Strobing with EZCOO Switch #126

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opened 2026-02-20 13:20:41 -05:00 by deekerman · 5 comments

deekerman commented

2026-02-20 13:20:41 -05:00

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Originally created by @ibivibiv on GitHub (Jan 15, 2021).

Originally assigned to: @mdevaev on GitHub.

Describe the bug
On both a USB and Camera port build I get a strobing of the video when connecting an EZCOO KVM switch. The EZCOO switch works fine with a TV and the PiKVM works fine direct connected. The minute I connect the two no matter what type of device I connect to the EZCOO port the image over the webserver flashes. I've tried a variety of resolution and refresh settings and it doesn't seem to make a difference. I'm wondering if anyone else has had this happen?

To Reproduce
Steps to reproduce the behavior, like:

Connect devices to EZCOO KVM Switch
Connect Output of EZCOO to PiKVM
Start KVM in web console
Image Flashes from black to visible every few seconds then immediately back to black for a few seconds

Expected behavior
stable image

Desktop (please complete the following information):

OS: Ubuntu 20.04
Browser firefox
Version: pulled master
VNC client (if used)

Pi-KVM info:

Raspberry Pi board Pi 4
Pi-KVM platform = tried both
Video capture type tried both
KVMD version: 2.14-1
uStreamer version: 3.5.1
Linux kernel: Linux pikvm 5.4.83-5-ARCH #1 SMP PREEMPT Sun Jan 3 16:11:27 UTC 2021 armv7l GNU/Linux

Additional context
Add any other context about the problem here.

Originally created by @ibivibiv on GitHub (Jan 15, 2021). Originally assigned to: @mdevaev on GitHub. **Describe the bug** On both a USB and Camera port build I get a strobing of the video when connecting an EZCOO KVM switch. The EZCOO switch works fine with a TV and the PiKVM works fine direct connected. The minute I connect the two no matter what type of device I connect to the EZCOO port the image over the webserver flashes. I've tried a variety of resolution and refresh settings and it doesn't seem to make a difference. I'm wondering if anyone else has had this happen? **To Reproduce** Steps to reproduce the behavior, like: 1. Connect devices to EZCOO KVM Switch 2. Connect Output of EZCOO to PiKVM 3. Start KVM in web console 4. Image Flashes from black to visible every few seconds then immediately back to black for a few seconds **Expected behavior** stable image **Desktop (please complete the following information):** - OS: Ubuntu 20.04 - Browser firefox - Version: pulled master - VNC client (if used) **Pi-KVM info:** - Raspberry Pi board Pi 4 - Pi-KVM platform = tried both - Video capture type tried both - KVMD version: 2.14-1 - uStreamer version: 3.5.1 - Linux kernel: Linux pikvm 5.4.83-5-ARCH #1 SMP PREEMPT Sun Jan 3 16:11:27 UTC 2021 armv7l GNU/Linux **Additional context** Add any other context about the problem here.

deekerman

2026-02-20 13:20:41 -05:00

closed this issue
added the
resolution:wontfix

type:question
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deekerman commented

2026-02-20 13:20:44 -05:00

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@ibivibiv commented on GitHub (Jan 15, 2021):

On a whim I just put an hdmi audio normalizing box inline between the ezcoo and the HDMI in (USB right now). It is working. I am guessing something is afoul between the output of the ezcoo and the input of the PiKVM. If you feel like closing this you can, at least this will help someone else in the future if they hit this same issue. Maybe its a flaky ezcoo? Something with that hotplugging mentioned in the markdown docs?

@ibivibiv commented on GitHub (Jan 15, 2021): On a whim I just put an hdmi audio normalizing box inline between the ezcoo and the HDMI in (USB right now). It is working. I am guessing something is afoul between the output of the ezcoo and the input of the PiKVM. If you feel like closing this you can, at least this will help someone else in the future if they hit this same issue. Maybe its a flaky ezcoo? Something with that hotplugging mentioned in the markdown docs?

deekerman commented

2026-02-20 13:20:44 -05:00

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@mdevaev commented on GitHub (Jan 16, 2021):

I heard something from ezcoo users that if the switch is powered after booting pikvm, then everything will be fine. Can you confirm that?

@mdevaev commented on GitHub (Jan 16, 2021): I heard something from ezcoo users that if the switch is powered after booting pikvm, then everything will be fine. Can you confirm that?

deekerman commented

2026-02-20 13:20:44 -05:00

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@mdevaev commented on GitHub (Jan 28, 2021):

Sup?

@mdevaev commented on GitHub (Jan 28, 2021): Sup?

deekerman commented

2026-02-20 13:20:44 -05:00

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@mdevaev commented on GitHub (Feb 15, 2021):