External screen locked to 60Hz Deputy P40

[Cyanogen]

Hello, I've recently bought the Deputy P40 (awesome laptop btw) but I've ran into some trouble with the external screen.

I've tried every display adapter settings in the bios (Discrete Gpu only which disable entirely the possibility of using an external screen for some reason), MsHybrid, and Dynamic. For every settings the result is the same, the external display is connected to the iGPU through the HDMI port and locked to 60Hz even if the game is rendered at 140Hz+.

For info the GPU driver is updated, I've tried multiple HDMI cables and the screen is a Legion Y25-25 capable of 240Hz with HDMI 2.0.

If someone has an idea I will gladly hear it, thanks in advance!

[JacobP]

Hello there, @Cyanogen 

As both your laptop and your separately purchased monitor both have refresh rates high enough to support 160Hz  it is likely that there is a limiting factor occurring with either the connection cable or the ports.

In order to check this could you provide me the MSN number which can be found on the label of your laptop.

[CrFan]

Hello all,

I am not sure if I should open a new discussion or go on with this one, but @Cyanogen, I have quite the same issue as you.

I bought a LG 27gp850 which I plugged in HDMI (I used the HDMI cable provided with the monitor) to my brand new Erazer Deputy P40 (MSN 30035597) but the refresh rate seems limited to 60hz.

It is weird because in the display panel I can change resolution but not the refresh rate (59,95Hz), and it appears as it only recognizes the integrated GPU (when I open the link "GPU properties for Sreen2", it displays the properties of the integrated GPU) :

However, Windows (11) also seems to recognize the GPU (Geforce RTX 4060) :

Moreover, in the Nvidia configuration panel it appears as the HDMI port (and the integrated monitor) is only linked with the integrated GPU.

I don't know what to do now... Could you please help me !

Thanks in advance

[CrFan]

Hello again,

As mentionned by @Cyanogen , I also tried to boot in "Discrete Gpu" mode and the external monitor is no longer detected by the system. It is as the HDMI port vanished...

Only the integrated monitor remains visible and the GPU (RTX4060) seems to run it now  :

I don't know what to think...

[Yacine7]

Any solution please ? i have the same problem

[Cyanogen]

Hello JacobP,

Thanks for the response and sorry for the delay. The MSN of my laptop is 30035597.

I've tried many different cables and adapters and nothing worked properly; exactly like @CrFan . It feels like the HDMI port is not directly connected to the discrete GPU, I also tried a few spare usb-c adaptors I had (cheap ones i must admit) and the issue was the same.

Cheers, Cyanogen.

[RAZZ]

dear @Cyanogen 

Sorry for the late replay.

Has your issue been resolved?

connecting an external monitor to a laptop and expecting it to have the same MHZ is unlikely. The most likely cause of the issue is that the resolutions of each monitor are different and so the HDMI cannot keep up the same speeds. 

If you are referring to the ribbon between the mainboard and the input ports, this will need to be assessed and tested to see if this is causing the issue.

there are way to many factors to take in when trying to troubleshoot the reported fault, so finding the exact issue will be very difficult with out testing the unit and monitors, and it will be deferent for every user.

thanks 

[Heathy87]

I have this issue, 2x 144hz 1440p monitors, the only thing I haven't tried yet is the mini display port.

The laptop screen is fixed at 144hz 1920x1080.

If you use discrete GPU mode it doesn't detect external monitors. All screens seem to use the igpu. Even the laptop screen is using the igpu at 144hz in mshybrid mode when you go to the adapter properties

I have a male to male (mini) display port cable ordered and ill try one of my screens in the mini display port to see if that will allow a higher refresh rate, using a HDMI to mini display port capped the resolution to 1080p (might be an old hdmi cable or cheap adapter).

It doesn't matter too much to me, although it would be nice to run some games over 60fps on an external screen, being capped at 60hz just means you'll only get at most 60fps and that is about as good as you'll likely get on a 4060 at 1440p. At least in modern games with the detail up high I can't see it maintaining 100+ fps at 1440p without dipping down below that. even if I can get one screen to 144hz its probably only going to make the laptop get hotter.

to get both screens working might require a DP splitter. currently I run one of my screens through the thunderbolt port with a multi-adapter that has 1 hdmi port and several usb ports. I could try a display port multi adapter two+ ports then plug it into the mini dp port, those dp hubs aren't exactly cheap though. 40-50£ i'm seeing. one of my screens is actually running at 72hz it could be that one of my HDMI cables is just old. ill update this when I get the DP cable and try that out.