Eu tenho tentado instalar drivers NVIDIA no meu Dell 7559 Ubuntu 14.04.5 com pouco sucesso. O menu Drivers Adicionais não aplica os drivers recomendados (volta ao X.org) e eu não consigo baixar os drivers do PPA ppa:graphics-drivers/ppa porque alguns pacotes não podem ser autenticados.
Executando sudo ubuntu-drivers autoinstall :
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
libfdk-aac0
Use 'apt-get autoremove' to remove it.
The following extra packages will be installed:
bbswitch-dkms libcuda1-387 nvidia-opencl-icd-387 nvidia-prime
nvidia-settings ocl-icd-libopencl1 screen-resolution-extra
Suggested packages:
bumblebee opencl-icd
The following NEW packages will be installed:
bbswitch-dkms libcuda1-387 nvidia-387 nvidia-opencl-icd-387 nvidia-prime
nvidia-settings ocl-icd-libopencl1 screen-resolution-extra
0 upgraded, 8 newly installed, 0 to remove and 1 not upgraded.
Need to get 82,1 MB/82,1 MB of archives.
After this operation, 374 MB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
ocl-icd-libopencl1 bbswitch-dkms screen-resolution-extra
E: There are problems and -y was used without --force-yes
Eu executei sudo apt-key update e sudo apt-get update para tentar resolver o problema de autenticação, mas sem sucesso.
Existe alguma maneira de contornar isso?