<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [GLK] no signal - with samsung 4k TV - HDMI UHD Color (ENABLED)" href="https://bugs.freedesktop.org/show_bug.cgi?id=110496#c37">Comment # 37</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [GLK] no signal - with samsung 4k TV - HDMI UHD Color (ENABLED)" href="https://bugs.freedesktop.org/show_bug.cgi?id=110496">bug 110496</a> from <a class="email" href="mailto:teeedubb@gmail.com" title="teeedubb@gmail.com">teeedubb@gmail.com</a> <pre>(In reply to sergey79 from <a href="show_bug.cgi?id=110496#c36">comment #36</a>) > I tested this Samsung TV with an AMD Athlon 200GE (Raven Ridge) system and > there were no issues in UHD Color mode. Note that AMD driver default to > YCbCr 422/444 in all 4K modes. > > Now I'm 90% sure that in "high speed" 594 Mhz HDMI modes those Samsung TVs > expect YCbCr rather than RGB. We need an option to to make the color space > switchable and not limited to RGB. RGB is obviously not the best option for > some displays. Sergey, you are correct. I have revisited this while trying to get HDR output working on my TV with GLK hardware. I have attached a screenshot of the relevant page.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>