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Bug#163935: xdm does not start / crashes



On Tue, Jun 24, 2003 at 10:14:05PM +0200, Karsten Merker wrote:
> On Tue, Jun 24, 2003 at 12:56:10AM -0500, Branden Robinson wrote:
> > Well, I wouldn't go that far.  startx works because nothing is trying to
> > render that pixmap.  If color allocation is busted in the server for
> > PseudoColor visuals, then we *are* dealing with an X server bug.
> 
> Indeed - it looks like that is the case.
[...]
> When replacing the xserver-xfree86 package (and only this) with the version
> from Woody, everything works fine even with the "colorful" logo. I have done
> some further tests with applications that allocate a few colors. The same
> behaviour here - with the Xserver from Woody (4.1.0-16) everything is fine
> (within what you can expect from 8bit colordepth) while when running the
> current unstable Xserver (4.2.1-8) I get things like black menus with black
> text on it and alike. Running wdm on the 4.2.1 Xserver gives me a
> black-on-black login prompt; while running on the 4.1.0-16 Xserver
> everything looks fine.

This is beginning to sound familiar.

A lot of people with low bit-depth displays began having trouble in
XFree86 4.2.0 because the RENDER extension in the server preallocates a
color cube.

In fact, this color cube is 6x6x6, which means that 244 are already
pulled out of the colormap.

See:

http://www.mail-archive.com/render@xfree86.org/msg00622.html

Since I do not think there is a way to tell the X server to disable the
RENDER extension or pre-allocate a smaller colormap, the best solution
probably is to just give depth 8 users a black-and-white logo.

Thanks for following up.

-- 
G. Branden Robinson                |    The errors of great men are
Debian GNU/Linux                   |    venerable because they are more
branden@debian.org                 |    fruitful than the truths of little
http://people.debian.org/~branden/ |    men.         -- Friedrich Nietzsche

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