我正在嘗試將兩個顯示器連接到我的 Ubuntu 14.04.3 桌面。我的第一台顯示器透過 RS-232 連接線連接到 CPU，並且已啟動並運行。第二個顯示器連接到顯示鏈路轉接器，其另一端是與 CPU 的 USB 連接。當我啟動時，我在第二個顯示器上看到一些啟動訊息，但是當第一個顯示器的登入載入時，一旦我登入第一個顯示器，第二個顯示器就會崩潰。
這些是我的規格：
foo@bar ~ $ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty
foo@bar ~ $ uname -r
3.16.0-50-generic
foo@bar ~ $
foo@bar ~ $ lsusb
Bus 002 Device 003: ID 046d:c05a Logitech, Inc. M90/M100 Optical Mouse
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 413c:2107 Dell Computer Corp.
Bus 003 Device 004: ID 17e9:019a DisplayLink
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
foo@bar ~ $
foo@bar ~ $ xrandr --query
Screen 0: minimum 8 x 8, current 1920 x 1200, maximum 16384 x 16384
DVI-I-0 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
1920x1200 60.0*+
1920x1080 60.0
1680x1050 60.0
1600x1200 60.0
1280x1024 60.0
1280x960 60.0
1024x768 60.0
800x600 60.3
640x480 59.9
DVI-I-1 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
~ $ lspci -vnn | grep -i VGA -A 12
02:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GL [Quadro K600] [10de:0ffa] (rev a1) (prog-if 00 [VGA controller])
Subsystem: NVIDIA Corporation Device [10de:094b]
Flags: bus master, fast devsel, latency 0, IRQ 82
Memory at fa000000 (32-bit, non-prefetchable) [size=16M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
Memory at f0000000 (64-bit, prefetchable) [size=32M]
I/O ports at e000 [size=128]
[virtual] Expansion ROM at fb000000 [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: nvidia
02:00.1 Audio device [0403]: NVIDIA Corporation GK107 HDMI Audio Controller [10de:0e1b] (rev a1)
Subsystem: NVIDIA Corporation Device [10de:094b]
~ $ sudo lshw -C video
*-display
description: VGA compatible controller
product: GK107GL [Quadro K600]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:02:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:82 memory:fa000000-faffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:fb000000-fb07ffff
我嘗試過各種關於讓第二台顯示器工作的帖子，但沒有一個起作用。我還嘗試將第二台顯示器切換為直接使用 RS32 電纜，同時將第一台顯示器連接到顯示連結適配器，這導致第二台顯示器開始工作，並且第一個顯示器顯示黑屏。設定中的檢測顯示也不起作用。
答案1
我能夠使用 DVI 轉 Display 連接線和轉接器（而不是 DisplayLink USB 轉接器）讓兩台顯示器正常運作。我還將我的 Ubuntu 升級到了最新版本。我非常確定 DisplayLink 適配器的問題。