graphics/drm-kmod: just activates one screen on 12.0 instead of both screens as on 11.2 (see local kernel hacker)

[schorsch1976]

I got an AMD Radeon Pitcarain GPU. It runs smoothly on 11.2-RELEASE with dual monitor. As i upgraded to freebsd 12.0-RELEASE it shows just one monitor. As i read on the notes that there is amdgpu driver for newer cards HD7000+.
The suggested amdgpu for HD7000+ shows the attached screenshot.

The radeonkms driver on 12.0 just activates one screen instead of both screens as on 11.2-RELEASE.

I took this screenshot (as i dont have a local kernel hacker)

[valpackett]

Are you booting with UEFI? Try disabling the EFI framebuffer with hw.syscons.disable=1. (That disables the display until the GPU driver gets loaded, but you can always SSH into the machine).

ring 0 test failed is one of the symptoms of the efifb conflict. (Though hw_init of IP block failed wasn't part of these reports…)

[schorsch1976]

Yes, i boot UEFI. What driver should i use with pitcairn? amdgpu or radeonkms?

[valpackett]

Both amdgpu and radeonkms support Pitcairn, try amdgpu first.

[schorsch1976]

With radeonkms and hw.syscons.disable=1 just one screen gets active.
With amdgpu both screens are active but x11 is not working and i get these messages:

[iotamudelta]

@schorsch1976 amdgpu is the way forward, if it's supported by your GPU, I'd recommend using that. The messages should not be harmful. Can you post your Xorg.log? You will probably want to install the xf86-video-amdgpu Xorg DDX.

[schorsch1976]

With amdgpu (i forgot xf86-video-amdgpu) i could logon and start x11. sddm was ok but as plasma5 started the screen was flickering at the beginning and when i moved the mouse, the cursor followed but the background was set to the background image. No menu showd up, right click showd just a black rectangle. I guess maybe OpenGL was not working.

Here is my xorg log.

Xorg.0.log

[iotamudelta]

Making progress! :-) Can you also confirm that the permissions on the /dev/drm devices have group video and your user is in that group?

[schorsch1976]

Yes, my user is in group video and /dev/drm is group video too.

[valpackett]

You will probably want to install the xf86-video-amdgpu Xorg DDX

Hm, it's odd that it didn't work without it. My RX 480 worked fine with modesetting. -amdgpu only reduced screen tearing.

flickering

Plasma is apparently infamous for flickering, you can try turning on full screen repaints..

also, are you on the latest version of Mesa?

[schorsch1976]

As i used amdgpu nothing changed, i used "DRI" "3" and "TearFree" "true", nothinging changed, but as i switched to "Driver "modesetting" and i removed the old ".config" folder in my home, i can work now on Plasma5 and FreeBSD 12.

I also purged the xf86-video-ati package. I am on packages / latest. I guess, this works for me now . Also works for me the amdgpu driver. The key seems to have been the old ".config" folder.

[rozle]

"Yes, my user is in group video and /dev/drm is group video too."

My user is in group video but when I boot computer without /boot/modules//kld_list="radeonkms.ko" (black screen) I do not have /dev/drm. Is it normanl, please?

[schorsch1976]

@rozle I guess yes, see comment 2 (after my first post)

[rozle]

Yes, I saw your comment 2 but it doesn't works for me and my ring tests pass.
But I have still problem and doesn't work for me.