xrandr --setprovideroffloadsink 0x88 0x5f
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  34 (RRSetProviderOffloadSink)
  Value in failed request:  0x88
  Serial number of failed request:  16
  Current serial number in output stream:  17

xrandr --setprovideroffloadsink 1 0

DRI_PRIME=1 glxinfo | grep "OpenGL renderer"
OpenGL renderer string: NV108

tring: SGI
client glx vendor string: Mesa Project and SGI
    Vendor: Intel Open Source Technology Center (0x8086)
OpenGL vendor string: Intel Open Source Technology Center

xrandr --setprovideroffloadsink 0 1
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  34 (RRSetProviderOffloadSink)
  Value in failed request:  0x88
  Serial number of failed request:  16
  Current serial number in output stream:  17