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Update Ubuntu.md

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Signed-off-by: Robin Davies <rerdavies@gmail.com>
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Robin Davies
2025-06-07 21:46:38 -04:00
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@@ -23,9 +23,9 @@ By default, Ubuntu installs a PREEMT_DYNAMIC kernel, configured to run with volu
pipedal_kconfig pipedal_kconfig
``` ```
and then select Preempt=full. Switching between PREEMPT_DYNAMIC is a configuration-only change, and does not install new components. The switch actually takes place at runtime. Astonishingly, you do not even need to reboot! and then select Preempt=full. Switching between PREEMPT_DYNAMIC kernels is a configuration-only change, and does not install new components. The switch actually takes place at runtime. Astonishingly, you do not even need to reboot!
Full realtime kernels (RT_PREEMPT) may provide slightly better realtime audio than a PREEMPT_DYNAMIC/preempt=full kernel, but the PREEMPT_DYNAMIC kernel should be perfectly adequate. As a point of reference, current versions of Ubuntu Studio uses a PREEMPT_DYNMAIC/preempt=full kernel, and the maintainers of Ubuntu Studio consciously chose to not install an RT_PREEMPT kernel. If you are having problems with intermittent audio dropouts that occur very infrequently, you may want to try an RT_PREEMPT kernel instead. The pre-built Ubuntu RT_PREEMPT kernel can be installed using `apt` but is only available if you have an Ubuntu Pro subscription. Ubuntu Pro is free for non-commercial use. Full realtime kernels (RT_PREEMPT) may provide slightly better realtime audio than a PREEMPT_DYNAMIC/preempt=full kernel, but the PREEMPT_DYNAMIC kernel should be perfectly adequate. As a point of reference, current versions of Ubuntu Studio uses a PREEMPT_DYNMAIC/preempt=full kernel, and the maintainers of Ubuntu Studio consciously chose to not install an RT_PREEMPT kernel by default. If you are having problems with intermittent audio dropouts that occur very infrequently, you may want to try an RT_PREEMPT kernel instead. A pre-built Ubuntu RT_PREEMPT kernel can be installed using `apt` but is only available if you have an Ubuntu Pro subscription. Ubuntu Pro is free for non-commercial use.
## Support for WIFI Auto-Hotspots on Ubuntu Server ## Support for WIFI Auto-Hotspots on Ubuntu Server
@@ -37,8 +37,7 @@ Ubuntu Server 24.x (and probably other server-specific installs on other Debian
It's easy enough to reconfigure Ubuntu Server to run the Network Manager network stack instead. However you should be It's easy enough to reconfigure Ubuntu Server to run the Network Manager network stack instead. However you should be
aware that Netplan TCP/IP configuration settings will not be migrated to Network Manager. If you perform this step on a server on which changes have beeen made to Netplan configuration files, you will lose those configuration changes, and will need to reimplement them in Network Manager. If you are aware that Netplan TCP/IP configuration settings will not be migrated to Network Manager. If you perform this step on a server on which changes have beeen made to Netplan configuration files, you will lose those configuration changes, and will need to reimplement them in Network Manager. If you are
a Netplan configuration (or are working with a clean install), then the default Network Manager configuration will work perfectly well too. On a clean install, or for ordinary using a default Netplan configuration (or are working with a clean install), then the default Network Manager configuration should work without problems. On a clean install, or for ordinary home use, switching network stacks is pretty low risk.
home use, switching network stacks is pretty low risk.
To reconfigure Ubuntu Server to use the Network Manager network stack (and therefore enable PiPedal's Auto-Hotspot feature), run the following command: To reconfigure Ubuntu Server to use the Network Manager network stack (and therefore enable PiPedal's Auto-Hotspot feature), run the following command: