Thunderbolt 3 Dock outputs detects wrong resolution

[SImhoff]

I've seen some of the earlier threads about wrong display resolution, but mine's working (or not) a little differently.

To be specific, it's detecting that the maximum possible resolution is 1920x1080... except I'm using a HP LA2405wg, which is 1920x1200.  It doesn't matter how many, or few, monitors I plug into the dock, it just isn't going any higher than 1080 (so the display appears stretched).  I can confirm there's no problem with the monitor or cable, and that the system is just fine - I'm using a ZBook 15 G3 (w/ NVidia discrete card - V2W12UT#ABA), and plugging into the onboard VGA port autodetects and uses the correct native resolution.

I'm not sure what could be done on my end.  Note that I'm on a corporate machine, so certain types of troubleshooting (say, BIOS related) may be difficult.  I'm actually expecting this to be due to some sort of firmware limitation, so more just letting people know.

[Huffer]

I am thinking 1920 x 1080 is the max you can achieve with a Dsub (VGA) port. The Zbook G3 has a USB-C port and you can easily get an adapter for DVI, HDMI or DP. On my Zbook G3, a USB-C to DP works great and I am sure you have seen it also has an HDMI port built into the machine. 

You have these ports on the monitor:

HP LA2405wg

DVI-D VGA DisplayPort 2 x USB downstream USB upstream ( Type B )

An HDMI to DVI should also provide the right resolution. 

Might also be able to create a custom screen resolution with the nVidia control panel. 

[SImhoff]

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@Huffer wrote:

I am thinking 1920 x 1080 is the max you can achieve with a Dsub (VGA) port.

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This is false.  The VGA port on the laptop itself recognizes the native resoluion and happily outputs at 1920 x 1200.

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@Huffer wrote:

The Zbook G3 has a USB-C port and you can easily get an adapter for DVI, HDMI or DP.

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Sure, and I might do that in the future (I currently lack a male-male USB cable).  But until then....

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@Huffer wrote:

Might also be able to create a custom screen resolution with the nVidia control panel. 

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This does work, so it can hold me over for now.  However, it doesn't deal with the actual, underlying problem, which is that the port doesn't even detect the proper resolution for the monitor.

[Huffer]

I just sort of ignore the D-sub port since it represents older technology. I just find that even if it does display at the correct resolution, the analog signal just is not as sharp as a digitial signal so try to use DVI, HDMI or DP if possible. Glad you have it working, though.