Hello,
On an Apple iMac14,2,
I can’t boot anymore after Fedora 38 updated to kernel v6.3.4. There is a freezed dark screen after the Fedora logo loader.
I can boot with previous kernel version (6.2.15).
When I boot in rescue mode, it says :
Press Enter to continue.
Reloading system manager configuration
Starting default.target
[FAILED] Failed to mount boot-efi.mount - /boot/efi.
[DEPEND] Dependency failed for local-fs.target - Local File System.
[DEPEND] Dependency failed for selinux -autorelabel-marke.service - Mark the need to relabel after reboot.
[FAILED] Failed to mount proc-sys-fs-binfmt_misc.mount - Arbitrary Executable File Formats File System.
[FAILED] Failed to start systemd-binfmt.service - Set Up Additional Binary Formats.
While the previous command line that had worked for several kernels (all the way back to the early 5.X kernels) failed and caused the hang noted. That line was:
Note that the removal of the kvm_ignore_msrs=1 was what fixed booting for me.
The system failed to complete the boot and hung as noted with the underscore on screen before that option was removed.
In the troubleshooting process I had also removed the initcall_blacklist option and that allowed the boot but only displayed a grey screen and never got to the login screen. My final functional command line is as noted above. (Tested by editing the command line from the grub menu, made permanent by editing /etc/default/grub then running grub2-mkconfig -o /boot/grub2/grub.cfg)
If the default driver works for you and fulfills your needs, I indeed suggest to use the default instead of the proprietary nvidia driver → more stability/security given the holistic development and testing in and around the kernel.
However, in case that you will install nvidia drivers again in future: I see that you installed the drivers manually, which means they do not get updates at all. This can cause itself issues over time (stability and security, but also compatibility). You should not do that but instead use a repository with the nvidia driver → usually people use rpmfusion for that (which you seem to already have).
However, I see you have rpmfusion-testing repositories enabled. Be aware that these are, as the name suggests, testing and not yet stable So if you use your system for “production” purposes, I suggest to use the stable repositories.
I suspect the mixture of repos as well as versions was the issue with the nvidia drivers. I think that if one were to disable the nvidia-nonfree-testing repo then reinstall the nvidia 470xx driver from the rpmfusion-nonfree-nvidia-drivers repo things would work properly
I have an iMac 14,2 and normally use nouveau and Wayland. I tried akmod-nvidia-470xx from rpmfusion-nonfree when I first installed F38, but went back to nouveau.\ with Wayland.
Today, with 6.3.5-200, I tried akmod-nvidia-470xx again. First boot went to a nearly black screen with grey across the top 1/3.
Interesting entries in journalctl:
Jun 06 14:16:39 fedorausb kernel: nvidia: module license 'NVIDIA' taints kernel.
Jun 06 14:16:39 fedorausb kernel: Disabling lock debugging due to kernel taint
Jun 06 14:16:42 fedorausb /usr/libexec/gdm-x-session[1258]: (II) NOUVEAU driver for NVIDIA chipset families :
Jun 06 14:16:42 fedorausb kernel: NVRM: loading NVIDIA UNIX x86_64 Kernel Module 470.182.03 Fri Feb 24 03:29:56 UTC 2023
Jun 06 14:16:43 fedorausb /usr/libexec/gdm-x-session[1258]: (II) modeset(0): Refusing to try glamor on llvmpipe
Jun 06 14:16:43 fedorausb /usr/libexec/gdm-x-session[1258]: (EE) modeset(0): glamor initialization failed
Jun 06 14:16:43 fedorausb kernel: nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 470.182.03 Fri Feb 24 03:18:06 UTC 2023
Jun 06 14:16:43 fedorausb kernel: [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
Then I tried adding initcall_blacklist=simpledrm_platform_driver_initto the kernel command line. The system boots and is running Xorg (Wayland is not on offer).
Exactly the problem I experienced with akmod-nvidia-470xx.
The only reason I used this driver was because it worked better with my second screen (apple thunderbolt display). With the nouveau drivers, the second screen is off after a reboot. I have to go to the gnome settings to toggle it back on.
Anyway, now he akmod drivers are buggy with 6.3 kernels, I’ll stay on the nouveau drivers.
So if you use your system for “production” purposes, I suggest to use the stable repositories.