Like the last line suggested, that's harmless if your linux box has no
secureboot enabled currently. If so, you need to enroll your own key in
BIOS, and use it to sign your own build of kernel modules. See
https://wiki.ubuntu.com/UEFI/SecureBoot/DKMS.
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1902083
Title:
v4l2loopback
Status in linux package in Ubuntu:
Invalid
Bug description:
make && sudo make install
Building v4l2-loopback driver...
make -C /lib/modules/`uname -r`/build
M=/home/rama/Downloads/VirtualWebcam/v4l2loopback modules
make[1]: Entering directory '/usr/src/linux-headers-5.8.0-25-generic'
make[1]: Leaving directory '/usr/src/linux-headers-5.8.0-25-generic'
make -C /lib/modules/`uname -r`/build
M=/home/rama/Downloads/VirtualWebcam/v4l2loopback modules_install
make[1]: Entering directory '/usr/src/linux-headers-5.8.0-25-generic'
INSTALL /home/rama/Downloads/VirtualWebcam/v4l2loopback/v4l2loopback.ko
At main.c:160:
- SSL error:02001002:system library:fopen:No such file or directory:
../crypto/bio/bss_file.c:69
- SSL error:2006D080:BIO routines:BIO_new_file:no such file:
../crypto/bio/bss_file.c:76
sign-file: certs/signing_key.pem: No such file or directory
DEPMOD 5.8.0-25-generic
Warning: modules_install: missing 'System.map' file. Skipping depmod.
make[1]: Leaving directory '/usr/src/linux-headers-5.8.0-25-generic'
SUCCESS (if you got 'SSL errors' above, you can safely ignore them)
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