Re: Call for Foundation-supported Project Ideas

On 1/4/22, Warner Losh <imp@bsdimp.com> wrote:
> Not without loading the xorg graphics stuff... graphics chips from the last
> 15 or 20 years have lots of chip specific state that only the graphics
> stuff knows about... IIRC, it only knows about it because it put the
> graphics into a known state... it's the main reason laptops stopped
> suspending in the early 2000s... it looks to be a lot of work for a
> relatively rare use case...

UEFI GOP seems to have the necessary functionalities
(https://wiki.osdev.org/GOP#Get_the_Current_Mode) so I guess the work
required would be limited (restore mode and redraw screen from
buffer).

With non-UEFI or old UGA UEFI implementations possibly one could use
the dual BIOS´ CSM part. Just call the CSM BIOS init to set up GPU and
the int 10h interface, and then set previously used mode+redraw.
BTW, doing that also could both enable vt(4) to change
modes/resolutions and using sc on UEFI computers.

But I think you are right, there are probably not too many users who
would make use of that.


On 1/4/22, Warner Losh <imp@bsdimp.com> wrote:
> On Mon, Jan 3, 2022, 11:03 PM Stefan Blachmann <sblachmann@gmail.com>
> wrote:
>
>> Implementing S3 suspend/resume was a sponsored project itself.
>> However, it still does only work when at xorg graphics mode, which
>> already was topic in this thread.
>> When using it from console, no matter sc or vt, it still hangs with
>> dark screen and unresponsive keyboard.
>> Could finishing the suspend/resume work be sponsored, so that it also
>> works on console-only computers?
>>
>
> Not without loading the xorg graphics stuff... graphics chips from the last
> 15 or 20 years have lots of chip specific state that only the graphics
> stuff knows about... IIRC, it only knows about it because it put the
> graphics into a known state... it's the main reason laptops stopped
> suspending in the early 2000s... it looks to be a lot of work for a
> relatively rare use case...
>
> Warner
>
>
>> On 12/30/21, Joseph Mingrone <jrm@freebsd.org> wrote:
>> > On Thu, 2021-12-30 at 14:15, Joseph Mingrone <jrm@FreeBSD.org> wrote:
>> >
>> >> On Thu, 2021-12-30 at 08:05, Özkan KIRIK <ozkan.kirik@gmail.com>
>> >> wrote:
>> >>> I've ideas about enhancing the routing architecture. Is it possible
>> >>> to
>> >>> add to wiki?
>> >
>> >> Certainly.  Please do.
>> >
>> > The link again is https://wiki.freebsd.org/2021FoundationCFI
>> >
>>
>>
>