Bug 12267 - DGA 1 apps compiled against 4.0 segfault when run under 3.3.6
DGA 1 apps compiled against 4.0 segfault when run under 3.3.6
Product: Red Hat Linux
Classification: Retired
Component: XFree86 (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Preston Brown
Depends On:
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Reported: 2000-06-14 11:42 EDT by Hans de Goede
Modified: 2008-05-01 11:37 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2000-08-05 21:13:33 EDT
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Description Hans de Goede 2000-06-14 11:42:08 EDT
When I compile xmame with DGA 1 support on 6.9 beta1 (and thus against 4.0)
and after that run it under a 3.3.6 server it segfaults. I can't even get a
normal window stand alone an DGA screen.

Since xmame uses only DGA 1, I would expect it to still run under 3.3.6
even if compiled against 4.0 if this is not feasable atleast I would expect
to just get an DGA not available error and be able to run in a window.
Comment 1 Jeremy Katz 2000-06-14 20:54:44 EDT
If I remember correctly, there's a general bug in DGA1 support in XFree 4.0 (ie:
it doesn't work :)  I remember hearing this is fixed in the current XFree CVS
tree; if XF 4.0.1 isn't released soon, this and the multitude of other bugs in
the released XFree4 are going to cause quite a bit of trouble :(

About compiling against the XFree 4 version, very rarely can you compile a
program against a newer lib and have it work with the older version.  The other
way around is often desirable, although not always possible.
Comment 2 Hans de Goede 2000-06-15 01:30:43 EDT
This however isn't a regular program but an X-windows program and the X protocol
is supposed to not suffer from this, if I compile xmame without DGA support it
works fine under the 3.3 servers even if compiled against the 4.0 libs.

I can even run it against the 3.3 libs.

So to be clear I'm not trying to run xmame + DGA1 suppport against 3.3 libs,
just against a 3.3 server, so we're not talking about dynamic linkijg against
older libs here, just about talking to an older server. This should work fine
(see http 1.0 vs 1.1 etc etc)

Comment 3 Hans de Goede 2000-06-30 17:28:09 EDT
I jsut tried this again with XFree-devel-4.0-0.28 from the beta2/snapshot dir on
gribble and it still happens.
Comment 4 Bill Nottingham 2000-07-03 01:13:18 EDT
Still segafaults? Crud, that was supposed to be fixed.
Comment 5 Hans de Goede 2000-07-06 18:33:57 EDT
Yes, I also tried it with the X-snapshot which was releaes a few hours later in
the /pub/X dir (0.29 I believe).

I'll try again with beta3 this weekend and lett you know.
Comment 6 Hans de Goede 2000-07-07 17:06:14 EDT
Still there in beta3
Comment 7 Hans de Goede 2000-07-27 15:28:23 EDT
Still there on beta5, come on fix this one please, it is the last anoying bug
left in 6.9 the rest of 6.9 is great.
Comment 8 Bill Nottingham 2000-08-05 21:13:31 EDT
I can't reproduce this here; xmame, aktion, etc. compiled against 4.0 X libs
seem to run OK on a 3.3.x server.
Comment 9 Bill Nottingham 2000-08-06 18:42:49 EDT
This should be fixed in 4.0.1-0.43.
Comment 10 Hans de Goede 2000-08-07 02:09:01 EDT
Heuh, I thought you couldn't reproduce it, well anyway nice to have it fix, hint
for reproducing: most apps, atleast xmame need to be run with root rights to
even try to use dga and hence trip this bug.

But I guess you've figured that out in the end. Can I get this version anywhere
before RC1?

Comment 11 Hans de Goede 2000-08-11 15:46:31 EDT
Ah its fixed in RC1, you rule! This is great, really great!

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