我有一台新的 Debian 机器，我正在尝试为其连接第二台显示器。当我将其插入 HDMI 端口时，第二台显示器会复制第一台显示器，而我想扩展它。
我的机器是 Dell Inspiron 灵越 15 7537 (http://www.dell.com/uk/p/inspiron-15-7537/pd）。
为了提供一些详细信息，输出uname -a是
Linux marcoshstudio 3.16-0.bpo.3-amd64 #1 SMP Debian 3.16.5-1~bpo70+1 (2014-11-02) x86_64 GNU/Linux
的输出lspci -nn是
00:00.0 Host bridge [0600]: Intel Corporation Haswell-ULT DRAM Controller [8086:0a04] (rev 0b)
00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b)
00:03.0 Audio device [0403]: Intel Corporation Device [8086:0a0c] (rev 0b)
00:14.0 USB controller [0c03]: Intel Corporation Lynx Point-LP USB xHCI HC [8086:9c31] (rev 04)
00:16.0 Communication controller [0780]: Intel Corporation Lynx Point-LP HECI #0 [8086:9c3a] (rev 04)
00:1b.0 Audio device [0403]: Intel Corporation Lynx Point-LP HD Audio Controller [8086:9c20] (rev 04)
00:1c.0 PCI bridge [0604]: Intel Corporation Lynx Point-LP PCI Express Root Port 1 [8086:9c10] (rev e4)
00:1c.2 PCI bridge [0604]: Intel Corporation Lynx Point-LP PCI Express Root Port 3 [8086:9c14] (rev e4)
00:1c.3 PCI bridge [0604]: Intel Corporation Lynx Point-LP PCI Express Root Port 4 [8086:9c16] (rev e4)
00:1c.4 PCI bridge [0604]: Intel Corporation Lynx Point-LP PCI Express Root Port 5 [8086:9c18] (rev e4)
00:1d.0 USB controller [0c03]: Intel Corporation Lynx Point-LP USB EHCI #1 [8086:9c26] (rev 04)
00:1f.0 ISA bridge [0601]: Intel Corporation Lynx Point-LP LPC Controller [8086:9c43] (rev 04)
00:1f.2 SATA controller [0106]: Intel Corporation Lynx Point-LP SATA Controller 1 [AHCI mode] [8086:9c03] (rev 04)
00:1f.3 SMBus [0c05]: Intel Corporation Lynx Point-LP SMBus Controller [8086:9c22] (rev 04)
02:00.0 Network controller [0280]: Intel Corporation Device [8086:08b1] (rev 73)
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device [10ec:5287] (rev 01)
03:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 12)
04:00.0 3D controller [0302]: NVIDIA Corporation Device [10de:0fe4] (rev a1)
xrandr -q插入我的第二台显示器后，的输出是
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080
default connected 1920x1080+0+0 0mm x 0mm
1920x1080 0.0*
的输出lshw -c video是
*-display
description: VGA compatible controller
product: Haswell-ULT Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 0b
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:62 memory:e3000000-e33fffff memory:c0000000-cfffffff ioport:5000(size=64)
*-display
description: 3D controller
product: NVIDIA Corporation
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:04:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=nouveau latency=0
resources: irq:65 memory:e2000000-e2ffffff memory:d0000000-dfffffff memory:e0000000-e1ffffff ioport:3000(size=128)
我尝试过nvidia-detect，但输出是
No NVIDIA GPU detected.
您对我如何使用两个屏幕有任何提示或建议吗？
答案1
我不知道你的显示器名称是什么，所以适应这行代码。 xrandr --输出 (mon1) --left-of (mon2)
答案2
不要镜像 Windows，例如在 Ubuntu 中您可以使用显示配置 gui：
确保您的窗口设置没有：
选中镜像显示（注意：可能会限制分辨率选项），如下所示：
