A Nvidia driver installing error with AMD/NVIDIA. TU116M [GeForce GTX 1660 Ti Mobile]

Hi friends!
l would like to install driver for my Ubuntu20.04/win10 system.[win10 is work and failed in Ubuntu]
my kernel=5.9.1
l tried a lot of solution and all failed.
now my status is.
l decide the version of driver by

ubuntu-drivers devices
driver : nvidia-driver-455 - third-party free recommended

so l install by

sudo apt-get install nvidia-kernel-source-455
sudo apt-get install nvidia-driver-455

i noticed something maybe wrong with during install

Not creating home directory `/nonexistent’. No such file or directory

then l want to test the driver by



then l follow the topic of nvidia-xconfig doesnt do what i want it to, nor does nvidia-settings - NVIDIA Developer Forums 61

Section “OutputClass”
Identifier “AMDgpu”
MatchDriver “amdgpu”
Driver “modesetting”

Section “OutputClass”
Identifier “nvidia”
MatchDriver “nvidia-drm”
Driver “nvidia”
Option “AllowEmptyInitialConfiguration”
Option “PrimaryGPU” “yes”
ModulePath “/usr/lib/x86_64-linux-gnu/nvidia/xorg”

create two files optimus.desktop in /etc/xdg/autostart/ and /usr/share/gdm/greeter/autostart/
l never create the /etc/X11/xorg.conf

then l code

__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia glxinfo | grep vendor
X Error of failed request: BadValue (integer parameter out of range for operation)
Major opcode of failed request: 152 (GLX)
Minor opcode of failed request: 24 (X_GLXCreateNewContext)
Value in failed request: 0x0
Serial number of failed request: 39
Current serial number in output stream: 40

l have no idea how to continue
l generate the report
nvidia-bug-report.log.log (321.1 KB)

please help me
thank U very much
if anyone has any solution please help me