There is an NVIDIA Linux Driver web forum. You can access it by going to http://forums.developer.nvidia.com and following the "Linux" link in the “GPU Unix Graphics” section. This is the preferable tool for seeking help; users can post questions, answer other users' questions, and search the archives of previous postings.
If all else fails, you can contact NVIDIA for support at:
<linux-bugs@nvidia.com>.
But please, only send email to this address after you have explored
the Frequently Asked Questions and Common Problems chapters of this
document, and asked for help on the forums.developer.nvidia.com web
forum. When emailing <linux-bugs@nvidia.com>,
please include the nvidia-bug-report.log.gz file generated by the
nvidia-bug-report.sh
script (which is installed as part of driver installation), along
with a detailed description of your problem.
To report a potential security vulnerability in any NVIDIA product, please use either:
this web form: Security Vulnerability Submission Form, or
send email to: psirt@nvidia.com
If reporting a potential vulnerability via email, please encrypt it using NVIDIA's public PGP key (see PGP Key page) and include the following information:
Product/Driver name and version/branch that contains the vulnerability
Type of vulnerability (code execution, denial of service, buffer overflow, etc.)
Instructions to reproduce the vulnerability
Proof-of-concept or exploit code
Potential impact of the vulnerability, including how an attacker could exploit the vulnerability
http://www.tldp.org/HOWTO/XFree86-Video-Timings-HOWTO/index.html