<7>[ 699.858111] i915 0000:03:00.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpa] NAK for addr: 003a w(1) <7>[ 699.858304] i915 0000:03:00.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpa] NAK on first message, retry <7>[ 699.858623] i915 0000:03:00.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpa] NAK for addr: 003a w(1) <7>[ 699.858800] i915 0000:03:00.0: [drm:intel_hdmi_hdcp_read_bksv [i915]] Read Bksv over DDC failed (-6) <7>[ 699.859279] i915 0000:03:00.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpa] NAK for addr: 003a w(1) <7>[ 699.859443] i915 0000:03:00.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpa] NAK on first message, retry <7>[ 699.859766] i915 0000:03:00.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpa] NAK for addr: 003a w(1) <7>[ 699.859937] i915 0000:03:00.0: [drm:intel_hdmi_hdcp_read_bksv [i915]] Read Bksv over DDC failed (-6) <7>[ 699.860403] i915 0000:03:00.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpa] NAK for addr: 003a w(1) <7>[ 699.860567] i915 0000:03:00.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpa] NAK on first message, retry <7>[ 699.860888] i915 0000:03:00.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpa] NAK for addr: 003a w(1) <7>[ 699.861246] i915 0000:03:00.0: [drm:intel_hdmi_hdcp_read_bksv [i915]] Read Bksv over DDC failed (-6)