freebsd downgrade

[Stari Karp]

On Thu, 2015-07-23 at 16:51 -0700, Xin Li wrote:
> On 07/23/15 16:21, Stari Karp wrote:
> > Hi!
> > 
> > I had a problems with FreeBSD 10.2-BETA2. I used freebsd-update
> > ugrade and update FreeBSD 10.1-RELEASE. Is it possible to downgrade
> > BETA2 to 10.1-RELEASE with freebsd-update upgrade -r 10.1-RELEASE,
> > please?
> 
> It's not supported (because you may be running binaries that depends
> on new kernel).
> 
> What kind of problems did you have?  Please let re@ know so we can get
> them fixed.
> 
> Cheers,

I have a post in FreeBSD Stable maling list about my problem. A subject
is: FreeBSD 10.1_RELEASE to FreeBSD 10.2 BETA2

And I wrote:
" Hi!

I upgrade 10.1-RELEASE (amd64) with freebsd-update upgrade to
 FreeBSD 10.2-BETA2 #0 r285646: Fri Jul 17 01:09:28 UTC 2015
root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

and now I have some problems:

1. VT module doesn't load. 
   In /boot/loader.conf I have:
   kern.vty=vt
but it doesn't work. If I manual loada module witk kldload radeonkms I
got just black screen and nothing more.

2. Fireware external disk doesn't work either. In /boot/loader.conf I
have sbp_load="YES" but it doesn't load. If I run kldload sbp it load
and works.
3. The same is with web camera.
   cuse4bsd_load="YES" which I have in /boot/loader.conf doesn't load.
It works if I load with kldload.
In /boot/loader.conf I have also loader_logo="beastie" which doesn't
show picture in menu (it is default one).

In /boot/device.hints I have also some hits which are for my sound card
and it doesn't read them and sound doesn't work correct too.

On FreeBSD 10.1-RELEASE (amd 64) I didn't have problems."

 

Thank you.