在台式机上安装的 TW，Intel 核显 +nVidia 独显。电脑 bios 默认禁用了核显，之前一直使用 nVidia 显卡的开源驱动。今天在 bios 里面启用了核显，把核显设置为默认显卡，然后参考下面两篇教程安装配置了 bumblebee 让双显卡共存，当然 nVidia 显卡还是使用开源驱动。
https://en.opensuse.org/SDB:NVIDIA_Bumblebee
https://zh.opensuse.org/SDB:Bumblebee
重启后就悲剧了，显示屏完全没有信号输出，连开机时华硕的启动界面都不显示了。然而系统好像还是正常启动了，SSH 和 VNC 都可以连接。
求教各位大佬到底哪儿出了问题，怎么解决？
lspci | grep VGA 的输出
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)
01:00.0 VGA compatible controller: NVIDIA Corporation GK208B [GeForce GT 730] (rev a1)
systemctl status -l bumblebeed.service 的输出
bumblebeed.service - Bumblebee C Daemon
Loaded: loaded (/usr/lib/systemd/system/bumblebeed.service; enabled; vendor preset: disabled)
Active: active (running) since Wed 2019-11-27 16:31:42 CST; 4h 52min ago
Main PID: 1329 (bumblebeed)
Tasks: 1 (limit: 4915)
Memory: 1.2M
CGroup: /system.slice/bumblebeed.service
└─1329 /usr/sbin/bumblebeed
Nov 27 16:31:42 linux-suse systemd [1]: Started Bumblebee C Daemon.
Nov 27 16:31:42 linux-suse bumblebeed [1329]: modprobe: ERROR: could not insert 'bbswitch': No such device
Nov 27 16:31:42 linux-suse bumblebeed [1329]: [ 7.331695] [ERROR] Module bbswitch could not be loaded (timeout?)
Nov 27 16:31:42 linux-suse bumblebeed [1329]: [ 7.331709] [WARN] No switching method available. The dedicated card will always be on.
Nov 27 16:31:42 linux-suse bumblebeed [1329]: [ 7.333362] [INFO]/usr/sbin/bumblebeed 3.2.1 started
dmesg | grep -i bbswitch 的输出
[ 2.134295] bbswitch: loading out-of-tree module taints kernel.
[ 2.134422] bbswitch: version 0.8
[ 2.134427] bbswitch: Found integrated VGA device 0000:00:02.0: \_SB_.PCI0.GFX0
[ 2.134430] bbswitch: Found discrete VGA device 0000:01:00.0: \_SB_.PCI0.PEG0.PEGP
[ 2.134440] bbswitch: failed to evaluate \_SB_.PCI0.PEG0.PEGP._DSM {0xF8,0xD8,0x86,0xA4,0xDA,0x0B,0x1B,0x47,0xA7,0x2B,0x60,0x42,0xA6,0xB5,0xBE,0xE0} 0x100 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND
[ 2.134443] bbswitch: failed to evaluate \_SB_.PCI0.PEG0.PEGP._DSM {0xA0,0xA0,0x95,0x9D,0x60,0x00,0x48,0x4D,0xB3,0x4D,0x7E,0x5F,0xEA,0x12,0x9F,0xD4} 0x102 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND
[ 2.134451] bbswitch: failed to evaluate \_SB_.PCI0.GFX0._DSM {0xA0,0xA0,0x95,0x9D,0x60,0x00,0x48,0x4D,0xB3,0x4D,0x7E,0x5F,0xEA,0x12,0x9F,0xD4} 0x102 0x0 {0x00,0x00,0x00,0x00}: AE_NOT_FOUND
[ 2.134451] bbswitch: No suitable _DSM call found.
hwinfo的输出如下，看起来 N 卡驱动没有启用，执行命令modprobe nouveau后显示器显示黑屏，不过出现了一个能动的鼠标图标，按 ctrl+alt+f1 字符界面可以正常显示
20: PCI 100.0: 0300 VGA compatible controller (VGA)
[Created at pci.386]
Unique ID: VCu0.DZHfJZXqByE
Parent ID: vSkL.xltNQFyR_DB
SysFS ID: /devices/pci0000:00/0000:00:01.0/0000:01:00.0
SysFS BusID: 0000:01:00.0
Hardware Class: graphics card
Model: "nVidia GK208B [GeForce GT 730]"
Vendor: pci 0x10de "nVidia Corporation"
Device: pci 0x1287 "GK208B [GeForce GT 730]"
SubVendor: pci 0x1043 "ASUSTeK Computer Inc."
SubDevice: pci 0x84f7
Revision: 0xa1
Memory Range: 0xf6000000-0xf6ffffff (rw,non-prefetchable,disabled)
Memory Range: 0xe0000000-0xe7ffffff (ro,non-prefetchable,disabled)
Memory Range: 0xe8000000-0xe9ffffff (ro,non-prefetchable,disabled)
I/O Ports: 0xe000-0xefff (rw,disabled)
Memory Range: 0xf7000000-0xf707ffff (ro,non-prefetchable,disabled)
IRQ: 11 (no events)
Module Alias: "pci:v000010DEd00001287sv00001043sd000084F7bc03sc00i00"
Driver Info #0:
Driver Status: nouveau is not active
Driver Activation Cmd: "modprobe nouveau"
Config Status: cfg=no, avail=yes, need=no, active=unknown
Attached to: #18 (PCI bridge)
28: PCI 02.0: 0300 VGA compatible controller (VGA)
[Created at pci.386]
Unique ID: _Znp.TQCTzyzKETC
SysFS ID: /devices/pci0000:00/0000:00:02.0
SysFS BusID: 0000:00:02.0
Hardware Class: graphics card
Device Name: "Onboard IGD"
Model: "Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller"
Vendor: pci 0x8086 "Intel Corporation"
Device: pci 0x0412 "Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller"
SubVendor: pci 0x1043 "ASUSTeK Computer Inc."
SubDevice: pci 0x8534
Revision: 0x06
Driver: "i915"
Driver Modules: "i915"
Memory Range: 0xf7400000-0xf77fffff (rw,non-prefetchable)
Memory Range: 0xd0000000-0xdfffffff (ro,non-prefetchable)
I/O Ports: 0xf000-0xf03f (rw)
Memory Range: 0x000c0000-0x000dffff (rw,non-prefetchable,disabled)
IRQ: 29 (2497 events)
Module Alias: "pci:v00008086d00000412sv00001043sd00008534bc03sc00i00"
Driver Info #0:
Driver Status: i915 is active
Driver Activation Cmd: "modprobe i915"
Config Status: cfg=no, avail=yes, need=no, active=unknown
首先检查一下显示器接线？如果你之前一直接在独显上现在有可能从主板走核显输出了
edit:
没看到下面回帖，已经能看到鼠标了那肯定线是对的，这个描述有点像 x 启动的问题，看看 /var/log/Xorg.0.log 的内容吧
解决了，核显和集显用的不是一个 VGA 输出接口，换个接口就搞定了
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