Created attachment 174094 [details]
output from kscreen-doctor -o"

60hz for a 4k screen requires HDMI 2.0 (or later). This means that the GPU, computer, cable, and monitor all have to support that version of HDMI, or a later one. If any link in the chain does not, then it will degrade to the oldest supported version of HDMI, which is likely 1.4. And HDMI 1.4 only supports 4K screens at 30hz. So I suspect this is what's happening.

Can you check?

(In reply to Nate Graham from comment #2)
> 60hz for a 4k screen requires HDMI 2.0 (or later). This means that the GPU,
> computer, cable, and monitor all have to support that version of HDMI, or a
> later one. If any link in the chain does not, then it will degrade to the
> oldest supported version of HDMI, which is likely 1.4. And HDMI 1.4 only
> supports 4K screens at 30hz. So I suspect this is what's happening.
> 
> Can you check?

I have used the laptop at 4k@60Hz with other monitors.  Same w/the cables.  Everything worked fine on my older ThinkPad.  This P16v G2 is new and should do min 6k, maybe 8k.  I'm seeing same behavior on HDMI and DP.  Looks like correct EDID data appears but is not honored:

# monitor-edid
Name: LEN P32p-20
EISA ID: LEN62a2
EDID version: 1.4
EDID extension blocks: 1
Screen size: 69.7 cm x 39.2 cm (31.48 inches, aspect ratio 16/9 = 1.78)
Gamma: 2.2
Digital signal
Max video bandwidth: 600 MHz

        HorizSync 30-160
        VertRefresh 23-76

        # Monitor preferred modeline (60.0 Hz vsync, 133.3 kHz hsync, ratio 16/9, 139 dpi)
        ModeLine "3840x2160" 533.25 3840 3888 3920 4000 2160 2163 2168 2222 -hsync +vsync

Notice that in the screen-doctor output it's setting 30 Hz for ALL resolutions.  Odd.

Thanks lot for the info.

Please attach the output of drm_info

Created attachment 174120 [details]
drm_info output

Notice the max 30hz modes...

│   ├───Connector 5
│   │   ├───Object ID: 286
│   │   ├───Type: DisplayPort
│   │   ├───Status: connected
│   │   ├───Physical size: 700×390 mm
│   │   ├───Subpixel: unknown 
│   │   ├───Encoders: {16} 
│   │   ├───Modes
│   │   │   ├───3840×2160@30.00 driver phsync pvsync 16:9 
│   │   │   ├───3840×2160@29.97 driver phsync pvsync 16:9
│   │   │   ├───3840×2160@29.98 driver phsync nvsync

Yeah, those are the modes exposed by the kernel, which is why KWin doesn't offer you a 60Hz mode either.
This is most likely a driver bug, which you can report at https://gitlab.freedesktop.org/drm/i915/kernel/-/issues

(In reply to Zamundaaa from comment #9)
> This is most likely a driver bug, which you can report at
> https://gitlab.freedesktop.org/drm/i915/kernel/-/issues

Do you think it's an i915 or Nvidia bug?

# inxi -G
Graphics:
  Device-1: Intel Meteor Lake-P [Intel Arc Graphics] driver: i915 v: kernel
  Device-2: NVIDIA AD107GLM [RTX 1000 Ada Generation Laptop GPU]
    driver: nvidia v: 560.35.03
  Device-3: Logitech HD Pro Webcam C920 driver: snd-usb-audio,uvcvideo
    type: USB
  Device-4: Luxvisions Innotech Integrated Camera driver: uvcvideo type: USB
  Display: server: X.Org v: 24.1.2 with: Xwayland v: 24.1.2 driver: X:
    loaded: modesetting dri: iris gpu: i915 resolution: 1: 6144x3456~30Hz
    2: 3840x2400~60Hz
  API: EGL v: 1.5 drivers: iris,swrast platforms: gbm,x11,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: nvidia mesa v: 560.35.03
    renderer: NVIDIA RTX 1000 Ada Generation Laptop GPU/PCIe/SSE2
  API: Vulkan v: 1.3.290 drivers: N/A surfaces: xcb,xlib

# more /etc/environment 
KWIN_DRM_DEVICES=/dev/dri/card1:/dev/dri/card0
KWIN_DRM_NO_AMS=1
KWIN_FORCE_SW_CURSOR=1
__GL_SHOW_GRAPHICS_OSD=1
__GLX_VENDOR_LIBRARY_NAME=nvidia
__NV_PRIME_RENDER_OFFLOAD=1
__VK_LAYER_NV_optimus=NVIDIA_only