Re: kmscon not working on MacBook

[pelzflorian (Florian Pelz)]

On Sun, Mar 08, 2020 at 10:03:26PM +0100, Ludovic Courtès wrote:
> In the past, Mathieu, Florian, and others looked at similar issues on
> some graphics boards.  Perhaps there’s something we can do here to
> special-case this hardware?
> 
> Ludo’.

The affected hardware is diverse and I see no pattern.  I would favor
restarting with mingetty.  However, the installer runs but just has no
display, so I do not know how to detect it.

My Macbook using “NVIDIA Corporation MCP89 [GeForce 320M] (rev a2)”
runs the installer just fine.

A desktop PC using “NVIDIA Corporation GM107 [GeForce GTX 750 Ti] (rev
a2)” runs it just fine too.

Another PC using “Advanced Micro Devices, Inc. [AMD/ATI] Oland PRO
[Radeon R7 240/340]” runs the installer just fine (but not Xorg X).

A laptop Acer Aspire 5738 using “Advanced Micro Devices,
Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4530/4570/545v]” *fails*
with a black screen; manual installation is required (which I have not
tested but probably works).

Another laptop Uniwill U50SI1 using “Silicon Integrated Systems [SiS]
771/671 PCIE VGA Display Adapter (rev 10)” *fails* the same way.
Manual install works fine.  Note that I cannot boot non-Windows
install images (Debian or Guix) on this machine, only via DVD, and
Xorg X server only runs using uvesafb with a v86d helper.

None of these installers flicker; the screen is black or it runs fine.

Regards,
Florian