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sipeed / NanoKVM

NanoKVM: Affordable, Multifunctional, Nano RISC-V IP-KVM
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Video update slow #52

Open wilpig opened 5 days ago

wilpig commented 5 days ago

Got my NanoKVM lite in and it's pretty nifty. I am liking the size and was able to get the firmware loaded fine, and with the help of the python script got it to 2.0.7.

I've futzed around with the resolution on my host machine to make them happy and in sync at 1280x720, I bumped the refresh up to 60, tried disabling the frame detection but i'm still only getting screen updates about every 10 - 15 seconds. I have vnc on that system so I could watch and the cursor is keeping up with my movements in the browser just fine it's just the video image that is delayed. Is there a setting i'm missing or is something else at play here that i'm missing?

geerlingguy commented 4 days ago

It seems like I've been hitting the same thing on my Windows desktop—firmware 2.0.7 seems to be very sluggish, compared to 2.0.3 that I was running before.

geerlingguy commented 4 days ago

Found out the issue seems to be related to #40 — I unscrewed the bottom and removed the heatsink, then used a soldering iron to remove the tiny (very tiny) 0 ohm resistor in the little '5V' area.

This fixed the USB power backfeed issue and seemed to not only fix the slowness, but also allow USB HID stuff to work properly.

I also had to set my refresh rate in Windows settings to 24Hz to remove some strange screen tearing that was showing up.