S2721DGF, Manjaro, Nvidia RTX 3060, scren blinks black

[vfbsilva]

Just installed my new monitor, all settings seem fine I'm running 165Hz. From time to time it seems to lose contact/reset/turn dark, but returns. I've observed it at the moment just in Linux using Nvidia driver: 515.65.01. It does not seem to be a system config since I had never suffered with the old monitor and have changed not settings. Sample of the issue.
More people with same issue:

• https://forums.tomshardware.com/threads/dell-s2721dgf-turns-on-and-off-randomly.3688755/
• https://forums.whirlpool.net.au/archive/9vy7kp73
• https://www.dell.com/community/Monitors/S2721DGF-random-black-screen-few-seconds-at-a-time/td-p/7987...

What might be wrong?

PC:
System:
Kernel: 5.19.1-3-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 12.1.1
Desktop: KDE Plasma v: 5.24.6 Distro: Manjaro Linux base: Arch Linux
Machine:
Type: Desktop Mobo: Micro-Star model: Z390-A PRO (MS-7B98) v: 1.0
serial: <superuser required> UEFI: American Megatrends v: 1.D0
date: 01/19/2021
CPU:
Info: 6-core model: Intel Core i5-9600K bits: 64 type: MCP
arch: Coffee Lake rev: C cache: L1: 384 KiB L2: 1.5 MiB L3: 9 MiB
Speed (MHz): avg: 4453 high: 4493 min/max: 800/4700 cores: 1: 4488
2: 4473 3: 4404 4: 4464 5: 4493 6: 4400 bogomips: 44412
Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
Device-1: Intel CoffeeLake-S GT2 [UHD Graphics 630] vendor: Micro-Star MSI
driver: i915 v: kernel arch: Gen-9.5 bus-ID: 00:02.0
Device-2: NVIDIA GA106 [GeForce RTX 3060] vendor: eVga.com.
driver: nvidia v: 515.65.01 arch: Ampere bus-ID: 01:00.0
Device-3: Logitech Logitech Webcam C925e type: USB
driver: snd-usb-audio,uvcvideo bus-ID: 1-9.4:7
Display: x11 server: X.Org v: 21.1.4 with: Xwayland v: 22.1.3 driver: X:
loaded: nvidia gpu: i915,nvidia resolution: 2560x1440
OpenGL: renderer: NVIDIA GeForce RTX 3060/PCIe/SSE2 v: 4.6.0 NVIDIA
515.65.01 direct render: Yes
GPU is a Nvidia RTX 3060 from Asus.
Monitor mode: Dell S2721DGF

 

[KGIII]

Hmm... Let's cover a bit of a basic question.

Are you using the same HDMI cable?

I had one monitor that was really sensitive and I really had to make sure the cable was seated with far more force than one might think. So, there's that as well. Any vibration or movement would cause exactly what you're seeing there.