I'm adding a task for gdm to this bug. The reason is that if simpledrm is used, we've found race conditions that occur where the transition from simpledrm to the proper KMS driver may race with gdm starting up the login screen.
When gdm loses the race you end up with a black screen. So please make sure that any kernels that do adopt simpledrm the matching GDM for OS releases that run this kernel (think about HWE!) will need to pick up this GDM fix as well. https://gitlab.gnome.org/GNOME/gdm/-/commit/04e119c8332a564cfad05dfb9cb6ec547d5ba954 ** Also affects: gdm (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1965303 Title: Migrate from fbdev drivers to simpledrm and DRM fbdev emulation layer Status in gdm package in Ubuntu: New Status in linux package in Ubuntu: Confirmed Status in nvidia-graphics-drivers-470 package in Ubuntu: New Bug description: 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 config changes: DRM=y DRM_FBDEV_EMULATION=y FB_EFI=n FB_VESA=n (? check this) SYSFB_SIMPLEFB=y fbcon will still require FB to be available, but will use the fbdev emulation layer At the time of filing this bug report, the NVIDIA drivers don't support the fbdev emulation layer, so VT's would be broken on them if this was to be enabled right now. So the drivers need fixing, and this bug report is a placeholder until we are able to move forward. fedora bug: https://bugzilla.redhat.com/show_bug.cgi?id=2022385 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/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
