1 前言

一个问题，一篇文章，一出故事。
笔者台式机是集成显卡，为了接多台显示器于是加装了一张NVIDIA显卡，为了实现屏幕扩展，笔者尝试使用Bumblebee服务实现。

2 最佳实践

2.1 安装Bumblebee

apt install bumblebee bumblebee-nvidia

2.2 检查Bumblebee服务

systemctl status bumblebeed.service

正常可见如下显示，

● bumblebeed.service - Bumblebee C Daemon
     Loaded: loaded (/lib/systemd/system/bumblebeed.service; enabled; preset: enabled)
     Active: active (running) since Fri 2023-09-08 21:24:23 CST; 2min 58s ago
   Main PID: 643 (bumblebeed)
      Tasks: 1 (limit: 14177)
     Memory: 1.3M
        CPU: 10ms
     CGroup: /system.slice/bumblebeed.service
             └─643 /usr/sbin/bumblebeed

Sep 08 21:24:23 30-0001-21164.sae.com.hk systemd[1]: Started bumblebeed.service - Bumblebee C Daemon.
Sep 08 21:24:31 30-0001-21164.sae.com.hk bumblebeed[643]: [   20.332111] [WARN]No switching method available. The >
Sep 08 21:24:31 30-0001-21164.sae.com.hk bumblebeed[643]: [   20.332570] [INFO]/usr/sbin/bumblebeed 3.2.1 started

服务能正常启动的情况下，如果使用如下命令查看显示设备，

lspci | grep VGA

则可见两个VGA设备，

00:02.0 VGA compatible controller: Intel Corporation 4th Generation Core Processor Family Integrated Graphics Controller (rev 06)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 430] (rev a1)

另外一种情况，如果服务器显示如下异常信息，

● bumblebeed.service - Bumblebee C Daemon
     Loaded: loaded (/lib/systemd/system/bumblebeed.service; enabled; preset: enabled)
     Active: activating (auto-restart) (Result: exit-code) since Fri 2023-09-08 21:12:51 CST; 30s ago
    Process: 2468 ExecStart=/usr/sbin/bumblebeed (code=exited, status=1/FAILURE)
   Main PID: 2468 (code=exited, status=1/FAILURE)
        CPU: 4ms

如果你使用手动方式执行如下命令启动，

/usr/sbin/bumblebeed

则可见如下错误，

[  407.037529] [ERROR]No integrated video card found, quitting.

此时如果你使用如下命令检查VGA设备，

lspci | grep VGA

则你会发现系统只检查到一个VGA设备，

01:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 430] (rev a1)

注：此时你可能需要检查连接线，并重新启动你的操作系统

2.3 测试Bumblebee服务

optirun glxgears

双显示器此时会正常显示，但可能会见到如下错误提示，

[ 3045.161964] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) Unable to locate/open config directory: "/etc/bumblebee/xorg.conf.d"

[ 3045.161996] [ERROR]Aborting because fallback start is disabled.

如果遇到以上错误，你可以尝试使用如下命令，

vim /etc/bumblebee/bumblebee.conf

修改如下参数，

Driver=nouveau

然后重新启动服务使用配置生效，

systemctl restart bumblebeed.service

2.4 自动启动双显示器

echo '/usr/bin/optirun glxgears &> /dev/null' >> /etc/gdm3/PreSession/Default

参阅文档
======================

官方资料
—————-
https://github.com/Bumblebee-Project/Bumblebee

系统供应商的配置方法
———————-
https://wiki.archlinux.org/title/bumblebee

非官方资料
—————-
https://superuser.com/questions/1082617/bumblebee-with-hdmi-on-nvidia-make-usable-both-with-without-connected-monitor
https://askubuntu.com/questions/863696/bumblebee-errorcannot-access-secondary-gpu-error-xorg-ee
http://www.taodudu.cc/news/show-5539301.html?action=onClick
https://www.jianshu.com/p/05e0c82e3e62
https://www.mryunwei.com/321873.html
https://forums.debiancn.org/t/topic/1615/2