Comment # 22 on bug 1193596 from Jiri Slaby

(In reply to Jonas Kvinge from comment #20)
> This line is on Leap, but missing on Tumbleweed:
> 
> <6>[    3.497912] fb0: switching to vc4 from EFI VGA

Dunno, Thomas?

(In reply to Jonas Kvinge from comment #21)
> The following drivers seem to be missing on Tumbleweed, but exists on Leap:
> 
> dracut: drwxr-xr-x   3 root     root            0 May 28 12:37
> lib/modules/5.14.21-150500.55.65-default/kernel/drivers/video/fbdev
> dracut: drwxr-xr-x   2 root     root            0 May 28 12:37
> lib/modules/5.14.21-150500.55.65-default/kernel/drivers/video/fbdev/core
> dracut: -rw-r--r--   1 root     root         2672 May 23 10:43
> lib/modules/5.14.21-150500.55.65-default/kernel/drivers/video/fbdev/core/
> fb_sys_fops.ko.zst
> dracut: -rw-r--r--   1 root     root         3445 May 23 10:43
> lib/modules/5.14.21-150500.55.65-default/kernel/drivers/video/fbdev/core/
> syscopyarea.ko.zst
> dracut: -rw-r--r--   1 root     root         3790 May 23 10:43
> lib/modules/5.14.21-150500.55.65-default/kernel/drivers/video/fbdev/core/
> sysfillrect.ko.zst
> dracut: -rw-r--r--   1 root     root         3208 May 23 10:43
> lib/modules/5.14.21-150500.55.65-default/kernel/drivers/video/fbdev/core/
> sysimgblt.ko.zst
> 
> I'm guessing that's the cause.

Unlikely, they are only built in due to Thomas' work to switch away from fbdev
to drm:
commit 89d164b1ef6ca37535ed164fc7df25580a51adf7
Author: Thomas Zimmermann <tzimmermann@suse.de>
Date:   Mon Jan 31 09:54:23 2022 +0100

    config: x86-64: Enable DRM stack for early-boot graphics (boo#1193472)