PKCS#7 signature not signed with a trusted key

[SunBear]

After making nvidia drivers available in Ubuntu 18.04 via Ubuntu's StableReleaseUpdates (SRU), I expected that all the usual error and warning messages reported by `dmesg -l err` and `dmes -l warn` before the nvidia drivers's transition to SRU should no longer appear. However, I still find them. See below.

$ dmesg -l err
[ 2.322549] PKCS#7 signature not signed with a trusted key
[ 2.438684] PKCS#7 signature not signed with a trusted key
[ 2.439332] PKCS#7 signature not signed with a trusted key
[ 2.439727] PKCS#7 signature not signed with a trusted key
[ 2.445846] PKCS#7 signature not signed with a trusted key
$ dmesg -l warn
[ 2.322558] nvidia: loading out-of-tree module taints kernel.
[ 2.322565] nvidia: module license 'NVIDIA' taints kernel.
[ 2.322566] Disabling lock debugging due to kernel taint
[ 2.433159] NVRM: loading NVIDIA UNIX x86_64 Kernel Module 430.26 Tue Jun 4 17:40:52 CDT 2019

Expected outcome: The above error and warning msgs should no longer show in dmesg.

$ uname -a
Linux Machine 5.0.0-25-generic #26~18.04.1-Ubuntu SMP Thu Aug 1 13:51:02 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

$ dpkg -l | grep nvidia
ii libnvidia-cfg1-430:amd64 430.26-0ubuntu0.18.04.2 amd64 NVIDIA binary OpenGL/GLX configuration library
ii libnvidia-common-430 430.40-0ubuntu0~gpu18.04.1 all Shared files used by the NVIDIA libraries
ii libnvidia-compute-430:amd64 430.26-0ubuntu0.18.04.2 amd64 NVIDIA libcompute package
ii libnvidia-compute-430:i386 430.26-0ubuntu0.18.04.2 i386 NVIDIA libcompute package
ii libnvidia-decode-430:amd64 430.26-0ubuntu0.18.04.2 amd64 NVIDIA Video Decoding runtime libraries
ii libnvidia-decode-430:i386 430.26-0ubuntu0.18.04.2 i386 NVIDIA Video Decoding runtime libraries
ii libnvidia-encode-430:amd64 430.26-0ubuntu0.18.04.2 amd64 NVENC Video Encoding runtime library
ii libnvidia-encode-430:i386 430.26-0ubuntu0.18.04.2 i386 NVENC Video Encoding runtime library
ii libnvidia-fbc1-430:amd64 430.26-0ubuntu0.18.04.2 amd64 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-fbc1-430:i386 430.26-0ubuntu0.18.04.2 i386 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-gl-430:amd64 430.26-0ubuntu0.18.04.2 amd64 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-gl-430:i386 430.26-0ubuntu0.18.04.2 i386 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-ifr1-430:amd64 430.26-0ubuntu0.18.04.2 amd64 NVIDIA OpenGL-based Inband Frame Readback runtime library
ii libnvidia-ifr1-430:i386 430.26-0ubuntu0.18.04.2 i386 NVIDIA OpenGL-based Inband Frame Readback runtime library
ii nvidia-compute-utils-430 430.26-0ubuntu0.18.04.2 amd64 NVIDIA compute utilities
ii nvidia-dkms-430 430.26-0ubuntu0.18.04.2 amd64 NVIDIA DKMS package
ii nvidia-driver-430 430.26-0ubuntu0.18.04.2 amd64 NVIDIA driver metapackage
ii nvidia-kernel-common-430 430.26-0ubuntu0.18.04.2 amd64 Shared files used with the kernel module
ii nvidia-kernel-source-430 430.26-0ubuntu0.18.04.2 amd64 NVIDIA kernel source package
ii nvidia-prime 0.8.8.2 all Tools to enable NVIDIA's Prime
ii nvidia-settings 390.77-0ubuntu0.18.04.1 amd64 Tool for configuring the NVIDIA graphics driver
ii nvidia-utils-430 430.26-0ubuntu0.18.04.2 amd64 NVIDIA driver support binaries
ii xserver-xorg-video-nvidia-430 430.26-0ubuntu0.18.04.2 amd64 NVIDIA binary Xorg driver

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[rbmorse (rbmorse)]

Also see this with Nvidia 435.21 from repository

[Karol Szczerba (baszczer)]

Shows up during system startup. I have admgpu-pro drivers installed
$ dmesg -l err
[ 5.888349] PKCS#7 signature not signed with a trusted key
[ 6.055765] PKCS#7 signature not signed with a trusted key
[ 6.056484] PKCS#7 signature not signed with a trusted key
[ 6.131910] PKCS#7 signature not signed with a trusted key
[ 6.132236] PKCS#7 signature not signed with a trusted key
[ 6.133669] PKCS#7 signature not signed with a trusted key
[ 6.133669] PKCS#7 signature not signed with a trusted key
[ 6.164078] PKCS#7 signature not signed with a trusted key
[ 6.167132] PKCS#7 signature not signed with a trusted key

[Pavel Dolinin (pavel-dolinin)]

Same on my Dell XPS 15 with NVIDIA GeForce GTX 960M