Mac mini PPC X.org 1.3.0 (Ubuntu gutsy) and Evesham Alqemi S LCD TV

[Alex Deucher]

On Jan 23, 2008 1:58 PM, Stuart Langridge <sil at kryogenix.org> wrote:
> (sorry, Alex, forgot to cc list)
>
>
> > > OK, just tried that. I get the same effect with the cvt-created
> > > modeline as I did before with the non-cvt 1280x720 mode; the
> > > right-hand part of the screen is oddly corrupted. (It looks to me as
> > > if the "1280x720" is only taking up the left-hand 75% of the screen,
> > > and the right-hand 25% is just uninitialised in some way, or similar?)
> >
> > do any other modes work?  720x480, 1280x768, 1366x768?  Does switching
> > VTs help in this case as well?
>
> No other modes work using HDMI. 640x480 works fine; 1280x720 (whether
> using a cvt-created modeline or not) gives the
> "right-hand-25%-of-screen-corrupted" effect as above; all other modes
> flicker for about two seconds and then the screen goes black.
> Switching VTs doesn't help.
>
> >when you use the VGA port the driver is not able to detect any
> >monitors attached so it fails.  Your adapter must block your monitor's
> >edid.  If you grab ati git master, it will back to a default output if
> >nothing is connected.  You might also try Option "TVDACLoadDetect"
> >true"
>
> I'll try that option and report back. (I'm scared of compiling X. Call
> me a wimp. :))

you don't need to rebuild everything just the driver ;)

>
> >> Ah, sorry. When X starts, the screen is entirely black/blank. A VT
> >> switch makes X appear.
> > Weird.  Can you dump the regs before and after switching the VT using
> > radeontool (http://gitweb.freedesktop.org/?p=users/airlied/radeontool.git;a=summary)?
> >
> > (as root)
> > ./radeontool regmatch '*' > before.regs
> > switch VT
> > (as root) ./radeontool regmatch '*' > after.regs
>
> Done. Both files are available at
> http://kryogenix.org/random/alqemi-s/#radeontool-hdmi and here's a
> diff between the two (I don't know which is more useful). (This
> process was a lot easier after I noticed your link to radeontool above
> rather than trying to use a program of the same name packaged for
> Ubuntu :)) I'm hoping you're now going to say something like "add
> 'radeontool --set-broken-register A=5' to your X startup and it'll fix
> it"!

Does Option "MacModel" "mini-internal" help?  Some mini's seem to use
external TMDS while others use internal.  I had to guess as I'm not
sure which are which.

Alex