Bug 234646 - kldload radeon kms - black screen
Summary: kldload radeon kms - black screen
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 12.0-RELEASE
Hardware: amd64 Any
: --- Affects Only Me
Assignee: freebsd-x11 mailing list
Depends on:
Reported: 2019-01-05 23:01 UTC by lumiwa
Modified: 2019-09-07 23:24 UTC (History)
2 users (show)

See Also:
lumiwa: maintainer-feedback? (jmd)

xorg.log and part of /var/log/messages (35.42 KB, text/plain)
2019-01-05 23:01 UTC, lumiwa
no flags Details
try to use drm-fbsd11.2-kmod from ports with atilegacy (32.98 KB, text/plain)
2019-01-07 23:22 UTC, lumiwa
no flags Details

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Description lumiwa 2019-01-05 23:01:38 UTC
Created attachment 200816 [details]
xorg.log and part of /var/log/messages

My system is FreeBSD 12.0-RELEASE (amd640), new installed on the new hard drive.
Computer is iMac with Radeom 4850 graphics card, the boot is UEFI and everything works except graphics card problem.
When I kldload /boot/modules/radeonkms.ko I got black screen and computer is still responsive.
I try also to boot computer with  hw.syscons.disable=1 in /boot/loader.conf and in /etc/rc.conf I have kldload /boot/modules/radeonkms.ko
and again black screen.
I have installed drm-legacy-kmod and xf86-video-ati-legacy but I tried also with new ati driver and drm for 12 and the same result.
On the old system when I use ati driver version 7.9 and kldload radeon.ko from kernel worked without problem. On the old system the new ATI driver didn't work and none of the drm-kmod didn't work too.
Now I am using scfb driver and it works.
I do not know if is a bug in the drivers or something else.

Thank you.

Please check attached logs.
Comment 1 lumiwa 2019-01-07 23:22:13 UTC
Created attachment 200894 [details]
try to use drm-fbsd11.2-kmod from ports with atilegacy

I deinstall drm-legacy-kmod and install drm-fbsd11.2-kmod but again black screen.
Please, check attaced logs.
Comment 2 lumiwa 2019-01-27 16:22:14 UTC
I did try to run FreeBSD 11.2 on the borrowed dock station and it boot (slow but...) and everything was O.K. - no black screen when switched to fb. I did also "startx" and open Openbox.
The difference from the new system is that on the old drive I had freebsd-boot and uefi partitions but on the new one I have just uefi.