LinuxCNC Meetup in Stuttgart

Tue, 25 Aug 2026 08:30:00 -0600

There will be a meeting of LinuxCNC developers, users, and enthusiasts in Stuttgart, Germany, during the weekend from Friday September 11-13 2026. This will be a pretty informal meeting, there is no registration, no entrance fee, no badges, no speakers, and no set agenda. It is a chance for people interested in LinuxCNC to meet each other, show off their projects, and talk about issues, fears, hopes, and dreams. Details and signup here: https://nuudel.digitalcourage.de/vspDHX2Qh6bWTDNV

LinuxCNC 2.9.10 released

Thu, 09 Jul 2026 15:37:00 -0600

LinuxCNC 2.9.10 has been released.

“What happened to 2.9.9?” you might ask. The answer is that it was briefly released then withdrawn when it was found that a bug-fix had broken existing configs which were working-round the bug. Context in this forum thread

Changelog for 2.9.10:

Merge pull request #4219 from grandixximo/fix/4216-applied-tlo-params
tests: restore #5401-#5409 loaded-offset assertions
interp: split loaded vs applied tool offset params (#5401-#5409, #5081-#5089)
Merge pull request #4211 from BsAtHome/fix_libboost_python-versioning-2.9
build: Select the libboost_python matching the python version.

And here is the 2.9.9 release note:

This is a bugfix, feature improvement, and security enhancement release.

To address the last part first, it has been noted by two separate people that a weakness in the RTAPI allows for privilege escalation as it runs as setuid root (to give direct access to hardware). Given the use-case for most LinuxCNC machines this is unlilely to be a problem in the majority cases; most hobby users will have root access anyway. The issue has been patched in both 2.9 and in the development branch.

Abbreviated Changelog for 2.9.9:

Merge pull request #4190 from tzuohann/check_config-2.9-datatypes
Merge pull request #4188 from grandixximo/fix/genclean-soname-2.9
Merge pull request #4122 from Sigma1912/2_9_gremlin_initialize_with_current_modal_gcodes
Merge pull request #4168 from grandixximo/backport/machine-coord-params-2.9
Merge pull request #4176 from hdiethelm/ci_doc_build_2.9
check_config: assert INI datatypes before comparing limits
Various CI improvements (little user impact)
Merge pull request #4166 from grandixximo/fix-4165-emccalib-iniref
interp: expose absolute machine position as #5021-#5029
emccalib: ignore ini refs embedded in pin names
Touchy: Backport updates from master
Merge pull request #4164 from grandixximo/backport/3996-tool-offset-params-2.9
tests: update tool offset assertions for #5401-#5409 applied semantics
docs: G38 probe to machine-coordinate conversion via #5401-#5409
interp: make #5401-#5409 the applied tool length offset
halscope improvements
gremlin: Initialize preview interpreter with active modal gcodes
Merge pull request #4022 from wucke13/dev/wucke13/backport-preempt-rt-detection-for-6.12-and-later
Merge pull request #4015 from grandixximo/fix/3994-axis-touchoff-jog-2.9
axis gui improvements
Improvements in Xenomai realtime support
Fix rtapi_app: Sanitize name for module addresses
radiobutton: A new HAL component to select between mutually-exclusive states
halshow: fix broken menu item: Watch -> Add pin/signal/parameter
Fix Gmoccapy screen resizing issue #3899
rtapi: Refuse to load uspace components missing rtapi_app_exit
Merge pull request #3898 from NTULINUX/2.9_libedit
Move python3-poppler-qt5 to “Suggests” addresses Debian bug #1129683
Move python3-poppler-qt5 to “Recommends”. Issue #3872 addresses Debian bug #1129683
Merge pull request #3790 from mark-v-d/2.9 (lathe cycles)
hm2_modbus fixes
fix: emc/canterp: passing right value for SPINDLE_ORIENTATION
Adding testcase for 6bf62870da5866a237bdd8531e28f33644255164 endless loop in g71 fix.
If statement should not be nested. This causes the hal component to ignore the enable state of each axis range.
qtdragon - various updates
gmoccapy - various updates

The full changelog can be found at https://github.com/LinuxCNC/linuxcnc/blob/2.9/debian/changelog

As usual I would like to thank all the LinuxCNC developers and testers, especially the following who contributed directly to this release:

Alec Ari
Bertho Stultiens
BsAtHome
CMorley
david mueller
Hannes Diethelm
Hans Unzner
Jerry Trantow
Luca Toniolo
Mark
mark-v-d
Roy
Sean Froome
Steffen Moeller
tzuohann

The LinuxCNC repositories have been updated for Buster, Bullseye, Bookworm, Trixie and Sid.

Note that released debs are also now available on the LinuxCNC GitHub under “Releases”: www.github.com/https://github.com/LinuxCNC/linuxcnc

Happy Machining!

LinuxCNC 2.9.9 WITHDRAWN

Fri, 03 Jul 2026 17:22:00 -0600

LinuxCNC 2.9.9 has been WITHDRAWN

Please do not update to 2.9.9 if you use probing routines. A fix to a long-standing bug has broken many probing routnes that were working around the bug. Context here https://forum.linuxcnc.org/38-general-linuxcnc-questions/58927-g38-2-weird-behaviour

2.9.10 fixes this and can be downloaded from github: https://github.com/LinuxCNC/linuxcnc/releases/tag/v2.9.10

Unfortunately I am having a problem with the archive signing key for Trixie onwards and so haven’t been able to release to the repositories yet.

Please bear with me while I attempt to sort this out.

Andy Pugh, Incompetent Release Manager.

LinuxCNC 2.9.9 released

Sun, 28 Jun 2026 09:02:00 -0600

LinuxCNC 2.9.9 has been released.

This is a bugfix, feature improvement and security enhancement release.

To address the last part first, it has been noted by two separate people that a weakness in the RTAPI allows for privilege escalation as it runs as setuid root (to give direct access to hardware). Given the use-case for most LinuxCNC machines this is unlilely to be a problem in most cases; most hobby users will have root access anyway. The issue has been patched in both 2.9 and in the development branch.

Abbreviated Changelog:

Merge pull request #4190 from tzuohann/check_config-2.9-datatypes
Merge pull request #4188 from grandixximo/fix/genclean-soname-2.9
Merge pull request #4122 from Sigma1912/2_9_gremlin_initialize_with_current_modal_gcodes
Merge pull request #4168 from grandixximo/backport/machine-coord-params-2.9
Merge pull request #4176 from hdiethelm/ci_doc_build_2.9
check_config: assert INI datatypes before comparing limits
Various CI improvements (little user impact)
Merge pull request #4166 from grandixximo/fix-4165-emccalib-iniref
interp: expose absolute machine position as #5021-#5029
emccalib: ignore ini refs embedded in pin names
Touchy: Backport updates from master
Merge pull request #4164 from grandixximo/backport/3996-tool-offset-params-2.9
tests: update tool offset assertions for #5401-#5409 applied semantics
docs: G38 probe to machine-coordinate conversion via #5401-#5409
interp: make #5401-#5409 the applied tool length offset
halscope improvements
gremlin: Initialize preview interpreter with active modal gcodes
Merge pull request #4022 from wucke13/dev/wucke13/backport-preempt-rt-detection-for-6.12-and-later
Merge pull request #4015 from grandixximo/fix/3994-axis-touchoff-jog-2.9
axis gui improvements
Improvements in Xenomai realtime support
Fix rtapi_app: Sanitize name for module addresses
radiobutton: A new HAL component to select between mutually-exclusive states
halshow: fix broken menu item: Watch -> Add pin/signal/parameter
Fix Gmoccapy screen resizing issue #3899
rtapi: Refuse to load uspace components missing rtapi_app_exit
Merge pull request #3898 from NTULINUX/2.9_libedit
Move python3-poppler-qt5 to “Suggests” addresses Debian bug #1129683
Move python3-poppler-qt5 to “Recommends”. Issue #3872 addresses Debian bug #1129683
Merge pull request #3790 from mark-v-d/2.9 (lathe cycles)
hm2_modbus fixes
fix: emc/canterp: passing right value for SPINDLE_ORIENTATION
Adding testcase for 6bf62870da5866a237bdd8531e28f33644255164 endless loop in g71 fix.
If statement should not be nested. This causes the hal component to ignore the enable state of each axis range.
qtdragon - various updates
gmoccapy - various updates

The full changelog can be found at https://github.com/LinuxCNC/linuxcnc/blob/2.9/debian/changelog

As usual I would like to thank all the LinuxCNC developers and testers, especially the following who contributed directly to this release:

Alec Ari
Bertho Stultiens
BsAtHome
CMorley
david mueller
Hannes Diethelm
Hans Unzner
Jerry Trantow
Luca Toniolo
Mark
mark-v-d
Roy
Sean Froome
Steffen Moeller
tzuohann

The LinuxCNC repositories have been updated for Buster, Bullseye, Bookworm, Trixie and Sid.

Note that released debs are also now available on the LinuxCNC GitHub under “Releases”: www.github.com/https://github.com/LinuxCNC/linuxcnc

Happy Machining!

Free Software fabrication gathering in Norway 2026

Tue, 31 Mar 2026 05:00:00 -0600

You are invited to a small LinuxCNC and free software fabrication workshop/gathering in Norway this summer, over the weekend starting June 26th, 2026. As last year, the gathering maintain a slightly broader scope and welcome people outside the LinuxCNC community. It is organised as an unconference, where participants create the program upon arrival.

The location is a metal workshop 15 minutes’ drive from Gardermoen airport (OSL), with plenty of space and a hotel just 5 minutes away by car. We plan to fire up the barbecue in the evenings. Please let us know if you would like to join. We track the list of participants on a simple pad for food capacity planning. Please add yourself to the pad if you are interested in showing up, and join the Signal group.

Details and signup here: http://www.hungry.com/~pere/blog/The_2026_LinuxCNC_Norwegian_Developer_Gathering.html

LinuxCNC 2.9.8 released

Sat, 03 Jan 2026 08:42:00 -0700

LinuxCNC 2.9.8 has been released.

This is a minor update release, mainly of interest to those using the hal_gpio HAL driver (mainly Pi users)

Changelog:

backport #3516 to fix #3679
Only initialize python if not yet initialized.
hal_gpio: Adapt to use libgpiod3 or libgpiod2 according to what is installed
Merge pull request #3671 from smoe/docs_image_handling
core-components.adoc remove duplicate descriptions
Merge pull request #3642 from LinuxCNC/2.9_#2460
Update LinuxCNC RTAI Install instructions
Merge pull request #3555 from smoe/lintian_warnings
Merge pull request #3588 from f355/2.9
[ci] publish releases with artifacts
debian: Addressed lintian warnings
axis.py: restore mdi queuing provision #2460

The main driver for the release was the change in API for the gpiod driver. This resulted in the hal_gpio driver not being built under Trixie.

As of this release the default Debian version for the ISO for both PC and Pi has been updated to Trixie. The LinuxCNC repositories have been updated for Buster, Bullseye, Bookworm, Trixie and Sid.

Note that released debs are also now available on the LinuxCNC GitHub under “Releases”: www.github.com/https://github.com/LinuxCNC/linuxcnc

As always, thanks to all the developers who make this possible, and for this release especially:

Bertho Stultiens Dewey Garrett Konstantin Tcepliaev Robert Schöftner Steffen Möller

LinuxCNC 2.9.7 released

Sun, 26 Oct 2025 17:11:00 -0600

LinuxCNC 2.9.7 has been released.

This is another bug-fix release to fix an unexpected interaction in a previous bugfix. (In this case the driver for the popular XHC pendants was incompatible with changes made to HALUI pin creation)

In addition changes to the CI (continuous integration) in Github mean that the install debs will be available from the LinuxCNC Github repository under the “releases tab”

This update is for all users, but especially users of the XHC pendants and Gmoccapy.

Packages for 2.9-uspace for amd64 (PC) and arm64 (Pi) for Debian Buster, Bullseye, Bookworm, Trixie and Sid have been added to the linuxcnc repository. If you installed from one of our live images or Pi SD-card images then the update should be available immediately.

If you installed into a normally-installed Debian from the Debian repositories then hopefully the new version can be queued up for the next point release. If you can’t wait then it is possible to add the LinuxCNC repositories to the apt sources. One way to do this and install the security keys is via the shell script here: https://linuxcnc.org/docs/stable/html/getting-started/getting-linuxcnc.html#_installing_on_debian_bookworm_with_preempt_rt_kernel

This script has been updated to include a new, longer key required by Debian versions from Trixie onwards.

At the moment the live-image installer and SD card images will install 2.9.4 but update should be trivial (and possibly automatic)

RTAI is still supported, but in the short term building from source is likely to be the most expedient way to get 2.9.7 on that platform.

Changelog

[ci] publish releases with artifacts - GitHub now builds release debs
Revert 7d9ee66 to address #3583 - halui functions stop working in 2.9.5/6
Merge pull request #3512 from Sigma1912/patch-1
Gmoccapy: Fix arrow key up/down bug in tooleditor

Acknowledgements

As always, we couldn’t do this without the contributions from the community, so many thanks to:

Konstantin Tcepliaev Sigma1912

LinuxCNC Meetup in Stuttgart

Sat, 27 Sep 2025 17:50:00 -0600

There will be a meeting of LinuxCNC developers, users, and enthusiasts in Stuttgart, Germany, during the weekend from Friday October 31th to Sunday November 2th 2025.

This will be a pretty informal meeting, there is no registration, no entrance fee, no badges, no speakers, and no set agenda. It is a chance for people interested in LinuxCNC to meet each other, show off their projects, and talk about issues, fears, hopes, and dreams.

Details and signup here: https://nuudel.digitalcourage.de/dGtDlt4Tzw9tZ3Hn

LinuxCNC 2.9.6 released

Thu, 25 Sep 2025 18:11:00 -0600

LinuxCNC 2.9.6 has been released.

This is a bug-fix release. Shortly after the release of 2.9.5 it was noticed that a fix for a graphics bug in Gmoccapy had resulted in the Axis touch-off dialog box no-longer working for non-zero entries.

This update is for all users, but especially users of the Axis GUI.

Packages for 2.9-uspace for amd64 (PC) for Debian Buster, Bullseye, Bookworm and Trixie and for arm64 (Raspberry Pi 4/5) for Buster and Bookworm have been added to the linuxcnc repository. If you installed from one of our live images or Pi SD-card images then the update should be available immediately.

At the moment the live-image installer and SD card images will install 2.9.4 but update should be trivial (and possibly automatic)

RTAI is still supported, but in the short term building from source is likely to be the most expedient way to get 2.9.6 on that platform.

Changelog

qtvcp -Qt5_graphics: issue 2753; preview wrongly uses INI startup code
Merge pull request #3567 from Sigma1912/2_9-Correct_bad_fix_for_2753
Gremlin: Don’t use RS274NGC_STARTUP_CODE when updating the preview
Docs: Address G52 Circular Link #3565

Acknowledgements

As always, we couldn’t do this without the contributions from the community, so many thanks to:

CMorley Sigma1912

LinuxCNC 2.9.5 released

Sun, 07 Sep 2025 16:59:00 -0600

LinuxCNC 2.9.5 has been released.

This is mainly a bugfix release, but includes a new modbus driver for the Mesa UART (update/replacement for mesa_modbus with more flexibility and configurability)

At the moment the live-image installer and SD card images will install 2.9.4 but update should be trivial (and possibly automatic)

RTAI is still supported, but in the short term building from source is likely to be the most expedient way to get 2.9.5 on that platform.

Highlights:

Backport new hm2_modbus driver to 2.9 branch.
Fix probe contact bounce triggering error during decel phase

Abridged list of other updates.

gmoccapy: change text to icons of undo/redo buttons to fit window size
tests: save.1 test removed. It’s been skipped for 19 years.
halui: on startup, set the first configured axis as ‘is-selected’ instead of X
halui: Don’t create ‘halui.axis.’- pins for unconfigured axes
qtvcp versa probe: remember setting of auto skew/zero buttons we reopened
PyVCP test: result file formatting fixes (#3551)
stepconf -fix human input names in wrong order
Tests: Add a test for PyVCP - Specifically Issue #3538
Deprecate gantry.comp
Fix #3538 - “halparam” tag not working in PyVCP
tests: Add a test for spindle INI speed limits function
Fix a race; add a test to ensure the ‘result’ and ‘stderr’ files are closed before continuing to run ‘checkresult’.
Fix command-line directories acceptance by correct expansion.
Fix a race between setting the signal handlers and marking hal_ready().
Gladevcp: Update the .ui and .glade files in the sample configs to Gtk+3.0
clarify documentation on stat ‘gcodes’ and (spindle)’speed’ attributes
Merge pull request #3460 from Sigma1912/2.9-Fix-preview-update-not-respecting-active-wcs
Don’t use RS274NGC_STARTUP_CODE when updating the preview
Merge pull request #3454 from Sigma1912/2.9_Fix_issue_3447
Gmoccapy: Fix very large numbers for spindle speed and ‘Vc’ in the gui when using G96
Gmoccapy: Fix ‘spindle.0.speed-out’ pins being reset to wrong value when using G96
Split declaration/assignment with label because it is not accepted by the compiler in Debian 10 and 11.
Fix invalid escape sequence warnings from halcompile and hal components.
Fix missing parity error definition
Merge pull request #3412 from BsAtHome/backport_2.9_fix_update-pktuart-v3
Update, fix and reorganize hostmot2 PktUART to support V3.
debian: Updated policy standard to 4.7.2
orient: Commit 79c0966 had an un-noticed effect on the behaviour of M19 reported in issue #3389
ServoToGo: remove old weblinks that now redirect to a spam site
halui -fix spindle override using direct value.
gmoccapy: fix setting to disable “run from line”
halscope: set button left and right padding to 0 to allow smaller window size
docs: update halscope channel off function + update images
qtdragon_hd_vert -add a sample config for vertical layout.
qtvcp -qtdragon_hd_vert: add a vertical layout version
Merge pull request #3339 from NTULINUX/ntulinux/2.9-fixes
interp_o_word.cc: Insert almost-certainly-missing “breaks” addresses #3290
qtvcp -vismach config cleanup: gantry_5axis, millturn, vismach_fanuc_200f

The full changelog can be seen at https://github.com/LinuxCNC/linuxcnc/blob/2.9/debian/changelog

As always, we couldn’t do this without the contributions from the community, so many thanks to:

Alec Ari andronick83 Bertho Stultiens CMorley DauntlessAq David Hans Unzner Petter Reinholdtsen Rene Hopf Sigma1912 Steffen Möller