12.04 update breaks video

[rikona]

On Sat, 2 May 2015 09:55:02 +0200
Petter Adsen <petter at synth.no> wrote:

> On Fri, 1 May 2015 12:44:15 -0700
> rikona <rikona at sonic.net> wrote:
> 
> > On Fri, 1 May 2015 14:02:40 +0200
> > Liam Proven <lproven at gmail.com> wrote:
> > > What graphics card? What driver for it? 
> > 
> > AMD A4-5300 APU with Radeon(tm) HD Graphics × 2
> > 
> > driver: ESA: DVST
> > 
> > FGLRX 3D-accelerated proprietary graphics driver for ATI cards.
> > --- activated but not currently in use
> 
> What does this last line mean? 
The last 2 lines were from looking at "additional drivers" for the
system. It seems to say FGLRX is not being used.

> What does your /var/log/Xorg.0.log say
> about your driver? There will be two lines like this:
> 
> [104101.617] (II) LoadModule: "radeon"
> [104101.617] (II) Loading /usr/lib/xorg/modules/drivers/radeon_drv.so
> 
> Except that yours might say "fglrx" instead of "radeon".

I've got:
[    19.315] (II) LoadModule: "radeon"
[    19.315] (II) Loading /usr/lib/xorg/modules/drivers/radeon_drv.so
+ many other radeon lines

also have:
[    19.290] (II) LoadModule: "fglrx"
[    19.290] (II)
Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/modules/drivers/fglrx_drv.so

and:
[    19.315] (II) LoadModule: "vesa"
[    19.316] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
which, from "driver" seems to be what is being used

How do I tell which is REALLY being used?

> 
> You can also check your "lsmod" output to see which module is loaded.

Gives me:
vesafb                 13846  1 
and:
fglrx                8080630  1564 
amd_iommu_v2           19228  1 fglrx

Thanks for the info re how to look deeper into the system - that's what
I was hoping to find out. But, I don't yet know how to interpret it
correctly - still don't know which driver is  REALLY  being used.

And, more importantly, why the black screen with any video?

Looks like somebody is trying to force me to upgrade to 14.04. :-)))
[which I plan to do, but a bit later...]