GS sharing content via HDMI did not work

Customer reported issues sharing content via HDMI with GS system. Looking at the log I can assume there was a negotation issue time out between the PC and the GS.    messages.2   2473   1 2019-07-29 07:16:29.104 INFO     klogd hd[0]  TI81XXHDMI_CEC_DEACTIVATE: messages.2   2481   1 2019-07-29 07:16:29.104 INFO     klogd hd[0] adv7510 2-003d check_port_status: TX_HDMI_EVENT_HPD ATTACH messages.2   2496   1 2019-07-29 07:16:29.142 INFO     klogd hd[0] adv7510 2-003d check_port_status: TX_HDMI_EVENT_HPD ATTACH messages.2   2909   1 2019-07-29 07:16:31.770 ERROR    klogd hd[0] dummy 2-0041 hdmi_cec_write_msg: Retry Time-out. messages.2   2948   1 2019-07-29 07:16:32.171 ERROR    klogd hd[0] dummy 2-0041 hdmi_cec_write_msg: Retry Time-out. messages.2   2969   1 2019-07-29 07:16:32.289 INFO     PCon hd[0] PcVideoOut PC: Setting 7510 video mode to HDMI messages.2   2972   1 2019-07-29 07:16:32.297 INFO     PCon hd[0] PcVideoOut VideoOutNotification_7510HDMI_Handler: component_id: "mon2" action: ATTACHED edid { signal: eHDMI resolution { width: 1024 height: 768 refresh_rate: 60 is_interlaced: false } resolution { width: 1280 height: 720 refresh_rate: 60 is_interlaced: false } resolution { width: 1280 height: 1024 refresh_rate: 60 is_interlaced: false } resolution { width: 1920 height: 1080 refresh_rate: 60 is_interlaced: false } resolution { width: 1920 height: 1080 refresh_rate: 60 is_interlaced: true } resolution { width: 1920 height: 1080 refresh_rate: 50 is_interlaced: false } resolution { width: 1280 height: 720 refresh_rate: 50 is_interlaced: false } resolution { width: 1920 height: 1080 refresh_rate: 50 is_interlaced: true } }  

Reboot resolves issue.