A display-driver or dock-firmware update is easier to evaluate when the existing arrangement has been recorded. Updates may address known problems, but they can also change detection, available modes or sleep behavior. Establish a recoverable baseline and a reason for the change so that the process remains a controlled maintenance task rather than a sequence of guesses.
Record the working and failing conditions
Write down the computer, operating system, graphics device, dock model and monitor models. Include the current driver and firmware versions where they are available through documented tools. Record the two active modes and the cable routes. If the problem is intermittent, describe a repeatable trigger such as waking after sleep or connecting the second display during a call.
Read the relevant manufacturer's update instructions and release notes for the exact product. Similar dock names can refer to different hardware revisions, and a generic graphics package may not be the recommended route for a particular managed laptop. Confirm compatibility and any required sequence, especially when an organization controls the device or provides its software updates.
Save work and make the required backup or recovery preparations. Identify how to return to a previous driver when that option is supported, and understand whether the firmware process offers rollback at all. Do not assume a firmware change is reversible merely because a software installer can be removed. Keep access to the vendor's recovery guidance before beginning.
Update one layer and repeat the same test
Use the supported power arrangement and avoid disconnecting the dock or shutting down during an update. Follow any instructions about attached peripherals and monitor connections. An update utility's progress message is not a reason to improvise a cable change. Wait for the documented completion and restart sequence before assessing whether the display configuration has changed.
After the first update, restore the recorded supported modes if necessary and repeat the original task. Check both monitors, not just the one that previously failed. Include audio, USB and network devices carried by the dock where relevant, because a maintenance step can affect the shared device route even when the desktop picture appears normal.
Keep other variables steady while observing the result. Replacing a cable, reducing refresh rate and updating firmware at the same time can produce a stable picture without revealing which change mattered. If an additional change is needed, record it separately. For an intermittent fault, use the arrangement long enough to cover the circumstances that previously triggered the interruption.
Retain the version record and the observed outcome, including any new limitation. If the update creates a problem, use the documented recovery route or seek support with that evidence. A useful maintenance record explains what changed, which test passed and what remains uncertain; it does not treat the newest version as proof that every two-monitor problem has been resolved.