[Bug 103331] No signal output when connected with HDMI Monitor (asus PA238Q)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103331

--- Comment #8 from Ethan Hsieh <ethan.hsieh at canonical.com> ---
Created attachment 138414
  --> https://bugs.freedesktop.org/attachment.cgi?id=138414&action=edit
kern.log (drm.debug=0x14)

Still can reproduce the issue with kernel-drm-tip-2018-03-29.
http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/2018-03-29/

kernel: [1.340931] [drm:intel_hdmi_detect [i915]] [CONNECTOR:71:HDMI-A-1]
kernel: [1.390957] [drm:intel_hdmi_set_edid [i915]] HDMI GMBUS EDID read
failed, retry using GPIO bit-banging
kernel: [3.570781] [drm:intel_hdmi_detect [i915]] [CONNECTOR:82:HDMI-A-2]
kernel: [3.571559] [drm:intel_hdmi_set_edid [i915]] HDMI GMBUS EDID read
failed, retry using GPIO bit-banging
kernel: [3.581936] [drm:intel_hdmi_detect [i915]] [CONNECTOR:90:HDMI-A-3]
kernel: [3.582754] [drm:intel_hdmi_set_edid [i915]] HDMI GMBUS EDID read
failed, retry using GPIO bit-banging

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