Turns out we didn't even need to modify the kernel for this. By choosing simplefb and the 'tiny' DRM drivers for initrd, we get simpledrm.ko as it existed in our older kernels...
https://code.launchpad.net/~vanvugt/ubuntu/+source/initramfs- tools/+git/initramfs-tools/+merge/462482 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to nvidia-graphics-drivers-470 in Ubuntu. https://bugs.launchpad.net/bugs/1965303 Title: Migrate from fbdev drivers to simpledrm and DRM fbdev emulation layer Status in gdm: Fix Released Status in linux package in Ubuntu: Fix Released Status in nvidia-graphics-drivers-470 package in Ubuntu: Fix Released Status in linux source package in Jammy: Won't Fix Status in nvidia-graphics-drivers-470 source package in Jammy: Fix Released Status in linux source package in Lunar: Won't Fix Status in nvidia-graphics-drivers-470 source package in Lunar: Fix Released Status in linux source package in Mantic: Won't Fix Status in nvidia-graphics-drivers-470 source package in Mantic: Fix Released Status in linux source package in Noble: Fix Released Status in nvidia-graphics-drivers-470 source package in Noble: Fix Released Status in linux package in Fedora: Fix Released Bug description: [ Impact ] The fbdev subsystem has been deprecated for a long time. We should drop it in favour of using simpledrm with fbdev emulation layer. This requires Kernel config changes: FB_EFI=n FB_VESA=n fbcon will still require FB to be available, but will use the fbdev emulation layer [ Test Plan ] * Ensure that systems currently relying on fbdev (and therefore only allowing Xorg logins) such as some virtual machine types, boot with working Wayland support. [ Where Problems could occur ] * When this stack is enabled, it changes boot timing such that some drivers may take a longer time to boot and GDM may hang in a black screen (bug 2039757). * Race conditions could be exposed to DE environments * Software that expects to find DRM device at /dev/dri/card0 may have a problem. * Some older versions of NVIDIA driver might not work properly. [ Other Info ] * Fedora bug: https://bugzilla.redhat.com/show_bug.cgi?id=2022385 To manage notifications about this bug go to: https://bugs.launchpad.net/gdm/+bug/1965303/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
