我是 Linux 菜鸟。自从从 Bionic 升级到 Focal 后,我支持多台显示器的能力实际上已经消失了。我见过类似的问题,但我还没有找到可行的解决方案。系统信息和 Xrandr 输出如下
- HP Revolve 810 G1 合盖
- 英特尔酷睿 i5-3437U CPU @ 1.90GHz
- 2 台戴尔 U2415 显示器连接到带有 2 个 DP 输出的 HP 超薄扩展坞(我相信它们是 DP 1.2)
- 英特尔® 高清显卡 4000 (IVB GT2)
- Ubuntu 20.04.1 LTS
- GNOME 3.36.3 X11
- X.Org 版本 1.20.8
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
DeviceName: 64
Subsystem: Hewlett-Packard Company 3rd Gen Core processor Graphics Controller
Kernel driver in use: i915
Kernel modules: i915
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 16384 x 16384
LV-DS-1 connected (normal left inverted right x axis y axis)
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
1920x1200 59.95*+
HDMI-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
1920x1080 60.00
DP-3 disconnected (normal left inverted right x axis y axis)
*-display
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:32 memory:d0000000-d03fffff memory:c0000000-cfffffff ioport:2000(size=64) memory:c0000-dffff
似乎对 DP-2 有所了解,但无论我如何连接电缆或使用哪种电缆(直接连接到基座、连接到笔记本电脑的内置 DP 输出或菊花链式连接),都没有任何变化,我的第二台显示器是黑色的。
我知道它支持多台显示器,因为当我打开盖子时,我可以看到多台显示器(LVDS 和 DP-1)。如果有更多信息或我需要采取的故障排除步骤,请告诉我。