<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - I7-8700 onboard HDMI port does not support 4K resolution" href="https://bugs.freedesktop.org/show_bug.cgi?id=112018#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - I7-8700 onboard HDMI port does not support 4K resolution" href="https://bugs.freedesktop.org/show_bug.cgi?id=112018">bug 112018</a> from <a class="email" href="mailto:jian-hong@endlessm.com" title="jian-hong@endlessm.com">jian-hong@endlessm.com</a> <pre>Created <a href="attachment.cgi?id=145752" name="attach_145752" title="dmesg with DRM debug">attachment 145752</a> <a href="attachment.cgi?id=145752&action=edit" title="dmesg with DRM debug">[details]</a> dmesg with DRM debug I appended drm.debug=0xe to boot command to enable DRM debug. [ 1.863260] [drm:drm_dp_dual_mode_detect [drm_kms_helper]] DP dual mode HDMI ID: DP-HDMI ADAPTOR\004 (err 0) [ 1.864262] [drm:drm_dp_dual_mode_detect [drm_kms_helper]] DP dual mode adaptor ID: ff (err 0) [ 1.864287] [drm:intel_hdmi_set_edid [i915]] DP dual mode adaptor (type 1 HDMI) detected (max TMDS clock: 165000 kHz) [ 1.864294] [drm:drm_detect_monitor_audio [drm]] Monitor has basic audio support [ 1.864297] [drm:drm_helper_probe_single_connector_modes [drm_kms_helper]] [CONNECTOR:86:HDMI-A-1] status updated from unknown to connected [ 1.864306] [drm:drm_add_display_info [drm]] non_desktop set to 0 [ 1.864312] [drm:drm_add_display_info [drm]] HDMI: DVI dual 0, max TMDS clock 600000 kHz [ 1.864317] [drm:drm_add_display_info [drm]] HF-VSDB: max TMDS clock 600000 kHz [ 1.864332] [drm:drm_add_edid_modes [drm]] ELD monitor ASUS VP28U [ 1.864338] [drm:drm_add_edid_modes [drm]] HDMI: latency present 0 0, video latency 0 1, audio latency 96 2 [ 1.864344] [drm:drm_add_edid_modes [drm]] ELD size 36, SAD count 1 [ 1.864349] [drm:drm_add_display_info [drm]] non_desktop set to 0 [ 1.864355] [drm:drm_add_display_info [drm]] HDMI: DVI dual 0, max TMDS clock 600000 kHz [ 1.864361] [drm:drm_add_display_info [drm]] HF-VSDB: max TMDS clock 600000 kHz [ 1.864624] [drm:drm_mode_debug_printmodeline [drm]] Modeline "3840x2160": 60 594000 3840 4016 4104 4400 2160 2168 2178 2250 0x48 0x5 [ 1.864629] [drm:drm_mode_prune_invalid [drm]] Not using 3840x2160 mode: CLOCK_HIGH [ 1.864635] [drm:drm_mode_debug_printmodeline [drm]] Modeline "3840x2160": 30 297000 3840 4016 4104 4400 2160 2168 2178 2250 0x40 0x9 [ 1.864640] [drm:drm_mode_prune_invalid [drm]] Not using 3840x2160 mode: CLOCK_HIGH It shows it is type 1 HDMI adapter with max TMDS clock: 165000 kHz which is lower than the expectation of 3840x2160. Although, the connected monitor ASUS VP28U supports max TMDS clock 600000 kHz.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>