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List:       freedesktop-xorg
Subject:    Server and monitor disagree about mode
From:       John F Carr <jfc () mit ! edu>
Date:       2015-05-25 21:03:24
Message-ID: E9C59346-7266-4D2C-9BFB-0D715BB46239 () exchange ! mit ! edu
[Download RAW message or body]

Xorg on FreeBSD thinks it is setting 2560x1440, but my NEC PA272W monitor reports \
1280x1440@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@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@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

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