hal_gpio.so missing RPI5 Debian Trixie

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04 Jan 2026 18:57 #340981 by lumberjack_jeff
hal_gpio.so missing RPI5 Debian Trixie was created by lumberjack_jeff
Hi All:
Using the RPI 2.9.7 image from the download page
www.linuxcnc.org/iso/image_2025-11-10-ra...7-6-trixie-arm64.zip

With RPI5 using a parallel hat
byte2bot.com/blogs/instructions/setting-...35144898857#comments

I get the following error when launching linuxcnc for my configuration:
Debug file information:
Note: Using POSIX realtime
hal_gpio: dlopen: /usr/lib/linuxcnc/modules/hal_gpio.so: cannot open shared object file: No such file or directory
./my-mill.hal:70: waitpid failed /usr/bin/rtapi_app hal_gpio
./my-mill.hal:70: /usr/bin/rtapi_app exited without becoming ready
./my-mill.hal:70: insmod for hal_gpio failed, returned -1
34642
Unexpected realtime delay on task 0 with period 100000
This Message will only display once per session.
Run the Latency Test and resolve before continuing.
Stopping realtime threads
Unloading hal components
Note: Using POSIX realtime

hal_gpio.so does not exist on that install. Is it a file I can download or is it compiled for each system by the image?

I have left a message with the developer of the image (ozzyrob) at
github.com/ozzyrob/linuxcnc-rpi-2.9.7-image-issues/issues/5

... but haven't yet heard anything. Is there a less experimental version of Linuxcnc I should be using?

 
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04 Jan 2026 19:09 #340982 by 3404gerber

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04 Jan 2026 20:43 - 04 Jan 2026 22:28 #340986 by unknown
Replied by unknown on topic hal_gpio.so missing RPI5 Debian Trixie
That issue had been raised before and had been marked as closed as it was an issue with Linuxcnc itself, not with the image. The readme also addressed the issue. Please check the readme, as well as checking both the open and closed issues on GitHub.
As I'm in the process of looking for a new place to live it may be some time before a new image is built.

Was also mentioned here:
github.com/ozzyrob/linuxcnc-rpi-2.9.7-im...ase-12-december-2025

New image releases will also be announced via github. The latest announcement will have links to the latest release.
Last edit: 04 Jan 2026 22:28 by unknown.
The following user(s) said Thank You: lumberjack_jeff

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