResolutionCheck"
EndSection

Section "Device"
    Identifier     "Card1070"
    Driver         "nvidia"
    BusId          "PCI:3:0:0"
    Option         "Coolbits" "29"
    Option         "CustomEDID" "DFP-0:/etc/X11/dell.edid" # text/hex file
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Card1070"
    Monitor        "Monitor0"
    Option         "ConnectedMonitor" "DFP-0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

# Card 2

Section "Device"
    Identifier     "Card1060"
    Driver         "nvidia"
    BusId          "PCI:4:0:0"
    Option         "Coolbits" "29"
    Option         "ConnectedMonitor" "DFP-0"
#   Option         "ConnectToAcpid" "0"
    Option         "CustomEDID" "DFP-0:/etc/X11/dell.edid"
EndSection

Section "Monitor"
    Identifier     "FakeMonitor1"
    VendorName     "Dummy"
    ModelName      "Dummy"
EndSection

Section "Screen"
    Identifier     "FakeScreen1"
    Device         "Card1060"
    Monitor        "FakeMonitor1"
    # Low res/depth to reduce gpu mem
    Option         "metamodes" "DFP-0: 640x480_60 +0+0"
    DefaultDepth   16
EndSection

# Card 3

Section "Device"
    Identifier     "Card970"
    Driver         "nvidia"
    BusId          "PCI:8:0:0"
    Option         "Coolbits" "29"
    Option         "ConnectedMonitor" "CRT-0"
    Option         "CustomEDID" "CRT-0:/etc/X11/dell.edid"
EndSection

Section "Monitor"
    Identifier     "FakeMonitor2"
    VendorName     "Dummy"
    ModelName      "Dummy"
EndSection

Section "Screen"
    Identifier     "FakeScreen2"
    Device         "Card970"
    Monitor        "FakeMonitor2"
    Option         "metamodes" "CRT-0: 640x480_60 +0+0"
    DefaultDepth   16
EndSection

# nvidia-settings -q all
# nvidia-settings -q '[gpu:0]/GPUGraphicsClockOffset[3]'
# nvidia-settings -q '[gpu:0]/GPUMemoryTransferRateOffset[3]'
#
# nvidia-settings -a '[gpu:0]/GPUGraphicsClockOffset[3]=100'
# nvidia-settings -a '[gpu:0]/GPUPowerMizerMode=1'