If MAXLINEARVELOCITY is missing and LinuxCNC is launched with the configuration picker LinuxCNC just silently does not start and no error is reported If you run it from the terminal you can see the error.
[LinuxCNC/linuxcnc Issue#230] MAX_LINEAR_VELOCITY missing does not show an error
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![[gnea/grbl-Mega Issue#1] $ command extentions](https://www.grblhal.com/wp-content/themes/gitphp/timthumb.php?src=https://www.grblhal.com/wp-content/themes/gitphp/assets/img/pic/5.jpg&h=110&w=185&q=90&zc=1&ct=1)
[gnea/grbl-Mega Issue#1] $ command extentions -
![[gnea/grbl-Mega Issue#2] Better interrupt priorities](https://www.grblhal.com/wp-content/themes/gitphp/timthumb.php?src=https://www.grblhal.com/wp-content/themes/gitphp/assets/img/pic/8.jpg&h=110&w=185&q=90&zc=1&ct=1)
[gnea/grbl-Mega Issue#2] Better interrupt priorities -
![[gnea/grbl-Mega Issue#3] ATMega16U2 virtual com port on ATMega2560](https://www.grblhal.com/wp-content/themes/gitphp/timthumb.php?src=https://www.grblhal.com/wp-content/themes/gitphp/assets/img/pic/7.jpg&h=110&w=185&q=90&zc=1&ct=1)
[gnea/grbl-Mega Issue#3] ATMega16U2 virtual com port on ATMega2560 -
![[gnea/grbl-Mega Issue#4] Real-time adjustable feedrates](https://www.grblhal.com/wp-content/themes/gitphp/timthumb.php?src=https://www.grblhal.com/wp-content/themes/gitphp/assets/img/pic/3.jpg&h=110&w=185&q=90&zc=1&ct=1)
[gnea/grbl-Mega Issue#4] Real-time adjustable feedrates
- [gnea/grbl-Mega Issue#1] $ command extentions
- [gnea/grbl-Mega Issue#2] Better interrupt priorities
- [gnea/grbl-Mega Issue#3] ATMega16U2 virtual com port on ATMega2560
- [gnea/grbl-Mega Issue#4] Real-time adjustable feedrates
- [gnea/grbl-Mega Issue#5] question about the download zip contents
- [gnea/grbl-Mega Issue#6] Adding outputs for external state signals
- [gnea/grbl-Mega Issue#7] which g-code sender is being used in grbl-Mega testing?
- [gnea/grbl-Mega Issue#8] Frecuencia y velocidad de avance.