There is a Proprietary driver for the V4900 in Linux, available at www.amd.com/drivers by filling out the appropriate drop-down options (namely Workstation Graphics->FirePro 3D Series->FirePro V4900->Linux x86_64) . This suite, 12.104.2, will be the latest WHQL release for our supported Linux distributions (RHEL 6.3, SLED/SLES 10SP4/11SP2, OpenSUSE 11.4/12.1 and Ubuntu 11.10/12.04/12.10).
If you are still getting the watermark, let us know, as that should only be present for the Beta releases, not the WHQL suites.
AMD Customer Care
The information presented in this document is for informational purposes only and may contain technical inaccuracies, omissions and typographical errors. Links to third party sites are for convenience only, and no endorsement is implied.