** No longer affects: gdm3 (Ubuntu) ** No longer affects: gdm3 (Ubuntu Lunar)
** No longer affects: gdm3 (Ubuntu Mantic) ** Description changed: [ 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. - - This issue has been readily reproduced in Ubuntu and reported to upstream mutter. - https://gitlab.gnome.org/GNOME/mutter/-/issues/2909 + screen (bug 2039757). [ Test Plan ] - * Ensure that a kernel with required kernel changes can boot to GDM using DRM driver (amdgpu, i915, or nouveau) + * 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 ] * 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 ** Description changed: [ Impact ] - The fbdev subsystem has been deprecated for a long time. We should drop it in favour of using simpledrm with fbdev emulation layer. + + 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 (bug 2039757). + [ Test Plan ] - [ 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. + * 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 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1965303 Title: Migrate from fbdev drivers to simpledrm and DRM fbdev emulation layer To manage notifications about this bug go to: https://bugs.launchpad.net/gdm/+bug/1965303/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
