DViCO

DViCO is a Korean company which produces quite popular TViX media players. Most of them are based on Sigma Designs reference board and run some kind of embedded Linux. They even have a GPL page on their website with the full text of GPL v2 and a link to the source code tarball, which indicates that they admit to using Linux in their systems and understand what GPL is.

The only problem is that the above tarball, which is supposed to include the full sources of their software along with the compilation instructions, is identical to the one released by Sigma Designs for their EM8500 reference board. As TViX system has clearly different hardware and software, these source won't run "as is" on their hardware and clearly do not contain their modifications, i.e. derived work, to the GPL code.

Unfortunately, this is very typical and common case of GPL violation.

Interestingly enough, their "firmware upgrade" image appears to be encrypted in some way as I did not manage to find any of the known Linux filesystem images inside of it when I tried to get shell access.


Links:
DViCO
DViCO "GPL" page
Sources of Sigma Designs EM8500 reference board