我有一个客户使用 CLI 中的 Ubuntu 16.04 - 没有 GUI。他们有 2 个视频卡，都带有视频输出端口。
我如何告诉 Ubuntu 使用哪张卡作为主要视频输出？
系统在 POST 期间启动并显示视频，但进入 Ubuntu 时屏幕变黑。
我可以通过 SSH 进入机器；nouveau 被列入黑名单，并且只有 nvidia 驱动程序在运行：
root@ubuntu16:~# lsmod |grep -i nouv
root@ubuntu16:~# lsmod |grep -i nvi
nvidia_drm 45056 0
nvidia_modeset 765952 1 nvidia_drm
nvidia 11476992 1 nvidia_modeset
drm_kms_helper 147456 1 nvidia_drm
drm 364544 3 drm_kms_helper,nvidia_drm
root@ubuntu16:~# modinfo nvidia
filename: /lib/modules/4.4.0-34-generic/kernel/drivers/video/nvidia.ko
alias: char-major-195-*
version: 367.44
supported: external
license: NVIDIA
srcversion: 62594DC43B355E37A82EB4C
alias: pci:v000010DEd00000E00sv*sd*bc04sc80i00*
alias: pci:v000010DEd*sv*sd*bc03sc02i00*
alias: pci:v000010DEd*sv*sd*bc03sc00i00*
depends:
vermagic: 4.4.0-34-generic SMP mod_unload modversions
parm: NVreg_Mobile:int
parm: NVreg_ResmanDebugLevel:int
parm: NVreg_RmLogonRC:int
parm: NVreg_ModifyDeviceFiles:int
parm: NVreg_DeviceFileUID:int
parm: NVreg_DeviceFileGID:int
parm: NVreg_DeviceFileMode:int
parm: NVreg_UpdateMemoryTypes:int
parm: NVreg_InitializeSystemMemoryAllocations:int
parm: NVreg_UsePageAttributeTable:int
parm: NVreg_MapRegistersEarly:int
parm: NVreg_RegisterForACPIEvents:int
parm: NVreg_CheckPCIConfigSpace:int
parm: NVreg_EnablePCIeGen3:int
parm: NVreg_EnableMSI:int
parm: NVreg_TCEBypassMode:int
parm: NVreg_UseThreadedInterrupts:int
parm: NVreg_MemoryPoolSize:int
parm: NVreg_RegistryDwords:charp
parm: NVreg_RmMsg:charp
parm: NVreg_AssignGpus:charp
root@ubuntu16:~#
root@ubuntu16:/var/log# nvidia-smi
Wed Aug 24 16:50:52 2016
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 367.44 Driver Version: 367.44 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GT 710 Off | 0000:02:00.0 N/A | N/A |
| 40% 29C P0 N/A / N/A | 0MiB / 2000MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce GTX 1080 Off | 0000:81:00.0 Off | N/A |
| 0% 39C P0 41W / 180W | 0MiB / 8113MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 Not Supported |
+-----------------------------------------------------------------------------+
root@ubuntu16:/var/log#
这看起来应该很简单，但我找不到足够的文档。请帮帮我。