The blanking from GRUB_TIMEOUT>0 will be made much worse by CONFIG_FB_EFI=n because usually in Ubuntu it's the efifb that restores the logo after Grub has wiped it. I think not having CONFIG_FB_EFI at the same time as using GRUB_TIMEOUT>0 explains your previous "really long time of a black screen".
I can tell you've restored GRUB_TIMEOUT=0 in the video and the one remaining screen blank at Plymouth's startup might be bug 1836858. But either way it's not this bug. Related bugs can be found at https://bugs.launchpad.net/ubuntu/+bugs?field.tag=flickerfreeboot -- 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/1970069 Title: Annoying boot messages interfering with splash screen Status in linux package in Ubuntu: In Progress Status in plymouth package in Ubuntu: Invalid Status in systemd package in Ubuntu: New Bug description: Since upgrading from 20.04.6 Desktop to 22.04, the boot screen is not as clean as it used to be. Basically, the flow used to be in 20.04: GRUB > Splash screen > Login prompt Currently in 22.04: GRUB > Splash screen > Messages (in the attached file) > Splash screen again for a sec > Login prompt All of those messages already existed in 20.04, the difference is that they were not appearing during boot. I was able to get rid of the "usb" related messages by just adding "loglevel=0" in GRUB. Currently is "quiet loglevel=0 splash". Regarding the fsck related message, I can get rid of them by adding "fsck.mode=skip". However, I do not want to just disable fsck or set the loglevel to 0. This is not a sustainable solution. Something definitely changed here. These messages are not of enough relevance to be shown at boot by default, and they should remain hidden like they were in Focal. Obviously a minor issue, but important to the whole look and feel of the OS for desktop. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1970069/+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
