radeon and drm-kmod still problem

[Greg V]

On Sat, Oct 27, 2018 at 12:55 PM, starikarp at yandex.com wrote:
> Hi!
> 
> I do not know if I am doing something wrong or just doesn't work on my
> computer.
> My system: FreeBSD 11.2-RELEASE-p4 (GENERIC md64), computer iMac 11,1,
> boot manager rEFit, graphics card Radeon HD 4850 (on the FreeBSD wiki
> page looks like is supported). And I am using portsnap for updating
> ports.
> Yesterday I tried again:
> Built drm-kmod which pulled also drm-stable-kmod and 
> gpu-firmware-kmod.
> All three were built without problems.
> I put in /etc/rc.conf kld_list="/boot/modules/radeonkms.ko" and in
> /boot/loader.conf:
> hw.syscons.disable=1
> kern.vty="vt"
> 
> I have a question about setting hw.syscons... Shoutl be:
> set hw.syscons.disable="1"
> or just
> hw.syscons.disable=1

'set' is a command you can use in the loader prompt.
In the loader.conf file, it's just the variable and value, no 'set'.

> because I f I have the last settings or not computer doing the same:
> after swith to vt it became black with a little tingling and nothing
> happened.

The "tingling" is exactly what's supposed to happen (no EFI 
framebuffer).
The driver should load then and enable display again.
Looks like it failed to load.

You can SSH into the machine to read dmesg, retry loading driver 
modules, etc.

> In the /var/messages I got also radeon/RV770_pfp.bin: could not load
> firmware image, error 2
> radeon/RV770_rlc.bin: could not load firmware image, error 2
> radeon/RV770_smc.bin: could not load firmware image, error 2
> radeon/RV770_uvd.bin: could not load firmware image, error 2
> 
> I did try also ati-legacy drivers but result was the same.

Do you mean ati-legacy for Xorg only?
Try kernel modules from drm-legacy-kmod instead of drm-stable-kmod.