安装最新的 Intel 驱动程序后，Nvidia (Bumblebee) 无法加载

Question

一切都很好。我已使用此安装程序更新了 Intel 驱动程序。安装驱动程序后，它被要求重新启动，我做到了。现在optirun不工作。我认为英特尔驱动程序看起来不错。我跑dpkg-reconfigure了bumblebee，bbswitch-dkms并且nvidia-340但是没有什么帮助。还要重新启动系统几次。我发现了以下错误。

$optirun firefox
[  117.439917] [ERROR]Cannot access secondary GPU - error: Could not load GPU driver
[  117.439954] [ERROR]Aborting because fallback start is disabled.

$dmesg | tail
[  117.506015] nvidia: Unknown symbol drm_gem_prime_handle_to_fd (err -22)
[  117.506034] nvidia: disagrees about version of symbol drm_gem_private_object_init
[  117.506036] nvidia: Unknown symbol drm_gem_private_object_init (err -22)
[  117.506106] nvidia: disagrees about version of symbol drm_gem_handle_create
[  117.506107] nvidia: Unknown symbol drm_gem_handle_create (err -22)
[  117.506161] nvidia: disagrees about version of symbol drm_pci_exit
[  117.506162] nvidia: Unknown symbol drm_pci_exit (err -22)
[  117.506187] nvidia: disagrees about version of symbol drm_gem_prime_export
[  117.506188] nvidia: Unknown symbol drm_gem_prime_export (err -22)

系统信息：

Ubuntu 14.04 64bit
$lspci | grep "VGA\|3D"
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09)
04:00.0 3D controller: NVIDIA Corporation GK208M [GeForce GT 740M] (rev a1)

$dpkg --get-selections | grep -v deinstall | grep "bumblebee\|nvidia-\|bbswitch"
bbswitch-dkms                   install
bumblebee                   install
bumblebee-nvidia                install
nvidia-340                  install
nvidia-settings

Answer 1

新的英特尔驱动程序是问题所在。Nvidia 不支持新的 drm 环境。要删除新驱动程序，请运行以下命令：

sudo apt-get purge i915-3.15-3.13-dkms
sudo apt-get install --reinstall xserver-xorg-video-intel libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core
sudo dpkg-reconfigure xserver-xorg

然后重新启动系统。optirun重新启动系统后应该可以工作。如果没有，则运行以下命令并重新启动

sudo apt-get install --reinstall nvidia-340
sudo dpkg-reconfigure bbswitch-dkms