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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
```
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
@@ -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
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
home use, switching network stacks is pretty low risk.
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.
To reconfigure Ubuntu Server to use the Network Manager network stack (and therefore enable PiPedal's Auto-Hotspot feature), run the following command: