因此，我修改了 .conf 文件并添加了我的 NVIDIA 驱动程序（nvidia-440），但当我尝试 optirun 时它就是不起作用，所以我需要一些帮助，我有一台 Intel I7-7500U（HD 620）和一台 Geforce 920mx，我需要帮助查找日志文件来解决这个问题，谢谢。
optirun glxgears -info
[ 1036.915525] [ERROR]The Bumblebee daemon has not been started yet or the socket path /var/run/bumblebee.socket was incorrect.
[ 1036.915603] [ERROR]Could not connect to bumblebee daemon - is it running?
当我尝试查看 bumblebee.socket 以获取任何配置或帮助时：
sudo gedit /var/run/bumblebee.socket
此文件中没有文本或档案，并且它也不在路径中。安装 Bumble bee 时出现错误，存储库中出现 404 错误。感谢您的帮助。
bumblebee.conf 文件：
# Configuration file for Bumblebee. Values should **not** be put between quotes
## Server options. Any change made in this section will need a server restart
# to take effect.
[bumblebeed]
# The secondary Xorg server DISPLAY number
VirtualDisplay=:8
# Should the unused Xorg server be kept running? Set this to true if waiting
# for X to be ready is too long and don't need power management at all.
KeepUnusedXServer=false
# The name of the Bumbleblee server group name (GID name)
ServerGroup=bumblebee
# Card power state at exit. Set to false if the card shoud be ON when Bumblebee
# server exits.
TurnCardOffAtExit=false
# The default behavior of '-f' option on optirun. If set to "true", '-f' will
# be ignored.
NoEcoModeOverride=false
# The Driver used by Bumblebee server. If this value is not set (or empty),
# auto-detection is performed. The available drivers are nvidia and nouveau
# (See also the driver-specific sections below)
Driver=nvidia
# Directory with a dummy config file to pass as a -configdir to secondary X
XorgConfDir=/etc/bumblebee/xorg.conf.d
# Xorg binary to run
XorgBinary=/usr/lib/xorg/Xorg
## Client options. Will take effect on the next optirun executed.
[optirun]
# Acceleration/ rendering bridge, possible values are auto, virtualgl and
# primus.
Bridge=auto
# The method used for VirtualGL to transport frames between X servers.
# Possible values are proxy, jpeg, rgb, xv and yuv.
VGLTransport=proxy
# List of paths which are searched for the primus libGL.so.1 when using
# the primus bridge
PrimusLibraryPath=/usr/lib/x86_64-linux-gnu/primus:/usr/lib/i386-linux-gnu/primus
# Should the program run under optirun even if Bumblebee server or nvidia card
# is not available?
AllowFallbackToIGC=false
# Driver-specific settings are grouped under [driver-NAME]. The sections are
# parsed if the Driver setting in [bumblebeed] is set to NAME (or if auto-
# detection resolves to NAME).
# PMMethod: method to use for saving power by disabling the nvidia card, valid
# values are: auto - automatically detect which PM method to use
# bbswitch - new in BB 3, recommended if available
# switcheroo - vga_switcheroo method, use at your own risk
# none - disable PM completely
# https://github.com/Bumblebee-Project/Bumblebee/wiki/Comparison-of-PM-methods
## Section with nvidia driver specific options, only parsed if Driver=nvidia
[driver-nvidia]
# Module name to load, defaults to Driver if empty or unset
KernelDriver=nvidia-440
PMMethod=auto
# colon-separated path to the nvidia libraries
LibraryPath=/usr/lib/nvidia-440:/usr/lib32/nvidia-440:/usr/lib/x86_64-linux-gnu:/usr/lib/i386-linux-gnu
# comma-separated path of the directory containing nvidia_drv.so and the
# default Xorg modules path
XorgModulePath=/usr/lib/nvidia-440/xorg,/usr/lib/xorg/modules
XorgConfFile=/etc/bumblebee/xorg.conf.nvidia
# If set to true, will always unload the kernel module(s) even with
# PMMethod=none - useful for newer Optimus models on which the kernel power
# management works out of the box to power the card on/off without bbswitch.
AlwaysUnloadKernelDriver=false
## Section with nouveau driver specific options, only parsed if Driver=nouveau
[driver-nouveau]
KernelDriver=nouveau
PMMethod=auto
XorgConfFile=/etc/bumblebee/xorg.conf.nouveau
找到另一份日志，清楚地说明了发生了什么。
ago 20 12:52:21 joaopedro-300E5M-300E5L systemd[1]: bumblebeed.service: Failed with result 'exit-code'.
ago 20 12:53:21 joaopedro-300E5M-300E5L systemd[1]: bumblebeed.service: Scheduled restart job, restart counter is at 32.
ago 20 12:53:21 joaopedro-300E5M-300E5L systemd[1]: Stopped Bumblebee C Daemon.
ago 20 12:53:21 joaopedro-300E5M-300E5L systemd[1]: Started Bumblebee C Daemon.
ago 20 12:53:21 joaopedro-300E5M-300E5L bumblebeed[6828]: libkmod: ERROR ../libkmod/libkmod-config.c:656 kmod_config_parse: /etc/modprobe.d/vfio.conf line 2: ignoring bad line starting with 'hostpci0:'
ago 20 12:53:21 joaopedro-300E5M-300E5L bumblebeed[6828]: [ 1964.180935] [WARN]No switching method available. The dedicated card will always be on.
ago 20 12:53:21 joaopedro-300E5M-300E5L bumblebeed[6828]: [ 1964.181229] [ERROR]Module 'nvidia-440' is not found.
ago 20 12:53:21 joaopedro-300E5M-300E5L systemd[1]: bumblebeed.service: Main process exited, code=exited, status=1/FAILURE
ago 20 12:53:21 joaopedro-300E5M-300E5L systemd[1]: bumblebeed.service: Failed with result 'exit-code'.
将 nvidia-440 换成 nvidia，重新启动服务，现在又出现另一个错误：
bumblebeed.service - Bumblebee C Daemon
Loaded: loaded (/lib/systemd/system/bumblebeed.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2020-08-20 12:58:43 -03; 1min 44s ago
Main PID: 7048 (bumblebeed)
Tasks: 1 (limit: 9373)
Memory: 624.0K
CGroup: /system.slice/bumblebeed.service
└─7048 /usr/sbin/bumblebeed
ago 20 12:58:43 joaopedro-300E5M-300E5L systemd[1]: Started Bumblebee C Daemon.
ago 20 12:58:43 joaopedro-300E5M-300E5L bumblebeed[7048]: libkmod: ERROR ../libkmod/libkmod-config.c:656 kmod_config_parse: /etc/modprobe.d/vfio.conf line 2: ignoring bad line starting with 'hostpci0:'
ago 20 12:58:43 joaopedro-300E5M-300E5L bumblebeed[7048]: [ 2286.122440] [WARN]No switching method available. The dedicated card will always be on.
ago 20 12:58:43 joaopedro-300E5M-300E5L bumblebeed[7048]: [ 2286.122639] [INFO]/usr/sbin/bumblebeed 3.2.1 started
ago 20 12:58:45 joaopedro-300E5M-300E5L bumblebeed[7048]: libkmod: ERROR ../libkmod/libkmod-module.c:838 kmod_module_insert_module: could not find module by name='off'
ago 20 12:58:45 joaopedro-300E5M-300E5L bumblebeed[7048]: [ 2288.249844] [ERROR]Could not load GPU driver
在本帖的帮助下修复了这个问题： 大黄蜂在 Ubuntu 18.04 上无法运行