ASUS Rog strix scar 2025 G18 5090 external monitor issues

[Cmoney12343]

Hello esteemed gamers,

Please forgive me if I’m not following forum etiquette or if my post is lacking or difficult to follow— this is my first post to any forum ever and I’m not a very technical guy. That being said, I’ll do my best to explain my issue:

I have the 2025 ROG strip scar g18 with a 5090. The machine runs flawlessly by itself, but has problems when connected to an external monitor. The time frame varies, but essentially what happens is the external monitor loses signal at some point, and typically after that the laptop crashes at some point. If I disconnect the hdmi cable or adjust display settings after the external monitor loses signal, the laptop almost always immediately crashes. I’ve tried factory resetting, updating drivers, ASUS diagnostic tools, new cables and different cable types,  geek squad tech support and I’ve not been able to permanently solve the issue. This issue persists across all monitors/TVs. It’s worth noting that prior to the geek squad remote support taking over my pc and doing their thing, the issue was way worse and would happen almost every time I used the laptop with the monitor, often times within minutes of startup. Additionally, the laptop would do this thing where the laptop’s monitor would become corrupted after some time either before or after the external monitor lost signal and display this sort of blue static—picture attached. If the laptops monitor became corrupted before the external monitor lost signal, I would still be able to use the laptop through the external monitor. Since the Best Buy people took a look at it(and tbh have no idea what they did) the issue probably happens 20% of the time, and the laptop monitor hardly does the blue static thing. Has anybody had any issues similar to this? And if so, what’s been the best fix?

Thanks for coming to my Ted talk and let me know how I could improve with my forum posts.

Product link below:

https://rog.asus.com/laptops/rog-strix/rog-strix-scar-18-2025/

pictures:

 

 

these pictures are mostly of the laptop monitor glitching out before external monitor signal loss, but it just as often happened the other way around, I just didn’t grab any pics.

[ROGn8ysleqg464p]

I have that kind of issue. My laptop which is the same spec as yours having random signal lost while I'm using external monitor with HDMI port. First I thought it might be the cable which I use HDMI to displaypprt. Then I switched different HDMI to HDMI and still,  random signal lost  happens sometimes. I tried all of my HDMI cables with MacBook and no issues with cable or monitor. Looks like Asus needs to address this issue. 

[Yajukun]

Has anyone found a solution for this blank/garbled external monitor issue? My 16 inch 2025 Scar (5090) has the same issue when I use stable diffusion. The HDMI port goes blank for a few seconds the resumes. Once in a great while I also get the white snow screen that requires me to disconnect/reconnect the HDMI port. My laptop screen itself does not seem to be affected. 

[Falcon2_ROG]

@chiromineski 
May I ask what is the full model name of your laptop?
What are the current BIOS version, system version, and graphics driver version of your laptop?
What is the brand and model of your external monitor? Is the cable used provided by the monitor manufacturer, or was it purchased separately?
If it was purchased separately, could you please provide the brand and model of the cable?

[chiromineski]

@

@Falcon2_ROG 
ROG Strix SCAR 18 G835LW-SA080QW

Intel(R) Core(TM) Ultra 9 275HX
NVIDIA GeForce RTX 5080 Laptop GPU 16GB Vram
Display: 2560x1600 240hz = 16.10 aspect ratio // WQXGA // 4x of 1024x768
32GB RAM
BIOS Version: V325

Monitor: DELL P2222H
Full HD (1080p) 1920 x 1080 at 60 Hz

HDMI Cable: UGREEN

[Falcon2_ROG]

@chiromineski 
Please kindly reconfirm the graphics driver version currently used on your laptop.
If the installed graphics driver is not provided by us, we recommend uninstalling it and then downloading and installing the driver from the download section on our official website.
Additionally, please check if using the cable provided by the monitor manufacturer improves the situation.
If the issue persists, please provide photos or videos showing how the laptop is connected to the monitor, as well as any images or videos of the problem.
We apologize for any inconvenience caused.

[chiromineski]

Hi!
I purchased this laptop from ASUS Official store so I am only using NVIDIA Graphics drivers - GeForce Game Ready Driver ver. 581.80.

How the laptop is connected to the monitor? It is connected via HDMI Cable directly to the monitor, no fancy set up there.
The issues I am experiencing are all the same as what posted here so  what posted here in the photos is also what I am experiencing. 

I turned off Gsync everytime I use the externak monitor and so far that somehow resolves the problem but I will observe. 

[chiromineski]

Sad no response from ROG Team.

[Slytha]

I am in talks with Asus Support, they are investigating and trying to reproduce, so every evidence, details and kernel memory dumps that you guys can gather are welcome.

See also:
https://rog-forum.asus.com/t5/gaming-notebooks/rog-strix-scar-16-rtx-5090-nvlddmkm-sys-crashes-with-...
https://rog-forum.asus.com/t5/gaming-notebooks/randomly-losing-all-usb-devices/m-p/1123551#M12302

https://github.com/Zephkek/Asus-ROG-Aml-Deep-Dive/issues/47
https://github.com/Zephkek/Asus-ROG-Aml-Deep-Dive

https://community.intel.com/t5/Graphics/High-ACPI-sys-DPC-Latency-gt-34-000%C2%B5s-on-new-ASUS-ROG-S...
https://community.intel.com/t5/Graphics/Intel-Gfx-Display-External-error/td-p/1721977

[Silent_Scone]

Hi @Cmoney12343,

can you please provide a memory dump and AsLogDumpTool log and PM it to me, or upload it here if possible.

 You can find the AsLogDumpTool on your devices at the following path. Simply double-click the file and share the generated .wim log C:\Program Files\ASUS\AsLogDumpTool\AsLogDumpTool2.exe