/etc/kvmd/override.yaml when GPIO pin number is 22 web-server not started #230

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opened 2026-02-20 13:22:48 -05:00 by deekerman · 3 comments

deekerman commented

2026-02-20 13:22:48 -05:00

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Originally created by @GrafDe on GitHub (May 3, 2021).

Originally assigned to: @mdevaev on GitHub.

Describe the bug
When i try to use pin 22 in "/etc/kvmd/override.yaml" and restart kvmd i get web-server response "500 Internal Server Error"

#uname -a
Linux pikvm 5.10.23-2-ARCH #1 SMP Thu Mar 18 18:33:35 MSK 2021 armv7l GNU/Linux

this config doesn't work:
#cat /etc/kvmd/override.yaml

kvmd:
    gpio:
        drivers:
            # This example shows how the default __gpio__ driver settings can be changed. It can be omitted if you are fine wit>
            __gpio__:  # Names surrounded by double underscore are system reserved
                type: gpio  # Refers to the plugin name handling the communication
        scheme:
            # Two outputs of RPi's GPIO
            button1:
                pin: 4 # GPIO pin number on the RPi
                mode: output
                #switch: false  # Disable switching, only pulse available
            button2:
                pin: 22 # GPIO pin number on the RPi
                mode: output
                #switch: false # Disable switching, only pulse available
            button3:
                pin: 6 # GPIO pin number on the RPi
                mode: output
                #switch: false  # Disable switching, only pulse available
            button4:
                pin: 26 # GPIO pin number on the RPi
                mode: output
                #switch: false # Disable switching, only pulse available
        view:
            header:
                title: Power Switches  # the menu title
            table:  # The menu items are rendered in the form of a table of text labels and controls
                - ["#Press Power Buttons"]  # Text starting with the sharp symbol will be a label
                - []  # creates a horizontal separator and starts a new table
                - ["#Comp 1:", button1]  # Text label, one input, one button with text "Click"
                - ["#Comp 2:", button2]
                - ["#Comp 3:", button3]
                - ["#Comp 4:", button4]
                - []  # creates a horizontal separator and starts a new

and when i delete button2 with pin 22 all works fine. or i changed pin to another of 22 and all work fine.
#cat /etc/kvmd/override.yaml

kvmd:
    gpio:
        drivers:
            # This example shows how the default __gpio__ driver settings can be changed. It can be omitted if you are fine wit>
            __gpio__:  # Names surrounded by double underscore are system reserved
                type: gpio  # Refers to the plugin name handling the communication
        scheme:
            # Two outputs of RPi's GPIO
            button1:
                pin: 4 # GPIO pin number on the RPi
                mode: output
                #switch: false  # Disable switching, only pulse available
            button3:
                pin: 6 # GPIO pin number on the RPi
                mode: output
                #switch: false  # Disable switching, only pulse available
            button4:
                pin: 26 # GPIO pin number on the RPi
                mode: output
                #switch: false # Disable switching, only pulse available
        view:
            header:
                title: Power Switches  # the menu title
            table:  # The menu items are rendered in the form of a table of text labels and controls
                - ["#Press Power Buttons"]  # Text starting with the sharp symbol will be a label
                - []  # creates a horizontal separator and starts a new table
                - ["#Comp 1:", button1]  # Text label, one input, one button with text "Click"
                - ["#Comp 3:", button3]
                - ["#Comp 4:", button4]
                - []  # creates a horizontal separator and starts a new table

I need use pin 22 because my relay board is use it
link to my relay module https://wiki.keyestudio.com/KS0212_keyestudio_RPI_4-channel_Relay_Shield?spm=a2g0s.imconversation.0.0.1c573e5fYFHbXJ

Originally created by @GrafDe on GitHub (May 3, 2021). Originally assigned to: @mdevaev on GitHub. **Describe the bug** When i try to use pin 22 in "/etc/kvmd/override.yaml" and restart kvmd i get web-server response "500 Internal Server Error" > #uname -a Linux pikvm 5.10.23-2-ARCH #1 SMP Thu Mar 18 18:33:35 MSK 2021 armv7l GNU/Linux this config doesn't work: #cat /etc/kvmd/override.yaml <pre><code>kvmd: gpio: drivers: # This example shows how the default __gpio__ driver settings can be changed. It can be omitted if you are fine wit> __gpio__: # Names surrounded by double underscore are system reserved type: gpio # Refers to the plugin name handling the communication scheme: # Two outputs of RPi's GPIO button1: pin: 4 # GPIO pin number on the RPi mode: output #switch: false # Disable switching, only pulse available button2: pin: 22 # GPIO pin number on the RPi mode: output #switch: false # Disable switching, only pulse available button3: pin: 6 # GPIO pin number on the RPi mode: output #switch: false # Disable switching, only pulse available button4: pin: 26 # GPIO pin number on the RPi mode: output #switch: false # Disable switching, only pulse available view: header: title: Power Switches # the menu title table: # The menu items are rendered in the form of a table of text labels and controls - ["#Press Power Buttons"] # Text starting with the sharp symbol will be a label - [] # creates a horizontal separator and starts a new table - ["#Comp 1:", button1] # Text label, one input, one button with text "Click" - ["#Comp 2:", button2] - ["#Comp 3:", button3] - ["#Comp 4:", button4] - [] # creates a horizontal separator and starts a new</code></pre> and when i delete button2 with pin 22 all works fine. or i changed pin to another of 22 and all work fine. #cat /etc/kvmd/override.yaml <pre><code>kvmd: gpio: drivers: # This example shows how the default __gpio__ driver settings can be changed. It can be omitted if you are fine wit> __gpio__: # Names surrounded by double underscore are system reserved type: gpio # Refers to the plugin name handling the communication scheme: # Two outputs of RPi's GPIO button1: pin: 4 # GPIO pin number on the RPi mode: output #switch: false # Disable switching, only pulse available button3: pin: 6 # GPIO pin number on the RPi mode: output #switch: false # Disable switching, only pulse available button4: pin: 26 # GPIO pin number on the RPi mode: output #switch: false # Disable switching, only pulse available view: header: title: Power Switches # the menu title table: # The menu items are rendered in the form of a table of text labels and controls - ["#Press Power Buttons"] # Text starting with the sharp symbol will be a label - [] # creates a horizontal separator and starts a new table - ["#Comp 1:", button1] # Text label, one input, one button with text "Click" - ["#Comp 3:", button3] - ["#Comp 4:", button4] - [] # creates a horizontal separator and starts a new table</code></pre> I need use pin 22 because my relay board is use it link to my relay module https://wiki.keyestudio.com/KS0212_keyestudio_RPI_4-channel_Relay_Shield?spm=a2g0s.imconversation.0.0.1c573e5fYFHbXJ

deekerman

2026-02-20 13:22:48 -05:00

closed this issue
added the
resolution:fixed

type:question
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deekerman commented

2026-02-20 13:22:51 -05:00

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@mdevaev commented on GitHub (May 3, 2021):

This is not a bug. Pin 22 is used for the HDD activity indicator. If you look to journalctl -u kvmd, you will see that kvmd cannot start because your configuration conflicts with the default settings. To use pin 22, you need to move the ATX function to another location (or disable it altogether) using override:

kvmd:
    atx:
        hdd_led_pin: N

Or:

kvmd:
    atx:
        type: disabled

Use kvmd -m to view entire config.

@mdevaev commented on GitHub (May 3, 2021): This is not a bug. Pin 22 is used for the HDD activity indicator. If you look to `journalctl -u kvmd`, you will see that kvmd cannot start because your configuration conflicts with the default settings. To use pin 22, you need to move the ATX function to another location (or disable it altogether) using override: ```yaml kvmd: atx: hdd_led_pin: N ``` Or: ```yaml kvmd: atx: type: disabled ``` Use `kvmd -m` to view entire config.

deekerman commented

2026-02-20 13:22:51 -05:00

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@GrafDe commented on GitHub (May 3, 2021):

tanks, is work
i was change in /etc/kvmd/main.yaml