Problem with 34" ultrawide monitor not fully expanding - using elitebook 840 g6

[lkatase]

connecting to 34" ultrawide monitor but window does not expand the entire width on the monitor.  on the monitor, there's about 5" of black unusable space about the size of a 26" monitor.  

[WAWood · Accepted solution]

@lkatase 

This is most likely a driver issue.  So, is the monitor running in 4K mode?  If so, that can be an issue because only the most recent Win10 video drivers can handle 4K properly.

[lkatase]

would you know whether win10 video driver can be used with elitebook 840?

[WAWood]

@lkatase 

Since you're using an external monitor with your laptop, it could very well be that the laptop itself is not designed to handle 4K displays, which is why I asked about that.  If you force the install of other video drivers solely to address that, you risk corrupting the built-in screen display and you don't want to do that.

[lkatase]

would you be able to recommend an ultrawide 34" that could work with  my elitebook?