Monitor stuck on displayport with 640x480

I have the same issue on my Surface Book 2.  27" 4k monitor is useless at the moment...

So, I had this problem around the January update for my SP7 i7/256 hooked up to two different Dell monitors (2414H and 2415) through the Surface Dock. The funny thing is one monitor (2415) worked, but the other (2414H) was stuck on 640x480 resolution. But I took Barbara(?)'s advice from earlier this thread and rolled back my driver for the Intel Iris Plus Graphics to the older one, and both monitor went back to working fine. I know this error did not come from the dock because I was running this same monitor setup with my old SP3 and had no trouble whatsoever. 

Recently, seeing how Intel was offering driver update to their Iris Plus Graphics outside of Windows Update, I decided to try an update and see if things work out. I installed the 27.20.100.8190 version, restarted SP7, but the 2414H monitor was now stuck on 640x480 resolution. Kind of disappointed, I was ready to roll back but decided to try another advice offered somewhere in this thread. I enable Displayport 1.2 on my 2414H monitor, and everything worked. (Well I did have to change my frequency from 59Hz back to 60Hz, changed originally to 59Hz due to another advice in this thread, to eliminate flickering.) But now both monitor works at their native resolution connected to the dock with the most updated driver. 

I have tried most of the basic advice (reset SP7, reset dock, update stuff) when I first encountered this problem, but none of them worked for me so I rolled back the driver. But changing the Displayport version on my monitor made it all work.

Thank you EthanChen5. This has worked for me. Surface Laptop 3 with Surface Dock and 2 Dell U2414H. Enabled Displayport 1.2 on both monitors and now is working perfectly.

So you have any idea when this firmware is going to be released?

Nope - sadly I don't have any better information that any other customer..

Nevermind, I'm sure you'd tried your best to help.

Thanks and cheers.

Brand new $2600 Surface Book 3 on a Surface Dock with a Dell U4320q over DisplayPort and the same 640x480 nonsense. I plug in my Surface Book 2 into the same exact setup and it is fine. From everything I am reading it is clearly something with the dock and Intel Iris graphics. Incredibly frustrating for such expensive hardware. 

This was a POC for further corporate investment due to COVID and this has us looking elsewhere. 

You folks need to allow roll backs of the firmware if it isn't impactful. 

FYI, they have released a firmware update to the Insider ring (read: beta tester) which seems to have fixed the issue, perhaps together with the 2004 update, or not... nobody knows for sure because MS hasn't been communicating since mid-March.

OTOH, the 2004 update is officially blocked till mid-June for SP7 and SL3, and possibly SPX and SB3 too.

Cheers.

We also have been dealing with this issue. Was tracking the Surface Dock 2 availability and it's online today for sale...

https://www.microsoft.com/en-us/p/surface-dock-2/8qd908364sg2?activetab=pivot%3aoverviewtab

Thanks for checking... but unless MS is going to replace all our Dock 1 for free, that isn't exactly a proper solution for most of us. The Dock isn't cheap at all.

I've read somewhere else that someone got a CAD$30 discount for Dock 2, after several attempts at contacting support but that was another issue.

Why should we have to spend so much time (which is cost as well) and potentially $$ to get our setups work as intended?

Cheers.