On Tue, 2020-01-28 at 16:00 -0500, Sanford Rockowitz wrote: > GProbe is the proprietary Genesis protocol. Is there a list of proprietary extensions to DDC somewhere? I wonder how useful implementations of these would be. For GProbe support for it could be used to start an open source monitor firmware project or to tell the monitor to stop supporting GProbe ;) > It's the use of operation code xC2, not normal reference to > manufacturer specific features with spec-defined operation codes, that's > the "trap door". Right, the surprising thing to me was that such manufacturer specific features could be extensive enough to include sub-protocols of DDC and even worse, that those sub-protocols would have such terrible design as to explicitly allow arbitrary code execution on the processor(s) of the display, possibly with the ability to save code to the monitor storage so that you cannot even trust your monitor. OTOH it possibly enables open source firmware, so it is a mixed bag I guess. -- bye, pabs https://wiki.debian.org/PaulWise
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