XPost: linux.debian.bugs.dist   
   From: jarl.gullberg@visar-systems.com   
      
   Source: linux   
   Severity: wishlist   
      
   Dear Maintainer,   
      
   Currently, Debian does not enable CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER   
   by default. I'd like to request that this config options be enabled for   
   UEFI-enabled architectures in order to better support flicker-free boot.   
      
   CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER defers the clearing of the   
   framebuffer console until the first text is displayed on the console.   
   Without this option, there is a brief time between the firmware   
   splash screen and the initialization Plymouth splash screen where the   
   kernel may clear the graphics from the firmware.   
      
   When booting with "quiet", this will result in a black flicker between   
   the UEFI firmware and Plymouth. Without "quiet", text output is briefly   
   visible as expected.   
      
   By enabling the deferred takeover, the graphics from the firmware can   
   remain in the framebuffer until either a) the kernel begins printing   
   text or b) Plymouth (or similar software) takes control and does   
   whatever it's been configured to do. In cases where flicker-free boot is   
   desired, that would typically be reusing the BGRT graphics in the   
   framebuffer and overlaying or augmenting it with additional elements   
   like a loading spinner.   
      
   Other distributions have already used the options for a while in stable   
   configurations (Fedora, NixOS, Red Hat, OpenSUSE, Arch Linux, etc.), so   
   I believe the change would be relatively low-impact. There were some   
   concerns around combining GRUB and deferred takeover, but I believe that   
   was fixed back in 2018 by Fedora.   
      
   -- System Information:   
   Debian Release: 13.2   
     APT prefers stable-updates   
     APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500,   
   'stable')   
   Architecture: amd64 (x86_64)   
      
   Kernel: Linux 6.12.57+deb13-amd64 (SMP w/2 CPU threads; PREEMPT)   
   Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=locale: Cannot set   
   LC_ALL to default locale: No such file or directory   
   UTF-8), LANGUAGE=en_US:en   
   Shell: /bin/sh linked to /usr/bin/dash   
   Init: systemd (via /run/systemd/system)   
   LSM: AppArmor: enabled   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)