[K12OSN] X starts, but turns off before GDM

[Rob Owens]

--- Angus Carr <acarr at saskforestcentre.ca> wrote:

> Rob Owens wrote:
> > --- Angus Carr <acarr at saskforestcentre.ca> wrote:
> >
> >   
> >> <Clip...>
> >>     
> >>>> All my clients are RIVA 128. I bet you are
> trying
> >>>>         
> >> to
> >>     
> >>>> run them at 16
> >>>> bit color. Xorg or Xfree86 don't support 16 bit
> >>>> color for this card. I
> >>>> have to run them at 24 bit color in lts.conf.
> >>>>
> >>>>     
> >>>>         
> >>> I fixed my problem with XSERVER = vesa, but I'd
> >>>       
> >> still
> >>     
> >>> like to know how you deal with these video
> cards. 
> >>>       
> >> I
> >>     
> >>> seem to recall an error message at one point
> about
> >>> "depth 16".  How do I stop it from trying to run
> >>>       
> >> at 16
> >>     
> >>> bit color?  Do you use XSERVER = vesa, or
> XSERVER
> >>>       
> >> =
> >>     
> >>> auto?  Do you need a special mode line?  I don't
> >>>       
> >> fully
> >>     
> >>> understand the mode lines...
> >>>
> >>> Thanks
> >>>
> >>> -Rob
> >>>   
> >>>       
> >> Google for "X_COLOR_DEPTH", which is a parameter
> in
> >> lts.conf. That's 
> >> about all you need to set, either globally or by
> >> station.
> >>
> >>  From
> >>
> >>     
> >
>
http://www.ltsp.org/documentation/lts_ig_v2.3/lts_ig_v2.3-9.html:
> >   
> >> *X_COLOR_DEPTH*
> >>
> >>     This is the number of bits to use for the
> color
> >> depth. Possible
> >>     values are *8*, *15*, *16*, *24* and *32*. 8
> >> bits will give 256
> >>     colors, 16 will give 65536 colors, 24 will
> give
> >> 16 million colors
> >>     and 32 bits will give 4.2 billion colors! Not
> >> all X servers support
> >>     all of these values. The default value for
> this
> >> is *16*
> >>     
> >
> > Thanks, that took care of it.  But now I've got
> > another question.  What is the down side of using
> the
> > vesa driver.  The reason I ask is because keeping
> > XSERVER=auto, and setting X_COLOR_DEPTH=15 gives
> me
> > worse looking graphics than XSERVER=vesa and
> leaving
> > X_COLOR_DEPTH alone.  Is vesa bad at motion?
> >
> >   
> 
> My experience with vesa modes is that they are less
> accelerated, as they 
> are designed for broad compatibility. There is some
> acceleration, but 
> not for motion video.
> By default (on i810 machines, anyway) I get an
> awful-looking desktop 
> with vesa, but 16-bit 1024x768 on the i810 driver
> (or auto).
> I suggest you try X_COLOR_DEPTH=24, given that the
> card you have won't 
> do 16 bit. It sounds like it is going to 8bit
> colour, which is only 
> vaguely describable as colour... :-)
> The VESA driver will work, but the riva driver will
> work better. The 
> riva driver should do all the 2D acceleration the
> vesa driver will do 
> and more- 3D, movies, performance.
> 
> Angus.

Wow, it worked!  I thought that when Robert said this
card wouldn't do 16 bit color, that it also meant the
card wouldn't do anything better than 16 bit--but I
was wrong.  Thanks for the suggestion.

-Rob

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