Syslinux - Mar 2021 - Equivalent to GRUB_GFXPAYLOAD_LINUX=keep with vesamenu?

On Wed, Mar 17, 2021 at 10:35 PM nerdopolis via Syslinux <
syslinux at syslinux.org> wrote:
> ...
> OK, I am realizing that in syslinux there IS a special case for
> vga=current / vga>
>
https://repo.or.cz/syslinux.git/blob/346d2278e23f1b9f02903506753263ad7226de58:/com32/lib/syslinux/load_linux.c#l497
>
> Trying that option I do see much different behavior. It doesn't flush
the
> display, as if though going into text mode (which is a good start), but it
> appears The kernel never creates the /dev/fb0 device like it does with grub
> starting it.
> ...
>
From
https://github.com/torvalds/linux/blob/master/Documentation/fb/vesafb.rst:

" ... You should compile in both vgacon (for text mode) and vesafb (for
graphics mode). Which of them takes over the console depends on whenever
the specified mode is text or graphics. ..."

I wonder if the kernel is falling back to text mode because it doesn't
recognize "vga=current" as a graphics mode? Maybe you can force it
with
"video=vesafb:on" (or maybe "video=efifb:on" if you are
using syslinux.efi).

On Thursday, March 18, 2021 12:58:46 AM EDT Gregory Bartholomew
wrote:
> On Wed, Mar 17, 2021 at 10:35 PM nerdopolis via Syslinux <
> syslinux at syslinux.org> wrote:
> 
> > ...
> > OK, I am realizing that in syslinux there IS a special case for
> > vga=current / vga> >
> >
https://repo.or.cz/syslinux.git/blob/346d2278e23f1b9f02903506753263ad7226de58:/com32/lib/syslinux/load_linux.c#l497
> >
> > Trying that option I do see much different behavior. It doesn't
flush the
> > display, as if though going into text mode (which is a good start),
but it
> > appears The kernel never creates the /dev/fb0 device like it does with
grub
> > starting it.
> > ...
> >
> 
> From
> https://github.com/torvalds/linux/blob/master/Documentation/fb/vesafb.rst:
> 
> " ... You should compile in both vgacon (for text mode) and vesafb
(for
> graphics mode). Which of them takes over the console depends on whenever
> the specified mode is text or graphics. ..."
> 
> I wonder if the kernel is falling back to text mode because it doesn't
> recognize "vga=current" as a graphics mode? Maybe you can force
it with
> "video=vesafb:on" (or maybe "video=efifb:on" if you are
using syslinux.efi).
> 
I tried the VGA option as hex, and as =current, so it might not be the kernel 
not recognizing it, but I wonder if I am missing something in the dmesg 
output...

I tried video=vesafb:on and that doesn't seem to work
BTW: I am using isolinux.bin

Thanks