Public bug reported:

It looks like bbswitch is using acpi_bus_get_device() on any
architectures, but this function is not available on armhf or ppc64el:

  CC [M]  /var/lib/dkms/bbswitch/0.8/build/bbswitch.o
/var/lib/dkms/bbswitch/0.8/build/bbswitch.c: In function ‘bbswitch_off’:
/var/lib/dkms/bbswitch/0.8/build/bbswitch.c:271:13: error: implicit declaration 
of function ‘acpi_bus_get_device’; did you mean ‘acpi_get_gpe_device’? 
[-Werror=implicit-function-declaration]
  271 |         r = acpi_bus_get_device(dis_handle, &ad);
      |             ^~~~~~~~~~~~~~~~~~~
      |             acpi_get_gpe_device
/var/lib/dkms/bbswitch/0.8/build/bbswitch.c:276:15: error: invalid use of 
undefined type ‘struct acpi_device’
  276 |         if (ad->power.state == ACPI_STATE_UNKNOWN) {
      |               ^~
/var/lib/dkms/bbswitch/0.8/build/bbswitch.c:278:15: error: invalid use of 
undefined type ‘struct acpi_device’
  278 |             ad->power.state = ACPI_STATE_D0;
      |               ^~

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu Jammy)
     Importance: Undecided
         Status: New

** Also affects: linux (Ubuntu Jammy)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1951583

Title:
  bbswitch dkms build failure with 5.15 on armhf and ppc64el

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