[Bug 24766] New: 32-bit libGL.so searches for DRI modules in /usr/lib/dri instead of /usr/lib32/dri

http://bugs.freedesktop.org/show_bug.cgi?id=24766

           Summary: 32-bit libGL.so searches for DRI modules in /usr/lib/dri
                    instead of /usr/lib32/dri
           Product: Mesa
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: GLX
        AssignedTo: mesa3d-dev@...
        ReportedBy: hyperair@...


Created an attachment (id=30758)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=30758)
Additionally search in /usr/lib/dri/<host, e..g. i486-pc-linux.gnu>/ for DRI
modules

On Ubuntu Karmic x86_64, all 32-bit applications which use DRI fail to have
Direct Rendering due to libGL.so searching in /usr/lib/dri, which contains
64-bit DRI modules instead of /usr/lib32/dri.

One of the bugs that this has caused is
http://bugs.winehq.org/show_bug.cgi?id=20448, which occurs in combination with
http://bugs.freedesktop.org/show_bug.cgi?id=23335.


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--- Comment #1 from Julien Cristau <jcristau@...>  2009-10-27 12:44:10 PST ---
On Tue, Oct 27, 2009 at 11:40:05 -0700, bugzilla-daemon@... wrote:

> On Ubuntu Karmic x86_64, all 32-bit applications which use DRI fail to have
> Direct Rendering due to libGL.so searching in /usr/lib/dri, which contains
> 64-bit DRI modules instead of /usr/lib32/dri.
>
> One of the bugs that this has caused is
> http://bugs.winehq.org/show_bug.cgi?id=20448, which occurs in combination with
> http://bugs.freedesktop.org/show_bug.cgi?id=23335.

sounds like a packaging issue rather than a mesa bug?


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--- Comment #2 from Chow Loong Jin <hyperair@...>  2009-10-27 13:31:25 PST ---
Well, the other way would be to recompile every 32-bit library within ia32-libs
with --libdir=/usr/lib32, which doesn't seem like a particularly good idea to
me either.


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--- Comment #3 from Dan Nicholson <dbn.lists@...>  2009-10-27 14:09:35 PST ---
Why not just build mesa so that the paths are correct? There's even a switch,
--with-dri-driverdir, that sets this correctly. I don't think things will work
correctly if they get moved around after the installation. If Ubuntu multiarch
uses /usr/lib32 for 32 bit libraries, why not just build with
--libdir=/usr/lib32?

If we really want to extend the search path, I'd rather keep the current
default and allow overriding with --with-dri-searchpath or something.


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--- Comment #4 from Chow Loong Jin <hyperair@...>  2009-10-27 16:50:16 PST ---
Building with --libdir=/usr/lib32 won't work, since 32-bit machines do use
/usr/lib after all. The whole point of this was to avoid the requirement of
rebuilding with different configure arguments, so that all the 32-bit libraries
can be treated the same way (just repacking) for the multiarch ia32-libs
package.

As for --with-dri-searchpath, I think that can be handled without too many
changes to the build system. If you're sure you'd like it that way, I can come
up with a patch to make it that way. I just don't have a lot of time to spare a
the moment and don't want to come up with numerous patches that get rejected
one by one.


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--- Comment #5 from Dan Nicholson <dbn.lists@...>  2009-10-27 17:26:47 PST ---
I don't think you can have it both ways. If your system's ABI is 32 bit in
/usr/lib32 and 64 bit in /usr/lib, then you should probably build the binaries
that way. If you want your system's ABI to be compatible with a 32 bit only
system, then put the 64 bit libraries in /usr/lib64 like everybody else.

Mesa libGL is certainly not the only library that dlopen's modules from private
directories. What would you do about, say, gstreamer?

I would commit a patch that changes the search path via a configure argument as
long as it doesn't change the default.


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--- Comment #6 from Corbin Simpson <MostAwesomedude@...>  2009-10-27 18:01:15 PST ---
Multilib distributions always have extra baggage on their shoulders, and this
is just one more bit of it. I'm really struggling to see how this is our
problem when we've got not just a compile-time flag (--with-dri-driverdir) but
also a run-time environment variable (LIBGL_DRIVERS_PATH) to configure this.

I'd like to close as NOTOURBUG, but I'd like to make sure that nobody else
wants to follow up on this. I also heavily encourage the original reporter to
follow up with Ubuntu directly.


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--- Comment #7 from Chow Loong Jin <hyperair@...>  2009-10-27 19:07:18 PST ---
@Dan Nicholson: Sticking 64-bit libraries into /usr/lib64 instead of /usr/lib
would require changing Debian's packaging policy as well as every derivative of
Debian's policy to accomodate one library that won't work otherwise.

I'm not actually sure about what the case is like for GStreamer. However, the
approach I am proposing is actually used within Gtk for loading modules which
are usually found in /usr/lib/gtk-2.0 (i.e. it also searches within
/usr/lib/gtk-2.0/<GTK_HOST> where GTK_HOST is defined to the $host found from
configure. In fact,
https://bugs.launchpad.net/ubuntu/+source/ia32-libs/+bug/369498 is what I was
referring to when I came up with the patch.

@Corbin Simpson: The compile time flag --with-dri-driverdir would fail if I set
more than one path there, e.g. /usr/lib/dri:/usr/lib/dri/i486-pc-linux-gnu, and
the LIBGL_DRIVERS_PATH environment variable would require that every 64-bit
user running 32-bit OpenGL applications set the environment variable, which is
hardly what I would consider appropriate.


Also, you both were mentioning "changing the defaults". The patch I propose
does not change the defaults, it just adds an extra search path. The original
search path is preserved.

Either way, if you wouldn't mind committing a patch that changes the path via a
configure argument, then I'll just write up a patch that does that instead.


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--- Comment #8 from Chow Loong Jin <hyperair@...>  2009-10-27 19:08:26 PST ---
For reference, https://bugs.launchpad.net/ubuntu/+source/ia32-libs/+bug/248392
is the original bug downstream.


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--- Comment #9 from Dan Nicholson <dbn.lists@...>  2009-10-27 23:00:35 PST ---
(In reply to comment #7)
> @Dan Nicholson: Sticking 64-bit libraries into /usr/lib64 instead of /usr/lib
> would require changing Debian's packaging policy as well as every derivative of
> Debian's policy to accomodate one library that won't work otherwise.

So debian's policy is that 32 bit libraries go in /usr/lib32 on x86_64 but
their 32 bit libraries aren't actually installed there? So, is this is
multiarch or not? It sounds like it's not intended to be multiarch.

I would agree with Corbin that this is NOTABUG since this case is pretty
convoluted and no one has ever needed it before. However, if you write a patch
that sets the search path from configure and leaves the current default (not
extending it with a path that hasn't been needed), then I'll commit it for you.

You may want to open a bug in ubuntu to see what the developers say. If this is
a debian/ubuntu policy, then I don't know why it hasn't come up before.


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--- Comment #10 from Chow Loong Jin <hyperair@...>  2009-10-27 23:24:14 PST ---
(In reply to comment #9)
> (In reply to comment #7)
> > @Dan Nicholson: Sticking 64-bit libraries into /usr/lib64 instead of /usr/lib
> > would require changing Debian's packaging policy as well as every derivative of
> > Debian's policy to accomodate one library that won't work otherwise.
>
> So debian's policy is that 32 bit libraries go in /usr/lib32 on x86_64 but
> their 32 bit libraries aren't actually installed there? So, is this is
> multiarch or not? It sounds like it's not intended to be multiarch.
It's not trivial to change the userland, and the package manager does not
natively support multiarch. ia32-libs exists because of the need for 32-bit
libraries in 64-bit.

> I would agree with Corbin that this is NOTABUG since this case is pretty
> convoluted and no one has ever needed it before. However, if you write a patch
> that sets the search path from configure and leaves the current default (not
> extending it with a path that hasn't been needed), then I'll commit it for you.
Will do.

> You may want to open a bug in ubuntu to see what the developers say. If this is
> a debian/ubuntu policy, then I don't know why it hasn't come up before.
I'm not sure about ia32-libs' history as I've only switched to 64-bit Ubuntu
relatively recently (after Ubuntu 9.04's release), but I've talked to other
developers and am personally an Ubuntu Contributing Developer myself. The bug
in Ubuntu which I linked in comment #8 was filed on 2008-07-14, but never
really got much attention, probably because not many actually played 32-bit GPU
intensive games on 64-bit Ubuntu with Intel graphics.

I myself did not notice that Wine was not getting direct rendering until the
whole issue with Wine segfaulting as a result of a bad FBO returned by mesa
under indirect rendering took place.


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Chow Loong Jin <hyperair@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #30758|0                           |1
        is obsolete|                            |




--- Comment #11 from Chow Loong Jin <hyperair@...>  2009-10-28 00:25:15 PST ---
Created an attachment (id=30761)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=30761)
Add --with-dri-driver-searchdirs configure flag

This patch adds the --with-dri-driver-searchdirs configure flag which will
append the provided path to ${DRI_DRIVER_SEARCH_DIR} if present.


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--- Comment #12 from Henri Verbeet <hverbeet@...>  2009-10-28 03:36:33 PST ---
(In reply to comment #9)
> You may want to open a bug in ubuntu to see what the developers say. If this is
> a debian/ubuntu policy, then I don't know why it hasn't come up before.
>
For what it's worth, we do get a number of bug reports from people with broken
32 bit OpenGL setups both for Wine and CrossOver, so the issue certainly isn't
new. Wine using FBOs by default in combination with bug 23335 just made it a
lot more noticeable for most people. Ultimately it's the responsibility of the
distribution to not screw this up, but if Mesa can do anything to make that
easier that's appreciated of course.


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Dan Nicholson <dbn.lists@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED




--- Comment #13 from Dan Nicholson <dbn.lists@...>  2009-10-28 20:46:24 PST ---
(In reply to comment #11)
> Created an attachment (id=30761)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=30761) [details]
> Add --with-dri-driver-searchdirs configure flag
>
> This patch adds the --with-dri-driver-searchdirs configure flag which will
> append the provided path to ${DRI_DRIVER_SEARCH_DIR} if present.

That looks good, but I don't think $DRI_DRIVER_INSTALL_DIR should be forced in
ahead of the user value. If they decide to override the default, they should be
in full control of the path. Also, do you mind chaning the option to
--with-dri-searchpath to keep it a little more concise?


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Chow Loong Jin <hyperair@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #30761|0                           |1
        is obsolete|                            |




--- Comment #14 from Chow Loong Jin <hyperair@...>  2009-10-29 00:12:50 PST ---
Created an attachment (id=30786)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=30786)
Add --with-dri-searchpath configure flag

As requested, it is --with-dri-searchpath now.


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Dan Nicholson <dbn.lists@...> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED




--- Comment #15 from Dan Nicholson <dbn.lists@...>  2009-10-30 06:03:21 PST ---
Pushed as 35506dec6734a1ae777dc16981cb19e514f41897 with an additional change so
the dri pkgconfig file doesn't break.

Thanks. Now you just have to get the Ubuntu people to rebuild in the right way.
:)


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