我有 2 台 2560x1440 显示器 (HP ZR2740w) 和一块 GeForce GT610 显卡，带有两个双 DVI 输出和 1GB RAM。我可以在任一屏幕上获得全分辨率，而在另一个屏幕上获得 1/4 分辨率，但不能在两个屏幕上都获得全分辨率。
当我使用 nvidia-settings 时，问题似乎可以追溯到第二个 DVI 端口 (DFP-1) 上的“连接链路：单”。我尝试过交换卡上的连接，结果就是交换了具有全分辨率的显示器。因此，问题不可能出在显示器或 DVI 电缆上。
这是“由于您的显卡不支持两个双 DVI 连接，所以您输了”的情况吗？还是我遗漏了什么？
我在下面发布了各种诊断的输出。
-约翰
2:33PM humpty-6: xrandr
Screen 0: minimum 8 x 8, current 3280 x 1440, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
DVI-I-2 connected 2560x1440+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
2560x1440 60.0*+
1280x720 59.9
DVI-I-3 connected 720x1280+2560+160 left (normal left inverted right x axis y axis) 597mm x 336mm
1280x720 59.9*+
HDMI-0 disconnected (normal left inverted right x axis y axis)
Portions of /var/log/Xorg.0.log
[ 10.041] (II) NVIDIA GLX Module 304.116 Mon Oct 28 20:59:08 PDT 2013
[ 10.041] Loading extension GLX
[ 10.041] (==) Matched nvidia as autoconfigured driver 0
[ 10.041] (==) Matched nouveau as autoconfigured driver 1
[ 10.041] (II) LoadModule: "nvidia"
[ 10.041] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so
[ 10.057] (II) Module nvidia: vendor="NVIDIA Corporation"
[ 10.072] (II) NVIDIA dlloader X Driver 304.116 Mon Oct 28 20:40:38 PDT 2013
[ 10.072] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 10.086] (II) NVIDIA(0): Creating default Display subsection in Screen section
"Default Screen Section" for depth/fbbpp 24/32
[ 10.086] (==) NVIDIA(0): Depth 24, (==) framebuffer bpp 32
[ 10.086] (==) NVIDIA(0): RGB weight 888
[ 10.086] (==) NVIDIA(0): Default visual is TrueColor
[ 10.086] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
[ 10.086] (**) NVIDIA(0): Option "NoLogo" "True"
[ 10.086] (**) NVIDIA(0): Enabling 2D acceleration
[ 10.970] (II) NVIDIA(GPU-0): Display (HP ZR2740w (DFP-0)) does not support NVIDIA 3D Vision
[ 10.970] (II) NVIDIA(GPU-0): stereo.
[ 10.981] (II) NVIDIA(GPU-0): Display (HP ZR2740w (DFP-1)) does not support NVIDIA 3D Vision
[ 10.981] (II) NVIDIA(GPU-0): stereo.
[ 10.983] (II) NVIDIA(0): NVIDIA GPU GeForce GT 610 (GF119) at PCI:7:0:0 (GPU-0)
[ 10.983] (--) NVIDIA(0): Memory: 1048576 kBytes
[ 10.983] (--) NVIDIA(0): VideoBIOS: 75.19.55.00.12
[ 10.983] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[ 10.983] (--) NVIDIA(0): Interlaced video modes are supported on this GPU
[ 10.989] (--) NVIDIA(0): Valid display device(s) on GeForce GT 610 at PCI:7:0:0
[ 10.989] (--) NVIDIA(0): CRT-0
[ 10.989] (--) NVIDIA(0): CRT-1
[ 10.989] (--) NVIDIA(0): HP ZR2740w (DFP-0) (connected)
[ 10.989] (--) NVIDIA(0): HP ZR2740w (DFP-1) (connected)
[ 10.989] (--) NVIDIA(0): DFP-2
[ 10.989] (--) NVIDIA(0): CRT-0: 400.0 MHz maximum pixel clock
[ 10.989] (--) NVIDIA(0): CRT-1: 400.0 MHz maximum pixel clock
[ 10.989] (--) NVIDIA(0): HP ZR2740w (DFP-0): 330.0 MHz maximum pixel clock
[ 10.989] (--) NVIDIA(0): HP ZR2740w (DFP-0): Internal Dual Link TMDS
[ 10.989] (--) NVIDIA(0): HP ZR2740w (DFP-1): 165.0 MHz maximum pixel clock
[ 10.989] (--) NVIDIA(0): HP ZR2740w (DFP-1): Internal Single Link TMDS
[ 10.989] (--) NVIDIA(0): DFP-2: 165.0 MHz maximum pixel clock
[ 10.989] (--) NVIDIA(0): DFP-2: Internal Single Link TMDS
[ 10.989] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display
[ 10.989] (**) NVIDIA(0): device HP ZR2740w (DFP-0) (Using EDID frequencies has been
[ 10.989] (**) NVIDIA(0): enabled on all display devices.)
[ 10.989] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display
[ 10.989] (**) NVIDIA(0): device HP ZR2740w (DFP-1) (Using EDID frequencies has been
[ 10.989] (**) NVIDIA(0): enabled on all display devices.)
[ 10.989] (==) NVIDIA(0):
[ 10.989] (==) NVIDIA(0): No modes were requested; the default mode "nvidia-auto-select"
[ 10.989] (==) NVIDIA(0): will be used as the requested mode.
[ 10.989] (==) NVIDIA(0):
[ 10.989] (II) NVIDIA(0): Validated MetaModes:
[ 10.989] (II) NVIDIA(0): "DFP-0:nvidia-auto-select,DFP-1:nvidia-auto-select"
[ 10.989] (II) NVIDIA(0): Virtual screen size determined to be 3840 x 1440
[ 11.024] (--) NVIDIA(0): DPI set to (108, 107); computed from "UseEdidDpi" X config
[ 11.024] (--) NVIDIA(0): option
[ 11.025] (--) Depth 24 pixmap format is 32 bpp
[ 11.025] (II) NVIDIA: Using 3072.00 MB of virtual memory for indirect memory
[ 11.025] (II) NVIDIA: access.
[ 11.033] (II) NVIDIA(0): Setting mode "DFP-0:nvidia-auto-select,DFP-1:nvidia-auto-select"
[ 11.076] Loading extension NV-GLX
[ 11.127] (==) NVIDIA(0): Disabling shared memory pixmaps
[ 11.127] (==) NVIDIA(0): Backing store disabled
[ 11.127] (==) NVIDIA(0): Silken mouse enabled
[ 11.128] (==) NVIDIA(0): DPMS enabled
[ 11.128] Loading extension NV-CONTROL
[ 11.129] Loading extension XINERAMA
[ 11.129] (II) Loading sub module "dri2"
[ 11.129] (II) LoadModule: "dri2"
[ 11.129] (II) Module "dri2" already built-in
[ 11.129] (II) NVIDIA(0): [DRI2] Setup complete
[ 11.129] (II) NVIDIA(0): [DRI2] VDPAU driver: nvidia
[ 11.129] (--) RandR disabled
答案1
问题出在你的显卡上。它只能处理 1 个全分辨率的双链路 DVI，第二个是单链路 DVI。1 GB 或 RAM 不足以在 2 个显示器上推动 2560x1440。这就是为什么你只能在 1 个显示器上使用它。该卡可以很好地驱动 2 个 1920*1080 的显示器，但你无法获得 2 个 2560*1440 的显示器。
2*(1920*1080)= 4,147,200 正常设置下可以做到
1*(2560*1600) = 4,096,000（这是该卡的最大值）
1.25*(2560*1440) =4,608,000 这就是您在设置上看到的。这对于您的卡来说太多了。
您的卡无法支持最大分辨率的 2 台显示器，并且您在网站和购买网站上查找的规格表也没有充分解释这一点。
问题。