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Laptop: Lenovo IdeaPad Gaming 3 15IHU6
You can only connect an external monitor via HDMI. The USB-C port does not transmit video.
HDMI 2.0: 3840 x 2160 @ 60Hz RGB 8-bit TMDS = 18 Gbps
Monitor: BenQ MOBIUZ Gaming Monitor EX240N
- 1920 x 1080 @ 165 Hz 8-bit CVT-RB = 12 Gbps
- 1 x HDMI 2.0
- 1 x DisplayPort 1.2
- VESA AdaptiveSync
The video bandwidth is sufficient. Please use the graphics drivers that Lenovo offers for download:
- Intel VGA Driver for Windows 10 (64-bit): 31.0.101.4502
- Nvidia VGA Driver for Windows 10 (64-bit): 31.0.15.2904
If that doesn't help, then please create a Report for Intel Graphics Drivers and attach the output file here.
The report shows that the monitor data is being received correctly.
The yellow parameters deviate from the VESA standard Coordinated Video Timing - Reduced Blanking (CVT-RB), but that shouldn't be a problem with the HDMI 2.0 bandwidth.
1080p @ 144 Hz = 325.08 MHz = 54% HDMI 2.0
1080p @ 165 Hz = 380.96 MHz = 64% HDMI 2.0
If you are currently using a "High Speed HDMI Cable", which corresponds to version 1.4, then you can of course try an HDMI 2.0 cable ("Premium High Speed HDMI Cable").
If that doesn't help either, you should ask Lenovo Support, referring to this thread, what this HDMI connector actually supports. The Original Equipment Manufacturer (OEM = Lenovo in this case) has the final say in this regard, not the capabilities of the graphics integrated in the Intel processor.
Could you please confirm if the issue was actually resolved? I’m facing the same problem, but my monitor is an LG ULTRA GEAR 24' 180Hz 24GS60F-B. I’ve already purchased a premium high-speed cable, model ELG HS8K20. I’ve tested with both the manufacturer’s drivers and the latest reference drivers. I’d like to support at least 144Hz, but 165 or 180Hz would be great as well. Attached is the report.
Note that the maximum that shows up is 120Hz.
I even tried checking through third-party software, and the resolution shows up.
If possible, please provide me with a solution.
Yes, the monitor's capabilities transmitted via the Display Data Channel (DDC) in the HDMI cable arrive in both the Intel driver and the Windows registry (in your case read with CRU).
HDMI 2.0 MAX = 600 MHz
This corresponds exactly to the video timing according to VESA CVT-RB. I can therefore only assume that the HDMI connector on this device is not capable of outputting resolutions and refresh rates that are not included in the Consumer Technology Association (CTA) standards. 1080p @ 120 Hz is the maximum in the CTA-861 timing table, Video Identification Code (VIC) = 63.
Since this monitor information is already carried in the base block of the EDID, I don't think you can achieve anything with CRU. To be sure, you have to contact the manufacturer of the device. The HDMI retimer (PS8409A) on the motherboard may be a limitation, since retimer devices are protocol-aware and -dependent. Such chips are basically required to bring the video signal from the processor integrated graphics to the physical connector by recovering the data, extracting the embedded clock and retransmitting a fresh copy of the data using a clean clock. As mentioned, however, It is just possible that in the case of HDMI only the CTA-861 formats are supported, which excludes 144 Hz and higher.
The monitor's EDID shows:
When I apply your monitor's EDID in my simulation environment for my Iris Xe in the NUC11, everything can be set up to 144 Hz under Windows 11 23H2 with driver 32.0.101.6647.
The receiving device shows the following in the signal diagnostics:
I'm afraid you'll have to contact Lenovo Support about your issue. It doesn't seem to be related to the generic Intel drivers. If it works under Linux, there's obviously a Lenovo-specific firmware issue preventing it from working under Windows. The resolution you've set of 2560 x 1440 @ 75 Hz in the EDID's first block requires a pixel clock of 295 MHz, which is still within the HDMI 1.4 range.
