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[Paride Legovini <2009436@xxxxxxxxxxxxxxxxxx>]

I didn't dig into the specifics, but the error the we see in the passed
test log comes from this this line from /usr/lib/dkms/dkms-autopkgtest:

# Try and remove dkms to spot packages which miss a dkms dependency
echo "I: Checking for missing dkms dependency by trying to deinstall dkms"
dpkg --remove dkms || true

So failures to execute that command are explicitly ignored (|| true). I
don't see an issue with autopkgtest (package or infra) here.

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https://bugs.launchpad.net/bugs/2009436

Title:
  dkms modules are not built anymore for linux-kvm

Status in autopkgtest package in Ubuntu:
  Incomplete

Bug description:
  Since 23th of Feb, some adt test for dkms packages (digimend-dkms is an example) started to pass even though it should fail.
  Before, the test would fail during build, because CONFIG_USB=n.

  Logs from last time it failed:
  https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/amd64/d/digimend-dkms/20230213_171044_032fa@/log.gz

  Logs where test passes.
  https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/amd64/d/digimend-dkms/20230301_110606_17e6d@/log.gz

  Could not reproduce it locally, in a vm, a simple sudo apt install digimend-dkms will fail during build.
  ```
  I: Testing binary package digimend-dkms
  I: Trying to build digimend/10 for 5.15.0-1028-kvm
  Creating symlink /var/lib/dkms/digimend/10/source -> /usr/src/digimend-10

  Kernel preparation unnecessary for this kernel. Skipping...

  Building module:
  cleaning build area...
  make -j1 KERNELRELEASE=5.15.0-1028-kvm KVERSION=5.15.0-1028-kvm...(bad exit status: 2)
  Error! Bad return status for module build on kernel: 5.15.0-1028-kvm (x86_64)
  Consult /var/lib/dkms/digimend/10/build/make.log for more information.
  E: digimend/10 failed to build for 5.15.0-1028-kvm
  ========== /var/lib/dkms/digimend/10/build/make.log ==========
  DKMS make.log for digimend-10 for kernel 5.15.0-1028-kvm (x86_64)
  Sat Jan 28 00:05:19 UTC 2023
  make -C /lib/modules/5.15.0-1028-kvm/build M=/var/lib/dkms/digimend/10/build modules
  make[1]: Entering directory '/usr/src/linux-headers-5.15.0-1028-kvm'
    CC [M]  /var/lib/dkms/digimend/10/build/hid-kye.o
    CC [M]  /var/lib/dkms/digimend/10/build/hid-uclogic-core.o
    CC [M]  /var/lib/dkms/digimend/10/build/hid-uclogic-rdesc.o
    CC [M]  /var/lib/dkms/digimend/10/build/hid-uclogic-params.o
  /var/lib/dkms/digimend/10/build/hid-uclogic-params.c: In function ‘uclogic_params_init’:
  /var/lib/dkms/digimend/10/build/hid-uclogic-params.c:1147:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
   1147 |                 if (bNumInterfaces != 3) {
        |                    ^
  /var/lib/dkms/digimend/10/build/hid-uclogic-params.c:1165:9: note: here
   1165 |         case VID_PID(USB_VENDOR_ID_HUION,
        |         ^~~~
    LD [M]  /var/lib/dkms/digimend/10/build/hid-uclogic.o
    CC [M]  /var/lib/dkms/digimend/10/build/hid-polostar.o
    CC [M]  /var/lib/dkms/digimend/10/build/hid-viewsonic.o
    MODPOST /var/lib/dkms/digimend/10/build/Module.symvers
  ERROR: modpost: "usb_string" [/var/lib/dkms/digimend/10/build/hid-uclogic.ko] undefined!
  ERROR: modpost: "usb_control_msg" [/var/lib/dkms/digimend/10/build/hid-uclogic.ko] undefined!
  ERROR: modpost: "usb_hid_driver" [/var/lib/dkms/digimend/10/build/hid-uclogic.ko] undefined!
  make[2]: *** [scripts/Makefile.modpost:133: /var/lib/dkms/digimend/10/build/Module.symvers] Error 1
  make[2]: *** Deleting file '/var/lib/dkms/digimend/10/build/Module.symvers'
  make[1]: *** [Makefile:1819: modules] Error 2
  make[1]: Leaving directory '/usr/src/linux-headers-5.15.0-1028-kvm'
  make: *** [Makefile:25: modules] Error 2
  ====================
  ./digimend/10/build/make.log
  autopkgtest [00:05:23]: test dkms-autopkgtest: -----------------------]
  dkms-autopkgtest     FAIL non-zero exit status 1
  autopkgtest [00:05:24]: test dkms-autopkgtest:  - - - - - - - - - - results - - - - - - - - - -
  autopkgtest [00:05:24]: @@@@@@@@@@@@@@@@@@@@ summary
  dkms-autopkgtest     FAIL non-zero exit status 1
  ```

  Test fails with exitcode 1, and autopkgtest return 4 as exitcode.

  This happens in multiple modules (oss4, rtl8812au), they are supposed to fail because a config is not enabled, but now they pass (superficially). This may affect other derivatives as well that have some config options disabled.
  To be investigated.

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