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I am trying to configure bumblebee to switch my nvidia discrete card. As well bumblebee crashes when tries to modprobe nvidia. When i try to do it manually, i face the same error:

$ modprobe nvidia

modprobe: ERROR: ../libkmod/libkmod-module.c:832 kmod_module_insert_module() could not find module by name='off'
modprobe: ERROR: could not insert 'off': Unknown symbol in module, or unknown parameter (see dmesg)

Nvidia driver version is 410, when using 390 i face the same error.

  • Shouldn't you be using nvidia-prime? And then switch cards using the Nvidia X Server Settings? Bumblebee is outdated, I think. – GabrielaGarcia Oct 18 '18 at 15:20
  • @GabrielaGarcia I would use it, but it doesn't turn my discrete card off. Earlier I used bumblebee to shut down discrete card, and had success, but I've tried to update my nvidia drivers which broke everyhting. So my only choice is to use bumblebee. – V. Dalechin Oct 19 '18 at 17:11
  • You're supposed to reboot after setting a different card. Did you? (I know, we don't have to in Windows, but I'm telling you how it is in Ubuntu/Linux) – GabrielaGarcia Oct 19 '18 at 17:13
  • @GabrielaGarcia Yes, of course I did. I also had problems with that (login screen freeze), but there was a problem with ACPI tables. Now i can prime-select but my discrete card stays ON always, which doubles up my power discharge. – V. Dalechin Oct 20 '18 at 11:23
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So, IMHO, nvidia did some changes to their install. For everyone trying to get bumblebee work with their nvidia driver, you have to know that:

  1. Now nvidia library is located in /usr/lib/x86_64-linux-gnu

  2. blacklist-nvidia.conf file is located in /lib/modprobe.d/

The answer was in blacklist-nvidia.conf, which stil had alias nvidia off uncommented.

  • Confirmed to work in 18.04 after upgrade to nvidia 390.77. Bumblebee works for me now. – nesuribe Oct 25 '18 at 2:38

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