Connected D1918H through HDMI and made Dell D1918H as DEFAULT DISPLAY. DDM is still not detecting the D1918H monitor? The following is the diagnostic report from DDM :
Diagnostic Report, generated 01 Mon-Jan-2018 (10.0.16299)
Copyright (c) 1995-2018, EnTech Taiwan.
Version = 1.31.0.1899
OS = 10.0.16299.2 x64
Mechanism = 3
Account = Standard
Command line = "C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe"
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LastCheck = 0x0000A85B
HintShown = 0x00000001
AutoRestoreWindowLayout = 0x00000000
FW.DEL2005.3CC4976P0WVE = 0x00000000
EnumErrorCount = 0x00000000
////////////////////////////////////////
10:24:45.850...Log opened
10:24:45.959...LanguageID = 00000409 00000409 00004009
10:24:45.974...Build = 1.31.0.1899
10:24:45.974...Windows handles = 0004009A 0001013C 00070050
10:24:45.975...OS monitor sleep timeout value = 600 ms.
10:24:45.976...Applied DPI = 106-106
10:24:45.976...VM = 0
10:24:46.169...Starting enumeration
10:24:46.249...1. DEL2005.3CC4976P0WVE on Intel(R) HD Graphics Family
10:24:46.250......Monitor assignment = 1
10:24:46.250......Adapter name = \\.\DISPLAY1
10:24:46.250......Monitor name = DELL D1918H (HDMI)
10:24:46.250......Vendor ID = 8086
10:24:46.252......GPU driver = igdumdim64 20.19.15.4835
10:24:46.252......Flags = 08000005.00000003
10:24:46.252......Display tag = 3E668004
10:24:46.252......Monitor number = 1
10:24:46.252......Monitor handle = 00010001
10:24:46.253......Raw EDID = 00FFFFFFFFFFFF0010AC0520010101011A1B0103802917782AEBC5A25754A0270C5054A54B0001010101010101010101010101010101662156AA51001E30468F33009AE61000001E000000FF003343433439373650305756450A000000FC004431393138480A202020202020000000FD00384B1E5309000A202020202020013E
10:24:46.321......VCP10 = 0064003C
10:24:46.322......OS device handle = 00010001.00000000
10:24:46.322......Capabilities string = (prot(monitor)type(lcd)model(l19bpecskdk0)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 0b 0c 10 12 14(04 05 08 0b) 16 18 1a 1e 20 30 3e16 18 1a 60(01 03)62 6b 87 8d(01 02)ac aeb6 c6 c8 c9 ca(01 02) cc(01 02 03 04 06 09 0d 14 1e) d6(01 05) df e1)mccs_ver(2.1)asset_eep(64)mpu_ver(vp04)mswhql(1) (cached)
10:24:46.508......Error: GetVCPFDh: 0xC0262584.00010001 = The monitor does not support the specified VCP code
10:24:46.508......Configuration = 0.6F.1B1A
10:24:46.509......Discarding unsupported display: DEL2005.3CC4976P0WVE on Intel(R) HD Graphics Family
10:24:46.510......Skipping unsupported device MONITOR\SDC4951\{4d36e96e-e325-11ce-bfc1-08002be10318}\0001
10:24:46.514...Ending enumeration
10:24:46.519...New=DEL2005.0003 SDC4951.0001
10:24:46.533...Video power down timeout = 600
10:24:46.534...User session connect
10:24:46.534...Display powered ON
10:24:51.530...Refreshing screen object
10:25:17.012...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
10:25:17.013...Dump: complete Windows device enumeration
10:25:17.013...1.DeviceName = \\.\DISPLAY1
10:25:17.014.....DeviceFlags = 08000005
10:25:17.014.....DeviceString = Intel(R) HD Graphics Family
10:25:17.014.....DeviceID = PCI\VEN_8086&DEV_0A16&SUBSYS_2281103C&REV_0B
10:25:17.014.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{CEFC1864-D11D-11E7-9AA3-9A9C8A0ED9E9}\0000
10:25:17.016.....a.MonitorName = \\.\DISPLAY1\Monitor0
10:25:17.017.......MonitorFlags = 00000003
10:25:17.017.......MonitorString = DELL D1918H (HDMI)
10:25:17.017.......MonitorID = MONITOR\DEL2005\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
10:25:17.017.......MonitorKey = \Registry\Machine\System\CurrentControlSet\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
10:25:17.018.......Raw EDID = 00FFFFFFFFFFFF0010AC0520010101011A1B0103802917782AEBC5A25754A0270C5054A54B0001010101010101010101010101010101662156AA51001E30468F33009AE61000001E000000FF003343433439373650305756450A000000FC004431393138480A202020202020000000FD00384B1E5309000A202020202020013E
10:25:17.020...2.DeviceName = \\.\DISPLAY2
10:25:17.020.....DeviceFlags = 00000001
10:25:17.021.....DeviceString = Intel(R) HD Graphics Family
10:25:17.021.....DeviceID = PCI\VEN_8086&DEV_0A16&SUBSYS_2281103C&REV_0B
10:25:17.021.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{CEFC1864-D11D-11E7-9AA3-9A9C8A0ED9E9}\0001
10:25:17.023.....a.MonitorName = \\.\DISPLAY2\Monitor0
10:25:17.023.......MonitorFlags = 00000003
10:25:17.024.......MonitorString = Generic PnP Monitor
10:25:17.024.......MonitorID = MONITOR\SDC4951\{4d36e96e-e325-11ce-bfc1-08002be10318}\0001
10:25:17.024.......MonitorKey = \Registry\Machine\System\CurrentControlSet\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0001
10:25:17.025.......Raw EDID = 00FFFFFFFFFFFF004C8351490000000000170104902213780A71059355578F2920505400000001010101010101010101010101010101CE1D56F0500018304030250058C210000019D81356F0500018304030250058C21000001900000000000000000000000000000000000000000002000C4CFF0A3C64141524640000000003
10:25:17.027...3.DeviceName = \\.\DISPLAY3
10:25:17.027.....DeviceFlags = 00000000
10:25:17.027.....DeviceString = Intel(R) HD Graphics Family
10:25:17.028.....DeviceID = PCI\VEN_8086&DEV_0A16&SUBSYS_2281103C&REV_0B
10:25:17.028.....DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{CEFC1864-D11D-11E7-9AA3-9A9C8A0ED9E9}\0002
10:25:17.029...Total number of monitors enumerated = 2
10:25:17.030...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\