On Mon, 03 Nov 2025 20:49:18 +0000, Tim wrote:
> The PC will not shutdown via the shutdown button of via the CLI
> interface by issuing the sudo shutdown -h now.
> I have found that using
>
> sudo shutdown -Ph now
>
> from the CLI will shut the PC down.
I've always been under the impression that you need to specify -P if
you want the system to power off after shutting down, though the exact
behaviour could depend on the system firmware. In which case, the
behaviour you describe when running `shutdown -h now` is expected. But
this doesn't seem to explain why the shutdown button doesn't work.
> The burping noise happens every time you play a sound or video, but
> once it has burped at the start of the file the playback is
> perfectly OK.
This is reminiscent of an issue I once had with my laptop, which would
make a pop sound whenever audio output was initiated. My workaround
was to disable the auto power-save function of the snd_hda_intel
kernel module.
The the relevant parameter values can be read/written in the files:
/sys/module/snd_hda_intel/parameters/power_save
/sys/module/snd_hda_intel/parameters/power_save_controller
The meaning of these parameters is described by the output of
sudo modinfo snd_hda_intel
For some reason my notes on the matter do not cover how I made the
configuration persistent, but it looks like the usual way is to write
a *.conf file in /etc/modprobe.d/ containing, for instance, the line:
option snd_hda_intel power_save=0
See also the modprobe.d(5) man page.
Patrick
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