Upon opening the Nvidia X Server Settings program, it reports contradictory things. The xserver configuration shows my monitor as having the resolution 1024x768, which is definitely not the dimension my monitor is capable of, while the X Screen 0 tab shows the dimensions correctly as 1920x1080.
Xrandr provides the following information:
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384
DVI-I-0 disconnected primary (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
DVI-I-2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 298mm
1024x768 60.0 +
800x600 60.3 56.2
720x576 50.0
720x480 59.9
640x480 59.9
HDMI-0 disconnected (normal left inverted right x axis y axis)
DVI-I-3 disconnected (normal left inverted right x axis y axis)
1920x1080 (0x2b7) 148.5MHz
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.5KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.0Hz
Upon examining the Xorg.0.log, I noticed the following:
164.439] (--) NVIDIA(0): Valid display device(s) on GeForce GTX 550 Ti at PCI:1:0:0
164.439] (--) NVIDIA(0): CRT-0
164.439] (--) NVIDIA(0): CRT-1
164.439] (--) NVIDIA(0): Samsung SyncMaster (DFP-0) (connected)
164.439] (--) NVIDIA(0): DFP-1
164.439] (--) NVIDIA(0): DFP-2
164.439] (--) NVIDIA(0): CRT-0: 400.0 MHz maximum pixel clock
164.439] (--) NVIDIA(0): CRT-1: 400.0 MHz maximum pixel clock
164.439] (--) NVIDIA(0): Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
164.439] (--) NVIDIA(0): Samsung SyncMaster (DFP-0): Internal Dual Link TMDS
164.439] (--) NVIDIA(0): DFP-1: 165.0 MHz maximum pixel clock
164.439] (--) NVIDIA(0): DFP-1: Internal Single Link TMDS
164.439] (--) NVIDIA(0): DFP-2: 330.0 MHz maximum pixel clock
164.439] (--) NVIDIA(0): DFP-2: Internal Single Link TMDS
164.439] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display
164.439] (**) NVIDIA(0): device Samsung SyncMaster (DFP-0) (Using EDID frequencies
164.439] (**) NVIDIA(0): has been enabled on all display devices.)
164.439] (WW) NVIDIA(GPU-0): The EDID for Samsung SyncMaster (DFP-0) contradicts itself:
164.439] (WW) NVIDIA(GPU-0): mode "1920x1080" is specified in the EDID; however, the
164.439] (WW) NVIDIA(GPU-0): EDID's valid VertRefresh range (56.000-60.000 Hz) would
164.439] (WW) NVIDIA(GPU-0): exclude this mode's VertRefresh (50.0 Hz); ignoring
164.439] (WW) NVIDIA(GPU-0): VertRefresh check for mode "1920x1080".
164.439] (WW) NVIDIA(GPU-0): The EDID for Samsung SyncMaster (DFP-0) contradicts itself:
164.439] (WW) NVIDIA(GPU-0): mode "1280x720" is specified in the EDID; however, the
164.439] (WW) NVIDIA(GPU-0): EDID's valid VertRefresh range (56.000-60.000 Hz) would
164.439] (WW) NVIDIA(GPU-0): exclude this mode's VertRefresh (50.0 Hz); ignoring
164.439] (WW) NVIDIA(GPU-0): VertRefresh check for mode "1280x720".
164.439] (WW) NVIDIA(GPU-0): The EDID for Samsung SyncMaster (DFP-0) contradicts itself:
164.439] (WW) NVIDIA(GPU-0): mode "720x576" is specified in the EDID; however, the
164.439] (WW) NVIDIA(GPU-0): EDID's valid VertRefresh range (56.000-60.000 Hz) would
164.439] (WW) NVIDIA(GPU-0): exclude this mode's VertRefresh (50.0 Hz); ignoring
164.439] (WW) NVIDIA(GPU-0): VertRefresh check for mode "720x576".
164.440] (==) NVIDIA(0):
164.440] (==) NVIDIA(0): No modes were requested; the default mode "nvidia-auto-select"
164.440] (==) NVIDIA(0): will be used as the requested mode.
164.440] (==) NVIDIA(0):
164.440] (II) NVIDIA(0): Validated MetaModes:
164.440] (II) NVIDIA(0): "DFP-0:nvidia-auto-select"
164.440] (II) NVIDIA(0): Virtual screen size determined to be 1920 x 1080
164.463] (--) NVIDIA(0): DPI set to (92, 91); computed from "UseEdidDpi" X config
164.463] (--) NVIDIA(0): option
164.463] (==) intel(G0): Depth 24, (--) framebuffer bpp 32
164.463] (==) intel(G0): RGB weight 888
164.463] (==) intel(G0): Default visual is TrueColor
164.463] (--) intel(G0): Integrated Graphics Chipset: Intel(R) HD Graphics 3000
164.463] (--) intel(G0): CPU: x86-64, sse2, sse3, ssse3, sse4.1, sse4.2, avx
164.463] (**) intel(G0): Framebuffer tiled
164.463] (**) intel(G0): Pixmaps tiled
164.463] (**) intel(G0): "Tear free" disabled
164.463] (**) intel(G0): Forcing per-crtc-pixmaps? no
164.463] (II) intel(G0): Output VGA1 has no monitor section
164.463] (II) intel(G0): Output HDMI1 has no monitor section
164.463] (II) intel(G0): Output DP1 has no monitor section
164.463] (II) intel(G0): Output VIRTUAL1 has no monitor section
164.463] (--) intel(G0): Output VGA1 using initial mode 1024x768 on pipe 0
While this is only a portion of the log, it is my impression that there is a problem being caused by some sort of contradiction relating to EDID. Does anyone have a suggestion how to correct this so that I have a normal 1920x1080p monitor? I note that at least one person had a similar problem, related to Ubuntu 12.04, as shown here: http://askubuntu.com/questions/163013/nvidia-the-edid-for-cndlcd-dfp-1-contradicts-itself