nvidia-settings could not find the registry key file

[rdesfo]

I tried to enable the Nvidia driver adding the following to my configuration.nix file:

services.xserver.videoDrivers = [ "intel" "nvidia" ];

The system boots up as normal, but I get the following message when I run. I've also tried removing "intel" from the video driver list, but that cause x to fail.

$ nvidia-settings 

ERROR: nvidia-settings could not find the registry key file. This file should have been installed along with this driver at /usr/share/nvidia/nvidia-application-profiles-key-documentation. The
       application profiles will continue to work, but values cannot be prepopulated or validated, and will not be listed in the help text. Please see the README for possible values and
       descriptions.

$ nixos-version 
16.03.1213.baf46b9 (Emu)

[codyopel]

If you are having problems with graphics drivers please include the intel cpu model and nvidia gpu model otherwise opening an issue is pointless and cannot be looked into.

The path is hardcoded for nvidia-application-profiles-key-documentation
https://github.com/NVIDIA/nvidia-settings/blob/488accd5dc9b2f2392a4eb047807228d985cdd44/src/gtk%2B-2.x/ctkappprofile.c#L3669L3675

nvidia-settings is distributed as a binary with the driver so you would have to build it from source and I am unsure if versions are backwards compatible. It is only a warning that the file wasn't found and it is unlikely that anyone is using the application-profiles functionality associated with this.
http://www.nvidia.com/object/profiles.html

[rdesfo]

sorry, for the missing information.

# lscpu 
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                4
On-line CPU(s) list:   0-3
Thread(s) per core:    2
Core(s) per socket:    2
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 61
Model name:            Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
Stepping:              4
CPU MHz:               2200.171
CPU max MHz:           2700.0000
CPU min MHz:           500.0000
BogoMIPS:              4396.00
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              3072K
NUMA node0 CPU(s):     0-3
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch ida arat epb pln pts dtherm intel_pt tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap xsaveopt

# lspci -v
...
03:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 960M] (rev a2)
    Subsystem: Dell Device 06e1
    Flags: bus master, fast devsel, latency 0, IRQ 16
    Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    Memory at f0000000 (64-bit, prefetchable) [size=32M]
    I/O ports at d000 [size=128]
    Expansion ROM at f7000000 [disabled] [size=512K]
    Capabilities: [60] Power Management version 3
    Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
    Capabilities: [78] Express Endpoint, MSI 00
    Capabilities: [100] Virtual Channel
    Capabilities: [250] Latency Tolerance Reporting
    Capabilities: [258] L1 PM Substates
    Capabilities: [128] Power Budgeting <?>
    Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
    Capabilities: [900] #19
    Kernel driver in use: nvidia

# dmesg | grep nvidia
[   19.630609] nvidia: module license 'NVIDIA' taints kernel.
[   19.637220] nvidia 0000:03:00.0: enabling device (0006 -> 0007)
[   19.637382] nvidia-nvlink: Nvlink Core is being initialized, major device number 247
[   19.637491] [drm] Initialized nvidia-drm 0.0.0 20150116 for 0000:03:00.0 on minor 0
[   20.098689] nvidia-uvm: Loaded the UVM driver in lite mode, major device number 246

There is also a pop up that says the following when I run the nvida-settings

You do not appear to be using the NVIDIA X driver.  Please edit your X configuration file (just run `nvidia-xconfig` as root), and restart the X server.

[RamKromberg]

That's two separate issues.

1. nVidia settings giving an error regarding profiles: I have that too and my system works fine.
2. NVIDIA Optimus issues: I don't own hardware that has that mixed Intel\nVidia hardware but I can point you to: nixos/modules/services/hardware/nvidia-optimus.nix and nixos/modules/hardware/video/bumblebee.nix. I think it comes down to using bumblebee instead of nvidia and intel while making sure that service is running to switch between display modes... But don't quote on that :D

[rdesfo]

I thought nvidiaOptimus option was just for disabling the nvidia card.

hardware.nvidiaOptimus.disable
Description:        Completely disable the NVIDIA graphics card and use the integrated graphics processor instead.
Default value:      false

Regarding bumblebee, I've added it to my configuration.

...
  hardware.bumblebee = { 
    enable = true;
    driver = "nvidia";
  };

  # Enable the X11 windowing system.
  services.xserver = {
    enable = true;
    layout = "us";

    videoDrivers = [ "intel" "nvidia" ];
    vaapiDrivers = [ pkgs.vaapiIntel pkgs.vaapiVdpau ];

    startGnuPGAgent = true;
  };
...

[RamKromberg]

Since I have no experience with any of this, I've googled "configuration.nix" bumblebee and got https://github.com/yamafaktory/nixos-configuration/blob/master/configuration.nix, https://gist.github.com/pallavagarwal07/ed1303355d48616de313a4eb1a47e058 and https://superuser.com/questions/1096307/how-to-configure-nixos-with-nvidia-on-an-optimus-laptop on the first page.

Looking at those examples, I think you're not supposed to override hardware.bumblebee.driver. Also, try the beta driver. Finally, make sure to reboot the system between changes. nixos-rebuild doesn't handle driver changes as gracefully as it does the user-land so the odd reboot at least while configuring things for the first time can't hurt ;)

[rdesfo]

Thanks for the links, but it's still not working. I'm going to wait until 16.09 before trying again.

[RamKromberg]

@rdesfo that's unfortunate :/ maybe try asking around in the irc or the mailing list for someone who actually owns the hardware in question? I bet I'm missing something really obvious...

Either way, good luck.

[miroi]

Hi, I have similar problem, https://devtalk.nvidia.com/default/topic/1009727/error-nvidia-settings-could-not-find-the-registry-key-file/ , any progress in this thread ?

[codyopel]

@miroi
As previously stated, the message is a non-fatal warning. Fixing the warning requires building nvidia-settings from source to patch hard coded assumptions, if it isn't already in nixpkgs. As well as setting up some paths and symlinks.

These are the necessary changes to fix the warning:
https://github.com/triton/triton/blob/master/pkgs/all-pkgs/n/nvidia-settings/default.nix#L78#L80
https://github.com/triton/triton/blob/master/services/n/nvidia-drivers/default.nix#L85#L90
https://github.com/triton/triton/blob/master/pkgs/all-pkgs/n/nvidia-drivers/default.nix#L410#L421

[miroi]

Thanks, I already fixed it - the reason was that nvidia card was asking to emulated graphics on remote server (via ssh -X), not on home server.

The solution was installing vncserver on card's host server and reach it's graphics via vncclient.

Nvidia packages from elrepo-nvidia are fine.

[Nick7hill]

i am having the same , i issue bcoz of it , i am unable to use gpu for training ML models

[Kelvinson]

@miroi I am having the same problem, could you please explain your solution more again? Sorry for my ignorance.

[miroi]

Well, https://devel.umb.sk/redmine/projects/hpcc/wiki/Install_adf (in Slovak language), nvidia tesla works fine on remote server...

[Kelvinson]

@miroi Thank you!

[npreiber]

anyone have tips for using the vnc client. The given link leads to a password protected page. (Also I don't know slovak, That language is hard.)