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系統資訊：

tag-icon • tag-icon drivers nvidia graphics nvidia-optimus bumblebee
系統資訊：

一切都很好。我已經使用更新了英特爾驅動程式這個安裝程式。安裝驅動程式後，要求重新啟動，我照做了。現在optirun不行了。我認為英特爾驅動程式看起來不錯。我競選dpkg-reconfigure，bumblebee但bbswitch-dkms沒有nvidia-340任何幫助。還要重新啟動系統幾次。我發現以下錯誤。

$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)

系統資訊：

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

答案1

新的英特爾驅動程式是問題所在。 Nvidia 不支援新的 drm 環境。若要刪除新驅動程序，請執行以下命令：

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

然後重新啟動系統。optirun重新啟動系統後應該可以工作。如果沒有，則執行以下命令並重新啟動

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

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