I've seen some posts re: this issue but all have involved adding some code to a Houdini environment variable? to get it to use my GPU rather than CPU. I've only just started learning Houdini so I have no idea on where to add code as an environment variable or whatever it is I'm meant to do. Just hoping someone could explain to me in relatively simple terms on how to fix this. Cheers.

If you are using Windows then the houdini.env file will be in the Windows documents folder. Open it with the notepad editor and underneath all of text that's already in there paste this code.

HOUDINI_OCL_VENDOR = NVIDIA Corporation

HOUDINI_OCL_DEVICENUMBER = 0


Then save the env file and start up Houdini again. When Houdini starts click the ‘help’ tab. Then at the bottom of the list choose ‘About Houdini’ and in the window that pops up put a tick in ‘Show details’ check box. Scroll about half way down to where it says ‘OpenCl Platform’ and it should now have your GPU listed.

Thanks paulcorfield.
I've added to houdini.env file & seems to have fixed the issue (see updated copy of houdini.env below)


# Houdini Environment Settings
#
# The contents of this file are read into the environment
# at startup. They will override any existing entries in
# the environment.
#
# The syntax is one entry per line as follows:
# VAR = VALUE
#
# Values may be quoted
# VAR = “VALUE”
#
# Values may be empty
# VAR =
#

# Example:
#
# HOUDINI_NO_SPLASH = 1



HOUDINI_NVIDIA_OPTIX_DSO_PATH = C: /Users/…/Documents/houdini17.0\optix

HOUDINI_OCL_VENDOR = NVIDIA Corporation

HOUDINI_OCL_DEVICENUMBER = 0

I actually downloaded Nvidia optix the other day to see if that would help, which explains what was the last line of txt on the houdini.env file before I added the txt you provided below it. Not sure if having optix helped or not & not even sure if I needed to download or not.

I opened up the same file I got the message on the other day to test & no message so hoping that has fixed the issue. Thank you again. Legend.

I tried this but it didn't work for me.

My houdini.env file reads:

#
# Houdini Environment Settings
#
# The contents of this file are read into the environment
# at startup. They will override any existing entries in
# the environment.
#
# The syntax is one entry per line as follows:
# VAR = VALUE
#
# Values may be quoted
# VAR = “VALUE”
#
# Values may be empty
# VAR =
#

# Example:
#
# HOUDINI_NO_SPLASH = 1


HOUDINI_DSO_ERROR = 2
PATH = “COctane_3.08.0.9/bin;CProgramData/Redshift/bin;$PATH”
HOUDINI_PATH = “COctane_3.08.0.9;CProgramData/Redshift/Plugins/Houdini/16.5.634;&”

HOUDINI_OCL_VENDOR = NVIDIA Corporation

HOUDINI_OCL_DEVICENUMBER = 0



but still get warning No OpenCL platform has the specified device type (HOUDINI_OCL_DEVICETYPE): GPU. Falling back to built-in CPU OpenCL driver.

I'm on Windows 10, Houdini 16.5.634, 2x 1080ti

Hello I am on windows 10 and i have this problem since i installed the last Nvidia Driver
Houdini can't find anymore my GPU (nvidia 1070) for OpenCL like if i go in preference/misc/OpenCL
Reverting to the previous NVIDIA driver fixed the issue
of course one day or another i will have to update my Driver so i reported this issue as a bug to Sidefx
Maybe it's because of the new RTX stuff they implement in the Driver, i don't know….
But you could try this , it worked for me !

Ben

Same issue here on H17, after installing the latest NVIDIA driver. H16.5 stayed unaffected. Rolling back the nvidia driver did not solved the issue.

@SteveS_66 would you mind listing the nVidia driver version you are using?

SteveS_66
Thanks paulcorfield.
I've added to houdini.env file & seems to have fixed the issue (see updated copy of houdini.env below)


# Houdini Environment Settings
#
# The contents of this file are read into the environment
# at startup. They will override any existing entries in
# the environment.
#
# The syntax is one entry per line as follows:
# VAR = VALUE
#
# Values may be quoted
# VAR = “VALUE”
#
# Values may be empty
# VAR =
#

# Example:
#
# HOUDINI_NO_SPLASH = 1



HOUDINI_NVIDIA_OPTIX_DSO_PATH = C: /Users/…/Documents/houdini17.0\optix

HOUDINI_OCL_VENDOR = NVIDIA Corporation

HOUDINI_OCL_DEVICENUMBER = 0

I actually downloaded Nvidia optix the other day to see if that would help, which explains what was the last line of txt on the houdini.env file before I added the txt you provided below it. Not sure if having optix helped or not & not even sure if I needed to download or not.

I opened up the same file I got the message on the other day to test & no message so hoping that has fixed the issue. Thank you again. Legend.

Currently using driver shown in attachments.

I can not solve the problem, does anyone help me? The version of my houdini is 18.5.462

This question and the first solution provided by paulcorfield are still relevant. Thank you.

I have same issue, but it is because I update my graphic card,

So if you have same problem with me,

Edit > Preferences > Miscellaneous > OpenCL Device

change to your new Card.

BeanGuard
I have same issue, but it is because I update my graphic card,

So if you have same problem with me,

Edit > Preferences > Miscellaneous > OpenCL Device

change to your new Card.

This works for me. The dedicated GPU was not selected in the settings.

Thanks a lot for those nice solutions.

Crystal Clear answer

akash.singh

BeanGuard
I have same issue, but it is because I update my graphic card,

So if you have same problem with me,

Edit > Preferences > Miscellaneous > OpenCL Device

change to your new Card.

This works for me. The dedicated GPU was not selected in the settings.

this method worked for with RTX card Houdini 19.0

I am having this issue on Fedora 38 after a fresh install of the OS, it was working fine before.
Am I missing something?

Update:
I forgot to install cuda drivers, now it is working.