P2419H, 180° rotate feature request

Question

So I've went through a couple of posts that suggest that you can only rotate 90 Degrees (left or right) but not 180 Deg.

The question is, why I can't do a 180° rotate? Now Dell guys would argue that you could do this from GPU which goes against why there is a rotate feature in the first place if I can all sorts of rotations through GPU as well?

The reason anyone would want to do any sort of rotate on the monitor side is just to offload all these configuration to the monitor rather than GPU driver.

I do have 8 x P2419H as 2 sets of 2x2 grids. Why do I need to do 180° rotate? So I align bezel-less edges togethers to get a better and nice looking experience.

I am pretty sure that Dell can enable this via Firmware update. Please consider adding that feature, I am pretty sure it's a couple lines of code.

DELL-Chris M · Answer

The question is, why I can't do a 180° rotate?
* Because it was not designed that way by the manufacturer. The manufacturer shows on page 56 in the online P2419H User's Guide that 90° is the maximum. Dell is not going to create a firmware that deviates from the manufacturer original design.

jphughan · Answer

@mohsh86_ Even the existing 90-degree rotation capability just refers to being able to physically rotate the display on its included stand. The display does NOT apply any sort of signal processing to account for the rotation. You have to go into Windows and tell the system that the display is rotated, or at least have an application that will do that for you, because Windows for example needs to know that it’s working with a 1080x1920 canvas rather than a 1920x1080 canvas. Processing that change purely in the display wouldn’t make any sense at all, since rotating a native 1920x1080 desktop signal by 90 degrees to fit a 1080x1920 pixel grid and keep the “up” side up would result in both horizontal and vertical distortion.

Of course a 180-degree inversion is another matter. But you would be asking for a firmware update to add something that doesn’t even exist right now, not an extension of an existing feature. It’s not even clear to me that the internal chips would be fast enough to do that though. It’s also not clear to me why you think that transformation is a meaningful GPU load.

jphughan · Answer

@mohsh86_ Also, the claim that being able to rotate a signal on the GPU side goes against why there is a rotate feature in the first place doesn’t make sense either. The rotation feature of the display is a feature of its stand, not the panel and its electronics. And it has to be used in conjunction with the OS/GPU, not instead of. AND the stand doesn’t allow 180-degree rotation, so the fact that the OS/GPU can offer that doesn’t “go against” anything.

If you want to rotate your display 180 degrees, you’ll need to detach it from its included stand and mount it on an arm or similar assembly that allows free rotation. And if you want the display to perform the inversion, you’d need a display with a hardware orientation sensor and that capability. I don’t know how common those are on PC desktop displays. Otherwise, you’ll just have to content yourself relying on an OS/GPU feature to facilitate that desired setup.

mohsh86_ · Answer

Looks like I got confused. When I triggered rotation through OSD the whole image on the screen has changed (windows task bar, wallpaper etc) and I assumed this is done on the display side.

Apparently this trigger got communicated to the OS somehow (through DPI nativly or through Dell Display Manager software i have installed) and change the display settings on the OS level.

Case closed.

Monitors

P2419H, 180° rotate feature request

Was this post helpful?