So right now, I have nvidia-driver-415 installed on my laptop, Lenovo Z40 with GeForce 820M, running on Kubuntu 18.10. It doesn’t seem to be running right because audio is unbearable. Running nvidia-xconfig, then rebooting causes the display to switch to a lower resolution.
Running the recommended driver, nvidia-340, will render my laptop unusuable. I was only able to see the cursor on a black screen.
I have also tried nvidia-390, but there’s a lag between the video output and the input (like the menu slow to open).
When I open up NVIDIA settings, I get this:
$ nvidia-settings
ERROR: NVIDIA driver is not loaded
ERROR: Unable to load info from any available system
(nvidia-settings:10498): GLib-GObject-CRITICAL **: 10:43:52.764: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
** Message: 10:43:52.769: PRIME: Requires offloading
** Message: 10:43:52.769: PRIME: is it supported? yes
In addition, I’m getting this message when I switch to NVIDIA driver: PKCS#7 signature not signed with a trusted key.
Please delete /etc/X11/xorg.conf
You most likely have secure boot enabled so the nvidia modules can’t be loaded since they aren’t signed. Disable it in bios.
If that doesn’t resolve the issue, please run nvidia-bug-report.sh as root and attach the resulting .gz file to your post. Hovering the mouse over an existing post of yours will reveal a paperclip icon.
[url]https://devtalk.nvidia.com/default/topic/1043347/announcements/attaching-files-to-forum-topics-posts/[/url]
It’s a Fermi gpu so you can only use the 390 driver. Please install that and create a new nvidia-bug-report.log. Don’t care for the virus warning, the forum software is often going haywire.
Of course you can find it there, right under the info:
[i]Below are the legacy GPUs that are no longer supported in the unified driver. These GPUs will continue to be maintained through the special legacy NVIDIA GPU driver releases.
The 390.xx driver supports the following set of GPUs:
…
GeForce 820M 1140 1019 0799 C[/i]
Put simply, the kernel parameter tells your computer to configure the hardware for Windows 7 instead of Windows 10. Often is a workaround for failing dgpus.
The nvidia gpu is still failing to come up. If the kernel parameter doesn’t help you should test by installing Windows if there’s a general hardware failure.
Still the same error, I fear it’s broken. You can only install Windows and see if it works there but I doubt that.
The PKCS#7 warning is nothing to be concerned about, it seems you’re running a kernel with module signing enabled but since secure boot is disabled it isn’t enforced.
Regarding your desktop, I don’t know about nvidia-detector but if nvidia-settings and nvidia-smi -q show it and glxinfo |grep vendor returns ‘Nvidia’ everything should be correct.