Kernel modules and updates (problems with graphics/drm-stable-kmod)

[Niclas Zeising]

On 10/29/18 12:23 PM, Arrigo Marchiori via freebsd-stable wrote:
> Dear All,
> 
> I am encountering a strange problem with port graphics/drm-stable-kmod.
> My system is a 11.2-STABLE amd64 with GENERIC kernel.
> 
> I upgrade the base system every week or two from source.  My
> /etc/make.conf lists graphics/drm-stable-kmod in PORTS_MODULES, in
> order to have it recompiled with every kernel.
> 
> When I install the new kernel, run mergemaster and reboot, however,
> Xorg is unable to drive the video card: something goes wrong with DRM
> and he tty belonging to Xorg remains black. The other tty's work
> well.
> 
> I tracked down the problem to the file /boot/kernel/radeonkms.ko
>                                               ^^^^^^
> If I delete that file and reboot, Xorg works fine.
> 
> My question is: why is that file there? The port
> graphics/drm-stable-kmod installs its module in
> /boot/modules/radeonkms.ko but the other version from /boot/kernel/
>        ^^^^^^^                                               ^^^^^^
> seems to be loaded instead, and therefore Xorg does not work.
> 
> Is this a bug of either installkernel, or the port? Or am I doing
> anything wrong?
> 
> Thank you in advance,
> 

Hi!
/boot/kernel/radeonkms.ko is part of the old drm driver that is in base 
on 11.2 and 12.  In order to load the module from drm-stable-kmod you 
need to specify the whole path, /boot/modules/radeonkms.ko when loading 
the module.
Regards
-- 
Niclas Zeising