Server and monitor disagree about mode

[John F Carr]

Xorg on FreeBSD thinks it is setting 2560x1440, but my NEC PA272W monitor reports 1280x1440 at 60 and uses only half the screen width.  The compressed display is unusuable.

Any ideas?

The monitor works with a mid-2011 Mac Mini at 2560x1440 at 30.

It used to work with xorg until FreeBSD updated X server code last last year.  I don’t remember what refresh rate was used then. The log below is from NVIDIA, but ATI fails more or less the same way.  I just updated to the latest NVIDIA drivers and it’s still broken.

I tried a different cable with no change in behavior.  I didn’t try a gold-plated Monster cable.

My guess is it assumes I want 2560x1440 at 60 and fails oddly when it can’t go that fast.  I’m content with 30 Hz, if that’s the only problem.


[1688024.084] (II) NVIDIA(0): NVIDIA GPU GeForce GTX 750 Ti (GM107-A) at PCI:6:0:0 (GPU-0)
[1688024.084] (--) NVIDIA(0): Memory: 2097152 kBytes
[1688024.084] (--) NVIDIA(0): VideoBIOS: 82.07.32.00.50
[1688024.084] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[1688024.098] (--) NVIDIA(0): Valid display device(s) on GeForce GTX 750 Ti at PCI:6:0:0
[1688024.098] (--) NVIDIA(0):     CRT-0
[1688024.098] (--) NVIDIA(0):     NEC PA272W (DFP-0) (boot, connected)
[1688024.098] (--) NVIDIA(0):     DFP-1
[1688024.098] (--) NVIDIA(0):     DFP-2
[1688024.098] (--) NVIDIA(0):     DFP-3
[1688024.098] (--) NVIDIA(GPU-0): CRT-0: 400.0 MHz maximum pixel clock
[1688024.098] (--) NVIDIA(0): NEC PA272W (DFP-0): Internal TMDS
[1688024.098] (--) NVIDIA(GPU-0): NEC PA272W (DFP-0): 330.0 MHz maximum pixel clock
[1688024.098] (--) NVIDIA(0): DFP-1: Internal TMDS
[1688024.098] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[1688024.098] (--) NVIDIA(0): DFP-2: Internal TMDS
[1688024.098] (--) NVIDIA(GPU-0): DFP-2: 165.0 MHz maximum pixel clock
[1688024.098] (--) NVIDIA(0): DFP-3: Internal DisplayPort
[1688024.098] (--) NVIDIA(GPU-0): DFP-3: 960.0 MHz maximum pixel clock
[1688024.098] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display
[1688024.098] (**) NVIDIA(0):     device NEC PA272W (DFP-0) (Using EDID frequencies has been
[1688024.098] (**) NVIDIA(0):     enabled on all display devices.)
[1688024.100] (==) NVIDIA(0): 
[1688024.100] (==) NVIDIA(0): No modes were requested; the default mode "nvidia-auto-select"
[1688024.100] (==) NVIDIA(0):     will be used as the requested mode.
[1688024.100] (==) NVIDIA(0): 
[1688024.100] (II) NVIDIA(0): Validated MetaModes:
[1688024.100] (II) NVIDIA(0):     "DFP-0:nvidia-auto-select"
[1688024.100] (II) NVIDIA(0): Virtual screen size determined to be 2560 x 1440
[1688024.123] (--) NVIDIA(0): DPI set to (108, 107); computed from "UseEdidDpi" X config
[1688024.123] (--) NVIDIA(0):     option
[1688024.123] (--) Depth 24 pixmap format is 32 bpp
[1688024.123] (II) NVIDIA: Reserving 3072.00 MB of virtual memory for indirect memory
[1688024.123] (II) NVIDIA:     access.
[1688024.139] (II) NVIDIA(0): Setting mode "DFP-0:nvidia-auto-select"
[1688024.199] Loading extension NV-GLX
[1688024.215] (==) NVIDIA(0): Disabling shared memory pixmaps
[1688024.215] (==) NVIDIA(0): Backing store disabled