←back to thread

Show HN: TinyPilot – Build a KVM over IP using a Raspberry Pi

(mtlynch.io)
756 points mtlynch | 1 comments | 23 Jul 20 13:56 UTC | HN request time: 0.205s | source
Show context
pdimitar ◴[23 Jul 20 22:08 UTC] No.23933014[source]▶
I'll use the opportunity to ask for a KVM switch help here if that's not breaking the board's rules (and I feel it's related to the topic):

I got a company laptop recently and bought an Aten CS782DP KVM switch so I can reuse my gaming PC's monitor on it (using DisplayPort 1.4 cables). But when using my gaming PC the display now flickers very often when gaming and it's driving me crazy. Some people said it's the length of the DP 1.4 cables (they are very short though, <1m), some even say gas spring chairs introduce signal disturbance (wtf?), others say make sure the DP 1.4 cables don't touch any other cables.

In any case: would a KVM switch like the one in the post help? I suspected NVIDIA's G-Sync but turning it off for several days made no difference. :(

For the record, the display runs at 144Hz in both Win10 and Ubuntu. But it only flickers in Win10. The only thing that comes to mind is that the miniDP-to-DP cable that runs from my PC's videocard to the KVM switch is no good -- but not sure. I sadly can't use the KVM switch's DP-to-DP cable because my videocard only has miniDP on its rear.

Anybody had similar struggles in the past?

replies(1): >>23933118 #
techntoke ◴[23 Jul 20 22:14 UTC] No.23933118[source]▶
Have you tried lowering to 60Hz in Windows to see if it helps? What about another switch?
replies(1): >>23933151 #
pdimitar ◴[23 Jul 20 22:16 UTC] No.23933151[source]▶
In the very few games I play 60Hz is way too low so I haven't attempted it at all -- I want the maximum Hz/FPS.

As for another switch, I am open to ideas if you have them. In my local market I was only able to find like 2-3 of them [that support DP 1.4] and they are all north of $250 -- which I don't mind but it would be non-pleasant to buy 5+ of them just to experiment.

Maybe my requirement for DP 1.4 is silly though. Maybe HDMI would be fine.

replies(1): >>23933418 #
techntoke ◴[23 Jul 20 22:34 UTC] No.23933418[source]▶
My guess is that switch simply doesn't support 144Hz, so if it works at 60Hz then you have your answer.
replies(1): >>23933566 #
1. pdimitar ◴[23 Jul 20 22:46 UTC] No.23933566[source]▶
They advertise 4K@60Hz and my display is at 2560x1080 @ 144Hz. Math says my case should be supported but yeah, computer standards are often non-intuitive. I'll try with 120Hz and then 60Hz just to ascertain limits as you suggest. Thanks.