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I have Lenovo IdeaPad Z500 laptop and fresh Kubuntu 14.04 installed on it with Windows 8.1. I have a problem: Kubuntu doesn't detect my dGPU NVIDIA GeForce 740M. Example:

piotr@piotr-Lenovo-IdeaPad-Z500:~$ lspci
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)                                                                                  
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09)                                                             
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)                                                                
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)                                                         
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)                                                      
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)                                                  
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)                                                   
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)                                                              
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4)                                                              
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)                                                  
00:1f.0 ISA bridge: Intel Corporation HM76 Express Chipset LPC Controller (rev 04)                                                                                      
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)                                                          
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)                                                                          
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)

A also purged all packages associated with NVIDIA. I have to say that after Kubuntu installation it have seen it, but few days after this issue have appeared.

PS Sorry for my English. If something you can't understand, I can rewrite it. :)

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  • How do you know you have an Nvidia adapter?
    – Pilot6
    Oct 15, 2015 at 11:34
  • I know I have NVIDIA GeForce GPU, because under Windows 8.1 everything works fine. For example if I run xcom: enemy unknown I can play at highest details.
    – pyskp
    Oct 15, 2015 at 11:38
  • Do you really see the Nvidia adapter in Windows Device manager?
    – Pilot6
    Oct 15, 2015 at 11:39
  • Yes, I'm sure that under Windows 8.1 x64 everything works fine and NVIDIA adapter is in Windows Device manager.
    – pyskp
    Oct 15, 2015 at 12:36
  • 1
    @Pysiek please try out my answer and post back whether it works. :)
    – cl-netbox
    Oct 15, 2015 at 12:44

1 Answer 1

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Your lspci output shows that you currently are using the integrated intel graphics solution.

Install the latest stable NVIDIA drivers supporting GT 740 from the Proprietary GPU drivers PPA.

Before you install new drivers uninstall every NVIDIA related software you have installed before.

Open a terminal and execute :

sudo apt-get purge '^nvidia.*'  
sudo apt-get purge bumblebee
sudo reboot

Then install the latest current stable NVIDIA drivers from the long-lived branch by executing :

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-352 
sudo reboot  

In case you are using a notebook with a hybrid graphics solution install Optimus support as well.

sudo apt-get install nvidia-prime

To switch between intel and nvidia graphics - open NVIDIA X Server Settings -> Prime Profiles.

After switching to NVIDIA run sudo lspci again and the output shows your NVIDIA GT 740 GPU.

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  • Comments are not for extended discussion; this conversation has been moved to chat.
    – Mitch
    Oct 15, 2015 at 19:07

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