** Description changed: - The fbdev subsystem has been deprecated for a long time. We should drop - it in favour of using simpledrm with fbdev emulation layer. + [ 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 config changes: + 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 - fedora bug: - https://bugzilla.redhat.com/show_bug.cgi?id=2022385 + 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. + + [ Test Plan ] + * Ensure that a kernel with required kernel changes can boot to GDM using DRM driver (amdgpu, i915, or nouveau) + + [ Where Problems could occur ] + * 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
** Bug watch added: gitlab.gnome.org/GNOME/mutter/-/issues #2909 https://gitlab.gnome.org/GNOME/mutter/-/issues/2909 ** Also affects: gdm via https://gitlab.gnome.org/GNOME/mutter/-/issues/2909 Importance: Unknown Status: Unknown ** Bug watch added: Red Hat Bugzilla #2022385 https://bugzilla.redhat.com/show_bug.cgi?id=2022385 ** Also affects: linux (Fedora) via https://bugzilla.redhat.com/show_bug.cgi?id=2022385 Importance: Unknown Status: Unknown -- 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: Unknown Status in gdm3 package in Ubuntu: Fix Released Status in linux package in Ubuntu: Confirmed Status in nvidia-graphics-drivers-470 package in Ubuntu: Fix Released Status in gdm3 source package in Jammy: Triaged Status in linux source package in Jammy: Won't Fix Status in nvidia-graphics-drivers-470 source package in Jammy: Fix Released Status in gdm3 source package in Mantic: Fix Released Status in linux source package in Mantic: Confirmed Status in nvidia-graphics-drivers-470 source package in Mantic: Fix Released Status in linux package in Fedora: Unknown 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 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. [ Test Plan ] * Ensure that a kernel with required kernel changes can boot to GDM using DRM driver (amdgpu, i915, or nouveau) [ Where Problems could occur ] * 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
