No HDMI output of Asus PA27A
There are 4 ports on the back, 2 HDMI and 2 DP, however only the topest HDMI cannot display on ASUS PA27A. The HDMI port did work on BENQ 4k monitor. Looks like not compatible with ASUS PA27A monitor.
suspect error message: [ 1.614295] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus tc3] NAK for addr: 0054 w(1)
[ 1.614325] i915 0000:00:02.0: [drm:gen8_de_irq_handler.isra.0 [i915]] The master control interrupt lied (SDE)!
[ 1.614390] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus tc3] NAK on first message, retry
[ 1.615522] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus tc3] NAK for addr: 0054 w(2)
[ 1.615591] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus tc3] NAK on first message, retry
[ 1.616167] i915 0000:00:02.0: [drm:gen8_de_irq_handler.isra.0 [i915]] The master control interrupt lied (SDE)!
[ 1.617835] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus tc3] NAK for addr: 0054 w(1)
[ 1.617907] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus tc3] NAK on first message, retry
[ 1.618165] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus tc3] NAK for addr: 0054 w(1)
[ 1.618234] i915 0000:00:02.0: [drm:drm_scdc_set_scrambling [drm_display_helper]] [CONNECTOR:259:HDMI-A-3] Failed to read TMDS config: -6
Log attached:dmesg.txt