Public bug reported:
Hello,
I am running Ubuntu 25.04 and trying to install the latest daily
mainline kernel
(6.15.0-061500rc5daily20250509-generic_6.15.0-061500rc5daily20250509.202505090206_amd64).
When trying to install linux-image-
unsigned-6.15.0-061500rc5daily20250509-generic_6.15.0-061500rc5daily20250509.202505090206_amd64.deb
and linux-
headers-6.15.0-061500rc5daily20250509-generic_6.15.0-061500rc5daily20250509.202505090206_amd64.deb
I get the following error:
linux-image:
Building module:
Cleaning build area...
make -j24 KERNELRELEASE=6.15.0-061500rc5daily20250509-generic -C
/lib/modules/6.15.0-061500rc5daily20250509-generic/build
M=/var/lib/dkms/evdi/1.14.8+dfsg/build DKMS_BUILD=1...(bad exit status: 2)
ERROR (dkms apport): kernel package
linux-headers-6.15.0-061500rc5daily20250509-generic is not supported
Error! Bad return status for module build on kernel:
6.15.0-061500rc5daily20250509-generic (x86_64)
Consult /var/lib/dkms/evdi/1.14.8+dfsg/build/make.log for more information.
Sign command: /usr/bin/kmodsign
Signing key: /var/lib/shim-signed/mok/MOK.priv
linux-headers:
Building module:
Cleaning build area...
make -j24 KERNELRELEASE=6.15.0-061500rc5daily20250509-generic -C
/lib/modules/6.15.0-061500rc5daily20250509-generic/build
M=/var/lib/dkms/evdi/1.14.8+dfsg/build DKMS_BUILD=1...(bad exit status: 2)
ERROR (dkms apport): kernel package
linux-headers-6.15.0-061500rc5daily20250509-generic is not supported
Error! Bad return status for module build on kernel:
6.15.0-061500rc5daily20250509-generic (x86_64)
Consult /var/lib/dkms/evdi/1.14.8+dfsg/build/make.log for more information.
Sign command: /usr/bin/kmodsign
Signing key: /var/lib/shim-signed/mok/MOK.priv
Public certificate (MOK): /var/lib/shim-signed/mok/MOK.der
Looking in the make.log file I see this message:
DKMS make.log for evdi-1.14.8+dfsg for kernel
6.15.0-061500rc5daily20250509-generic (x86_64)
Fri May 9 02:18:57 PM EDT 2025
make: Entering directory
'/usr/src/linux-headers-6.15.0-061500rc5daily20250509-generic'
make[1]: Entering directory '/var/lib/dkms/evdi/1.14.8+dfsg/build'
warning: the compiler differs from the one used to build the kernel
The kernel was built by: x86_64-linux-gnu-gcc-14 (Ubuntu 14.2.0-19ubuntu2)
14.2.0
You are using: gcc-14 (Ubuntu 14.2.0-19ubuntu2) 14.2.0
As I'm understanding it, the module build is failing because the
compiler used to make the kernel differs from that currently in use by
my computer, but they appear to be the same compiler version--just with
different names. Are they in fact the same compiler version? If so, how
can I get the module to build successfully?
I have attached the make.log file, but could not post the recommended
output of cat /proc/version_signature > version.log or sudo lspci -vnvn
> lspci-vnvn.log because I get the errors (respectively).
cat: /proc/version_signature: No such file or directory
pcilib: Error reading /sys/bus/pci/devices/0000:00:08.3/label: Operation
not permitted
Thanks!
Kevin
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "make.log"
https://bugs.launchpad.net/bugs/2110334/+attachment/5876708/+files/make.log
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https://bugs.launchpad.net/bugs/2110334
Title:
False detection of mismatched compilers prevents evdi-dkms module
build success during kernel installation
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