After you install the necessary driver package, you'll still need to choose one of the methods on the NVIDIA Optimus page in order to activate and make use of your NVIDIA card. Note: if this lspci command returns more than one line of output, you have an Optimus (hybrid) graphics chipset. The PCI ID can be used to verify device support. See HowToIdentifyADevice/PCI for more information. $ lspci -nn | egrep -i "3d|display|vga"Ġ7:00.0 VGA compatible controller : NVIDIA Corporation GM206 (rev a1).The NVIDIA graphics processing unit (GPU) series/codename of an installed video card can usually be identified using the lspci command. GPU isn't functional, even with a compatible driver version installed.Driver stops working after upgrading Debian.Installing 32-bit libraries on a 64-bit system.Version 418.152 (via stretch-backports).Version 460.73.01 (via buster-backports).I hope this helps someone not to sped months loosing time on this issue. I am back with full resolution and able to connect and external monitor. It's not friendly and I had to download 2 GB of driver databases until it found and installed the right one for my graphics card. It's free, 0 unwanted software (it's standalone), it's community-built (thank you community!) and it does the trick.
I was about to reinstall Vista, and then I found the solution: it's called Snappy Driver Installer. I even installed poor quality driver seeker software that didn't solve the problem and installed unwanted software in my computer. I tried every solution on the net and nothing worked. I installed all the possible drivers both from Nvidia and from Dell and I always got either a non-compatible device, either a conflict between 32 and 64 bit versions (even when installing 64 bit drivers). I had the same problem for months with a Dell Latitude D830 and a Nvidia NVS 110M graphics card after upgrading to Windows 7 64 bit.
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