Another G9 Problem With L1 KVM

The G9 can be a pain in the butt. It really put a damper on the excitement of getting a 3090 after years of being out of stock.

I’m 99% certain it’s at fault. Without the KVM, things like enabling GSync in the OSD can cause it to lose the input connection from the 3090. And since you need a working input to change settings on a G9…:rage:

My old setup was rock solid:

  • Titan Xp →
  • 200cm L1 DP cable →
  • L1KVM →
  • 120cm L1 DP Cable →
  • Samsung G9 (120 Hz w/ GSync enabled)

After I swapped the Titan Xp for the 3090, I had to do a silly, clean reinstall of the NVidia driver.

I never got it to work through the KVM with GSync. I’d get half a second of video before it’d lose input for 30 seconds to 5 minutes.

Using my 2nd PC to disable GSync, I was able to get video from the 3090 thru the KVM again, but with a random jitter every few seconds. It would glitch and shake/jump to the right consistently at 60, 120, and 240 Hz settings, but not at ~119.997.

I didn’t write down the exact Hz, but one time I opened adv adapter properties and something like 119.999 was selected with an option to change it to 119.997.

That made the screen shake disappear and everything was perfectly stable thru the KVM for a day or two, but the next time I tinkered that Hz setting went away and never returned.

Also, I updated the G9 firmware to M-T9545GGAA-1015.2 at some point, but nothing changed. For now, I’m having to bypass the KVM.

Kinda freaky. I didn’t update the fw yet but I have a g9 neo.

I was just updating the drivers from Nvidia .com and noticed they pulled .17 for the 3090ti. When searching for drivers it didn’t find anything weirdly. Not sure if related.

Maybe worth trying fibbr fiber optic dp cables.

In general over the last year Nvidias studio drives have been more stable than GeForce when your display is capable of Dsc.

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Yeah, I usually go with the studio driver. I’m on the latest n greatest 0.8 GB driver package.

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Replace the 200 cm with a Fibbr and keep using your 120 cm? Or replace both? Amz has the 10’ silver ones for $70 a pop.

Try just one first

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@wendell the Fibbr cable fixed it :white_check_mark::

  • 3090 →
  • $70 10’ Fibbr Cable
  • L1KVM →
  • 120cm L1 DP Cable →
  • Samsung G9 (240 Hz w/ GSync enabled)

To recap, this worked :white_check_mark::

  • Titan Xp →
  • 200cm L1 DP cable →
  • L1KVM →
  • 120cm L1 DP Cable →
  • Samsung G9 (120 Hz w/ GSync enabled)

No work :x::

  • 3090 →
  • 200cm L1 DP cable →
  • L1KVM →
  • 120cm L1 DP Cable →
  • Samsung G9 (any Hz w/ GSync enabled)

Glitchy :facepalm::

  • 3090 →
  • 200cm L1 DP cable →
  • L1KVM →
  • 120cm L1 DP Cable →
  • Samsung G9 (120 Hz w/ GSync disabled)

Work :white_check_mark::

  • 3090 →
  • 200cm L1 DP cable →
  • Samsung G9 (240 Hz w/ GSync enabled)

The 3090 was using Studio Driver 512.15 on Windows 10. The G9 was on firmware M-T9545GGAA-1015.2.

L1 DP cables

L1 1.4 Display Port KVM Switch 5Gig