oss4-dkms FTBS in Noble with the linux-6.17 kernel

[John Cabaj]

[ Impact ]

DKMS make.log for oss4-4.2-build2020 for kernel 6.17.0-7-generic (x86_64)
Fri Dec 19 03:04:27 UTC 2025
make: Entering directory '/usr/src/linux-headers-6.17.0-7-generic'
make[1]: Entering directory '/var/lib/dkms/oss4/4.2-build2020/build/core'
warning: the compiler differs from the one used to build the kernel
  The kernel was built by: x86_64-linux-gnu-gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
  You are using: gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
  CC [M] oss_core.o
  CC [M] os_linux.o
  CC [M] oss_ac97.o
  CC [M] oss_audio_core.o
os_linux.c:16:10: fatal error: oss_config.h: No such file or directory
   16 | #include <oss_config.h>
      | ^~~~~~~~~~~~~~
compilation terminated.
make[3]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:287: os_linux.o] Error 1
make[3]: *** Waiting for unfinished jobs....
oss_audio_core.c:26:10: fatal error: oss_config.h: No such file or directory
   26 | #include <oss_config.h>
      | ^~~~~~~~~~~~~~
compilation terminated.
In file included from oss_ac97.c:19:
oss_config.h:37:10: fatal error: ossddk/oss_exports.h: No such file or directory
   37 | #include <ossddk/oss_exports.h>
      | ^~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[3]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:287: oss_audio_core.o] Error 1
make[3]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:287: oss_ac97.o] Error 1
oss_core.c:21:10: fatal error: ossddk/oss_exports.h: No such file or directory
   21 | #include <ossddk/oss_exports.h>
      | ^~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[3]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:287: oss_core.o] Error 1
make[2]: *** [/usr/src/linux-headers-6.17.0-7-generic/Makefile:2016: .] Error 2
make[1]: *** [/usr/src/linux-headers-6.17.0-7-generic/Makefile:248: __sub-make] Error 2
make[1]: Leaving directory '/var/lib/dkms/oss4/4.2-build2020/build/core'
make: *** [Makefile:248: __sub-make] Error 2
make: Leaving directory '/usr/src/linux-headers-6.17.0-7-generic'

[ Test case ]

Install the latest linux-6.17 kernel on Noble:

$ sudo add-apt-repository ppa:canonical-kernel-team/ppa3
$ sudo apt install linux-generic-hwe-24.04-edge

Install oss4-dkms:

$ sudo apt install oss4-dkms

Module built and installed successfully

The same procedure must be repeated on linux-6.8 and linux-6.14 to test for possible regressions.

[ Fix ]

Patch to fix Kbuild and deprecated del_timer() call:

-debian/patches/Kbuild-Use-ccflags-y-instead-of-EXTRA_CFLAGS.patch
-debian/patches/Fix-timer-changes-in-Linux-6.15.patch
-create-ma-tree.sh, changing EXTRA_CFLAGS to ccflags-y

[ Regression potential ]

We may experience regressions in systems that are using the oss4 drivers, especially with kernels >= 6.8 kernel.

[John Cabaj (john-cabaj)]

4.2-build2020-1ubuntu3 -> 4.2-build2020-1ubuntu3.1 debdiff

[Massimiliano Pellizzer (mpellizzer)]

Uploaded thanks

[Nick Rosbrook (enr0n)]

Note that at the moment, this creates a sorting problem with plucky:

oss4 | 4.2-build2020-1ubuntu3 | noble/universe | source
oss4 | 4.2-build2020-1ubuntu3 | plucky/universe | source
oss4 | 4.2-build2020-1ubuntu3.1 | noble/unapproved/f15c988 | source
oss4 | 4.2-build2020-6 | questing/universe | source
oss4 | 4.2-build2020-6 | resolute/universe | source

However, since plucky is EOL on Jan 15, this is not really a problem in practice. Just in case, I will add block-proposed-noble until that time.

[Nick Rosbrook (enr0n)]

Hello John, or anyone else affected,

Accepted oss4 into noble-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/oss4/4.2-build2020-1ubuntu3.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-noble to verification-done-noble. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-noble. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[John Cabaj (john-cabaj)]

Modules built and installed successfully. Modules loaded successfully:

Noble 6.8 kernel:

root@noble-lts-vm:~# uname -r
6.8.0-90-generic
root@noble-lts-vm:~# modprobe osscore
root@noble-lts-vm:~#

Noble 6.14 kernel:

root@noble-614-vm:~# uname -r
6.14.0-37-generic
root@noble-614-vm:~# modprobe osscore
root@noble-614-vm:~#

Noble 6.17 kernel:

root@noble-hwe-vm:~# uname -r
6.17.0-7-generic
root@noble-hwe-vm:~# modprobe osscore
root@noble-hwe-vm:~#