Issue with 3440 x 1440

[pgammel]

I am using a display port splitter to split my screen between my external monitor and Sipeed Nano KVM. There is no option to select 3440 x 1440, and the display on the nano KVM shows back when I connect it via active DP to HDMI adapter. I've tried several adapter combos, and I still can't get it to work properly.

[ChokunPlayZ]

1920x1080 is the hard limit, the capture chip just can't go higher than this (I might be wrong).
from my research you can make it work, you'll need a "Downscaler".
I found a few devices out there, some have built in spliter and you can pick which output you want to scale down to 1080p.

[pgammel]

Would you mind posting an example? I’m having a hard time finding something. I’ve done several searches.

…

On Fri, Feb 21, 2025 at 8:56 AM Yanavut Rojanapron ***@***.***> wrote: 1920x1080 is the hard limit, the capture chip just can't go higher than this (I might be wrong). from my research you can make it work, you'll need a "Downscaler". I found a few devices out there, some have built in spliter and you can pick which output you want to scale down to 1080p. — Reply to this email directly, view it on GitHub <#339 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AB66LUXS4P7YZE6DHOXAFH32Q5LDFAVCNFSM6AAAAABXRRRRJWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMNZVGA3TGNZUGQ> . You are receiving this because you authored the thread.Message ID: ***@***.***> [image: ChokunPlayZ]*ChokunPlayZ* left a comment (sipeed/NanoKVM#339) <#339 (comment)> 1920x1080 is the hard limit, the capture chip just can't go higher than this (I might be wrong). from my research you can make it work, you'll need a "Downscaler". I found a few devices out there, some have built in spliter and you can pick which output you want to scale down to 1080p. — Reply to this email directly, view it on GitHub <#339 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AB66LUXS4P7YZE6DHOXAFH32Q5LDFAVCNFSM6AAAAABXRRRRJWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMNZVGA3TGNZUGQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[ChokunPlayZ]

here's the one I found, it has a built in spliter, can scale down 4K to 1080p.

[superphreak4]

That looks like the splitter Wendell showed in his video. Might have some info to help
https://youtu.be/5ZQra087xOU?t=7m13s

[pgammel]

here's the one I found, it has a built in spliter, can scale down 4K to 1080p.

I've tried that, but it does not output in 3440x1440 for my monitor. I tried several HDMI splitters (I can provide links if necessary) and none of them were able to output to monitors native resolution.

Here's a diagram of what I'm trying to do if it helps-

[ChokunPlayZ]

have you tried this?

DP spliter -> DP to HDMI -> HDMI Scaler -> NanoKVM
-> Monitor

the main output of the DP Spliter goes to your monitor, the secondary goes to the scaler.

[pgammel]

Yes, but only on the DP splitter. I will order the one Wendell shows in his video, but I'm pretty sure it won't output 3440x1440 correctly to my monitor.

[pgammel]

I just updated to 2.2.1 and it fixed the issue! I was on 2.2.0 before that.

For those interested:

I used this Monoprice DP Splitter https://www.amazon.com/dp/B074KTC3L6?ref=ppx_yo2ov_dt_b_fed_asin_title
(Monoprice 1x2 DisplayPort Splitter, 4K@60Hz, 21.6Gbps)

and this HDMI converter from Club 3D https://www.amazon.com/dp/B077JB28KM?ref=ppx_yo2ov_dt_b_fed_asin_title
(Club 3D CAC-1080 DisplayPort 1.4 to HDMI 2.0b HDR Active Adapter M/F)