Let's see if these resolve at least some of the issues.
For sound and soft blocked bluetooth
Create /etc/kernel/cmdline and add following line to it
acpi_osi='!Windows 2013' acpi_osi='!Windows 2012' modprobe.blacklist=acer_wmi
Easy way to do that is just run sudo nano /etc/kernel/cmdline
in terminal. You can save the file with CTRL+O
and exit via CTRL+X
Then run sudo clr-boot-manager update
in terminal.
For stubborn airplane mode we apparently need to create a systemd service
sudo nano /etc/systemd/system/hp-keycodes.service
Then add the following to the file
[Unit]
Description=HP setkeycodes fix
[Service]
Type=oneshot
Restart=no
RemainAfterExit=no
ExecStart=/usr/bin/setkeycodes e057 240 e058 240
[Install]
WantedBy=rescue.target
WantedBy=multi-user.target
WantedBy=graphical.target
Save and run sudo systemctl enable hp-keycodes.service
. Then reboot a couple times and see if your issue has been solved