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Just a heads up and if someone from Microsoft sees this maybe talk to the Surface team:
After installing the January 2020 driver and firmware updates for Microsoft Surface Laptop 3 (Intel), my machine detected my external monitor (Dell U2715H) as 640x480.
The connection is made from SL3 -> Lenovo USB-C Dock Gen 2 -> Displayport to Mini Displayport on the Dell U2715h.
The problem went away after I disabled DP1.2 on the Dell Monitor and the screen was detected with its native resolution of 2560x1440 again.
I think this should be added to the known issues on this article if possible: https://support.microsoft.com/en-us/help/4526150/surface-laptop-3-update-history
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
I tried another dock from one of my other offices and it worked fine. Maybe it just went bad? I have no idea. Trying to replace it and they're back-ordered. Maybe just a brush of bad luck, who knows, but it's still strange that other ports work except the display ports (usbs and it charges my SL3) and the display ports literally STOPPED working from one day to the next. Extremely frustrating and expensive. Glad I'm not alone!
The external display port output would flicker and go out after a minute or two of start up. Every morning I've been rebooting, un-docking and re-docking until the display works. I down graded Intel Iris drivers to 25.20.100.7101 (8/5/2019). After a power cycle all screens are black, including the laptop display even after I undock. I have used a USB 2.0 video adapter to get to a login screen. After login it seems to not have any issues. Its a lot of work to just boot up a new laptop every morning.
Not that this helps, but I thought I'd update. Called Microsoft on this issue at least 5 times, spending over 7 hours on the phone with them over the past week 1/2.
Every tech tries to troubleshoot and seems to have no idea what's going on. (Uninstall display drivers, re-install through MSI package. Restart, Clear display cache, etc. Sometimes it works for a few minutes, sometimes all day, but 80% it never works, and 100% of the time if fails at some point after initially working.
The sad part is there is clearly an update for the latest intel display drivers from Intel directly, but Microsoft hasn't released it in Windows update. No idea if this fixes our issue, but praying to God it does.
After the driver downgrade I had the issue on next power cycle. I spent thirty minutes after powering up docking, undocking, rebooting and power cycling after my display flaked out one or two minutes after login.
Previously when booting the laptop plugged into the dock I would get a black screen on the laptop display and external display. Since adding the USB 2.0 display adapter and leaving it as my primary display, I am able to log in. Display Manager shows the laptop display, but no resolution or other info/options.
I've since been able to boot while docked and doing so this morning I did not have any display issues. I'm going to let it go for a while as I follow the same routine for starting up the laptop and see if consistent behavior on my part is reciprocated by my Surface.
Thanks for the reply.
I've had such inconsistent results. Sometimes powering on and all is well, sometimes power off/on, plugging in usbc/unplugging, and constantly changing display modes for 10 minutes to have just blank or flickering screens on both, that didn't resolve until I rebooted and unplugged my external display.
Also I did end up manually installing the latest Intel display driver manually and it seems the problem still exists.
I am using an Anker USBC to HDMI out, and connecting my monitor via HDMI (no display port).
FYI if anyone is interested, I am looking into filing a Class action on this against Microsoft. Out $1500 and I can hardly get by using this for work (which relies 100% on multiple monitors).
