TGL-U Enable and Disable MST on OSD menu not working
drmtip commit hash: 1d63cb5a7f02df241021731ce1ed8de3e3379bef Kernel version: 5.11 platform: TGL-U
Monitors brand: DELL P2415Q DELL P2314H DELL U2415
Steps to reproduce scenario 1: Assuming the monitor is being daisy-chained and first time need to enable the MST on parent's monitor (The monitor that attached to the board). On the Monitor's OSD menu, enable the MST Observe the monitor screen
Expected Result: The screen is extended/ MST feature enabled
Actual Result: Blank screen / black screen at first. Then, the monitors fall to sleep. The screen is not waking up as we moved the mouse. Additional info: from ssh terminal, if we send some event 'startx' for example, the monitor will works as expected result.
Steps to reproduce for scenario 2 Assuming the monitor is being daisy-chained and has being enabled the MST on parent's monitor (The monitor that attached to the board). On the Monitor's OSD menu, disable the MST Observe the monitor screen
Expected Result: The screen is extended/ MST feature disabled
Actual Result: Blank screen / black screen at first. Then, the monitors fall to sleep. The screen is not waking up as we moved the mouse. Additional info: from ssh terminal, if we send some event 'startx' for example, the monitor will works as expected result.
dmesg_startx_afterenabledmstatmonitor.txtdmesg_enabledMSTfrommonitor.txt