Date: Mon, 23 Nov 2009 17:42:11 +0100 (CET) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-chat@FreeBSD.ORG, brett@lariat.net Subject: Re: lcd monitor manufacturer recommendation request Message-ID: <200911231642.nANGgB6M045061@lurza.secnetix.de> In-Reply-To: <200911212014.NAA02010@lariat.net>
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Brett Glass <brett@lariat.net> wrote: > Unfortunately, some monitors with digital interfaces are not > compatible with some LCD displays, even though the sockets and > cables look like they match up. For example, I recently tried to > hook an Asus "Eee Box", which has an HDMI connector, up to a > Samsung LCD display using a digital cable. Couldn't get it to work > at all, no matter how I adjusted the settings on both. But when I > used an analog adapter and cable, it worked on the first try at > maximum resolution, with (fortunately) few or no noticeable > artifacts. Analog isn't ideal, but it's a good fallback. This is just a guess, because I haven't used the HDMI connector on an Eee Box yet, but it sounds like you have a problem with encryption. HDMI signals support encryption (for DRM), so you have end-to-end protection when you play protected media. The signal is decrypted by the display, so there is no way someone can make a digital copy of the protected content. However, DVI does not support encryption, so HDMI-to-DVI cables only work for non-encrypted signals. Also, some computer monitors that have a HDMI connector do not support encryption. When you switch to an analog output, then encryption is not used, so the problem goes away. Encryption is only defined for digital HD signals. Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd "anyone new to programming should be kept as far from C++ as possible; actually showing the stuff should be considered a criminal offence" -- Jacek Generowicz
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