<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED --- - [HSW] no modes bigger than 1080p in the parsed EDID for 4k TV on both HDMI/VGA" href="https://bugs.freedesktop.org/show_bug.cgi?id=67030#c31">Comment # 31</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED --- - [HSW] no modes bigger than 1080p in the parsed EDID for 4k TV on both HDMI/VGA" href="https://bugs.freedesktop.org/show_bug.cgi?id=67030">bug 67030</a> from <a class="email" href="mailto:damien.lespiau@gmail.com" title="Damien Lespiau <damien.lespiau@gmail.com>"> Damien Lespiau</a> <pre>Created <a href="attachment.cgi?id=83302" name="attach_83302" title="Parse 4k VICs">attachment 83302</a> <a href="attachment.cgi?id=83302&action=edit" title="Parse 4k VICs">[details]</a> <a href='page.cgi?id=splinter.html&bug=67030&attachment=83302'>[review]</a> Parse 4k VICs Could you try this kernel patch? it parses the HDMI CEA vendor specific block to look for 4k modes. I noticed that X prunes those modes because their pixel clock is larger than the other detailed modes. It'll have to be fixed at some point. (II) intel(0): Not using mode "3840x2160" (bad mode clock/interlace/doublescan) You can however use libdrm's modeprint to check that the modes are exposed by the kernel: $ ./modeprint i915 Mode: "3840x2160" 3840x2160 30 Mode: "3840x2160" 3840x2160 25 Mode: "3840x2160" 3840x2160 24 I also left printks in this patch: $ dmesg | grep XXX [ 4.901749] [drm:do_hdmi_vsdb_modes], XXX: Found 3 modes in the HDMI vsdb [ 4.901751] [drm:do_hdmi_vsdb_modes], XXX: Found VIC 1 [ 4.901753] [drm:do_hdmi_vsdb_modes], XXX: Found VIC 2 [ 4.901755] [drm:do_hdmi_vsdb_modes], XXX: Found VIC 3</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>