[Savage40] Small video glitches with savage snapshot

[Alex Deucher]

--- Bjorn Knutsson <bjorn+savage at update.uu.se> wrote:
> On 6 Apr 2005 12:18, Alex Deucher wrote:
> > 
> > --- bjorn+savage at update.uu.se wrote:
> > > Hi!
> > > 
> > > I downloaded and installed the driver snapshots
> > > 
> > >
> >
>
http://dri.freedesktop.org/snapshots/savage-20050314-linux.i386.tar.bz2
> > >
> >
>
http://dri.freedesktop.org/snapshots/savage-20050404-linux.i386.tar.bz2
> > > 
> > > and compared to Tim's old 1.1.27t, the snapshots seems to
> introduce a
> > > few new small glitches. I'll try switching back and forth between
> > > 1.1.27t
> > > 
> > > First, after running for a while, the top lines of video get
> garbled.
> > > 
> > > Second, I get a weird pattern across the video window every now
> and
> > > then. The garbled top lines are persistent, but go away if you,
> e.g.,
> > > move the window. The pattern comes and goes, and seems related to
> > > what's going on in other windows.
> > > 
> > > I can't seem to provoke the glitches, but if I just let the video
> > > window run (while I'm doing things in other windows), sure
> enough, it
> > > will happen.
> > > 
> > > Any idea what might be up? I'd post a screenshot of a window
> showing
> > > the glitch, but naturally, all I get is the key-color... ;-)
> > 
> > The savage streams engine is possibly the root of all evil.
> > try turning off BCIforXv in your xorg config.
> 
> I downloaded and installed:
> 
>
http://dri.freedesktop.org/snapshots/savage-20050407-linux.i386.tar.bz2
> 
> I disabled BCIforXv (from xorg.0.log):
> 
> (**) SAVAGE(0): Option: Disable use of the BCI for Xv
> 
> But both glitches are still present.
> 
> As before, if I drop Tim's 1.1.27t instead, I do not see these
> glitches.
> 
> The glitch relating to the top lines I only seem to get in xine,
> while
> the pattern happens in both xine and mplayer. I should note, however,
> that xine is my preferred viewer, so I've "tested" this much more
> exhaustively with xine. I'll switch to using mplayer for a while and
> see if I catch it there.
> 
> The shape of the pattern depends on the width of the video stream,
> and
> will be resized if you resize the content of the window, i.e., it's
> like it's part of the original video, rather than a glitch that
> overwrites the current window.
> 
> For one width, it looks somthing like this:
> 
> ****     ****     ****
>     ****     ****     ****
>         ****     ****     ****
>             ****     ****     ****
> 
> across the video window. For another width, they're boxes:
> 
>     ****    ****    ****    ****
>     ****    ****    ****    ****
>     ****    ****    ****    ****
>     ****    ****    ****    ****
> 
> One easy way to provoke them to appear is to scroll a firefox-window
> next to the video window. The exact bit pattern of the pattern will
> change as you scroll, which makes me think that the pattern is
> actually a rectangle of the current screen that for some reason gets
> mapped into the video window, with different skews depending on the
> video window width. (We get the rectangles if the video window width
> is an integral multiple of the rectangle width.)
> 
> /Bjorn
> 

Can you try disabling the DRI and see if that fixes the video problem?
comment out the load dri line in the modules section of your config.
It may be a FIFO/bandwidth issue that shows up when 3D is configured. 
Also what chip do you have?

Alex



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