Can't get 5120x1440 resolution with Latitude 5510

Well, this looked promising, but I'm afraid it didn't work. I confirmed that the registry was updated.  And even rebooted, but no difference.

@peterkronenberg  Take a look at this download.  It's for the Dell U4919DW, but that display uses the same resolution, and the download itself is just a Windows registry file that sets an "Enable5kModeSupport" option to Enabled.  And the download page specifically says it's meant to enable 5K mode on an Intel 630 GPU.  So it might work for your display.

@SamPT Short answer: 5120x2160 isn't going to happen, and absolutely wouldn't happen through the WD19.

Longer answer: The Dell Latitude 5510 uses Core 10th Gen CPUs based on the "Comet Lake" architecture, not Core 10th Gen "Ice Lake" CPUs.  The Comet Lake CPUs use Intel's older GPU that only supports DisplayPort 1.2/HBR2, which can only run up to 4K 60 Hz.  5120x1440 is possible because that is slightly fewer total pixels than 4K (3840x2160).  And when connect to a WD19, you only get half of a DP 1.2 interface of bandwidth because the dock is running USB 3.x simultaneously, and due to the way USB-C works (prior to USB4, which will work like TB3), running video and USB 3.x simultaneously requires cutting video bandwidth in half.  I wrote an explainer post about this here if you're curious.  But even if you got a Thunderbolt 3 dock like the WD19TB, which can run dual DP 1.2 interfaces (i.e. 2x more bandwidth than a direct USB-C connection and 4x more bandwidth than the WD19 can access), you still wouldn't be able to run that display because Intel GPUs do not support aggregating multiple source GPU interfaces to run a single display.  They can do the opposite, i.e. run multiple displays from a single interface, which relies on a technology called DisplayPort MST, but they can't do link aggregation.  And even if they could, relatively few displays even support being driven that way.  Dell's first 5K display introduced around 2015 did this because there was no way to run 5K 60 Hz other than dual DP 1.2 interfaces back then, and their current 8K display will do this because 8K 60 Hz requires dual DP 1.4 interfaces.  But those displays are obviously not typical.

Hello,

I'm also curious about the max resolution supported by this laptop. I also have the WD19 Dock station with 180watt power supply.

I'm looking at 5120x2160 screens but don't know if it would work either connecting directly to the laptop or to the dock station.

@jphughan 

Thank you for the detailed answer

I found this , and if i'm at HRB2 this means i won't be able to use two 2560×1440, one connected to the laptop and one to the dock, am i correct?

@SamPT  Excellent, then you have Thunderbolt. So if you want to run any setup that includes a 4K 60 Hz display, you may want to consider the WD19TB.

@SamPT  You just changed your requirements here....

The Latitude 5510 only has one USB-C port, which can optionally have Thunderbolt 3 support added. Does your system have TB3? If not and you’re just using the regular WD19, then you can run either a 2560x1440 60 Hz display or a 4K 30 Hz display from it. At that point, the only output left on the system for a direct display connection is HDMI. The specs of the 5510 say it’s rated for HDMI 1.4b, which means 2560x1440 60 Hz or 4K 30 Hz.

If your system actually has Thunderbolt 3, then you could instead get the WD19TB dock. In that case you’d be able to run dual displays up to 4K 60 Hz each or triple displays up to 2569x1440 each, all through the dock, because the WD19TB with your system will be able to tap into 4x more video bandwidth than the regular WD19. Note that there are some restrictions on port combinations you can use on the WD19TB for setups involving a 4K 60 Hz display and anything else, as well as triple display setups. Check the WD19TB user guide’s Display Resolution Table for a Thunderbolt HBR2 system.

On of the part numbers of my system is: 

@SamPT  You’re welcome. The setup you’re describing WILL work, because an HBR2 system can run a 2560x1440 display from the half interface available to the dock, and the other display that’s connected directly to the system won’t need its bandwidth requirements to be met through the dock. It will have its own interface.

@jphughan 

So if my judgment is sound, i could use um regular 4k monitor at 60hz (or would it have to be 30hz?) connected to the laptop, and one 1440p connected to the dock?

having the same issue with a Samsung G9 and My work laptop (Dell Latitude 5300) unfortunately I think its a limitation of the Intel UHD 650 drivers I have resigned myself to using the picture in picture display mode and splitting it into 2 screens for work and a single display for gaming on my custom rig after work.