Nvidia 346.35是从ppa:xorg-edgers/ppa安装的，第一次安装的时候，一切都正常，后来更新了内核后，重启就黑屏了。sudo apt-get purge nvidia*和sudo apt-get autoremove后，再重新安装nvidia 346驱动，还是黑屏。目前只能sudo prime-select intel，切换intel驱动使用。但我很想使用N卡驱动啊，请问高手有什么解决办法吗？

把下面指令 複製 貼進終端機 執行
1-1. uname -r
1-2. sudo lshw -numeric -class video
把結果直接 選取/複製 貼上來
不必擷圖

uname -r
3.13.0-45-generic

sudo lshw -numeric -class video
*-display
description: 3D controller
product: GF117M [GeForce 610M/710M/820M / GT 620M/625M/630M/720M] [10DE:1140]
vendor: NVIDIA Corporation [10DE]
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=nouveau latency=0
resources: irq:49 memory:f0000000-f0ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:6000(size=128)
*-display
description: VGA compatible controller
product: 4th Gen Core Processor Integrated Graphics Controller [8086:416]
vendor: Intel Corporation [8086]
physical id: 2
bus info: pci@0000:00:02.0
version: 06
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:46 memory:f1000000-f13fffff memory:e0000000-efffffff ioport:7000(size=64)
谢了。

1. 目前作用中的驅動 開源驅動 nouveau
2. http://nouveau.freedesktop.org/wiki/CodeNames/
GF117M 不在支援名單內

3. 顯然 你的 閉源驅動 還沒安裝完成
3-1. https://help.ubuntu.com/community/NvidiaManual
3-2. http://us.download.nvidia.com/XFree86/L ... index.html

我重装了nvidia 346驱动，重启后还是黑屏，sudo lshw -numeric -class video显示的是这样的结果：
*-display
description: 3D controller
product: GF117M [GeForce 610M/710M/820M / GT 620M/625M/630M/720M] [10DE:1140]
vendor: NVIDIA Corporation [10DE]
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=nvidia latency=0
resources: irq:49 memory:f0000000-f0ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:6000(size=128)
*-display
description: VGA compatible controller
product: 4th Gen Core Processor Integrated Graphics Controller [8086:416]
vendor: Intel Corporation [8086]
physical id: 2
bus info: pci@0000:00:02.0
version: 06
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:45 memory:f1000000-f13fffff memory:e0000000-efffffff ioport:7000(size=64)

1. 已改為 閉源驅動 nvidia
1-1. 把下面指令 複製 貼進終端機 執行
nvidia-settings --glxinfo | grep "OpenGL version string"
可以看到 閉源驅動 nvidia 版本

2. http://packages.ubuntu.com/trusty-updat ... 45-generic
trusty-updates: 提供的套件

3. Intel 提供的 開源開源驅動/配套程式套件 安裝程式 1.0.6 版
https://01.org/linuxgraphics/downloads/ ... .0.6-linux
https://01.org/linuxgraphics/downloads/ ... ck-release
可以額外安裝更多支援的程式 特別是 3D 支援 可以補 i915 的不足

4. https://wiki.ubuntu.com/RecoveryMode
看看 能否登入 Recovery Mode
目的 確認黑屏是否是 驅動還未正常工作/設定 引起的

经过几天的Google，找到了这篇文章，终于解决问题了。http://vxlabs.com/2015/02/05/solving-the-ubuntu-14-04-nvidia-346-nvidia-prime-black-screen-issue/

原因是gpu-manager在启动时会把xorg.conf删掉。先在/etc/X11下建一个xorg.conf文件，内容如下：
Section "ServerLayout"
Identifier "layout"
Screen 0 "nvidia"
Inactive "intel"
EndSection

Section "Device"
Identifier "intel"
Driver "modesetting"
EndSection

Section "Screen"
Identifier "intel"
Device "intel"
EndSection

Section "Device"
Identifier "nvidia"
Driver "nvidia"
BusID "PCI:1:0:0"
EndSection

Section "Screen"
Identifier "nvidia"
Device "nvidia"
Option "UseDisplayDevice" "None"
EndSection

然后再终端输入以下命令：sudo chattr +i /etc/X11/xorg.conf 防止任何程序改动它。再重启，终于能进桌面了。