ports/184679: locking assertion failure

[celle]

>Number:         184679
>Category:       ports
>Synopsis:       locking assertion failure
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Dec 11 06:20:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     celle
>Release:        9.2 release p2
>Organization:
>Environment:
FreeBSD alisha 9.2-RELEASE FreeBSD 9.2-RELEASE #3: Mon Sep 30 04:20:55 CDT 2013     paul at alisha:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
Games/linux-ut2004-demo and full game fails to run on 9.2 on i386 and amd64 on non-kms radeon drivers. Was working on 9.1 i386 radeon before recent update and works on 9.1 on amd64 on nvidia. The demo also doesn't download from website.

fcntl: Invalid argument
WARNING: ALC_EXT_capture is subject to change!
X Error of failed request:  BadLength (poly request too large or internal Xlib length error)
  Major opcode of failed request:  137 (DRI2)
  Minor opcode of failed request:  1 ()
  Serial number of failed request:  24
  Current serial number in output stream:  24
Locking assertion failure.  Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0x2911f767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0x2911f90e]
#2 /usr/lib/libX11.so.6 [0x290500e9]
#3 /usr/lib/libX11.so.6(XSync+0x25) [0x290441d5]
#4 ./libSDL-1.2.so.0 [0x28d6f219]
#5 ./libSDL-1.2.so.0(SDL_VideoQuit+0x51) [0x28d64741]
#6 ./libSDL-1.2.so.0(SDL_QuitSubSystem+0x5a) [0x28d47c7e]
#7 ./ut2004-bin [0x8953f36]
#8 /lib/libc.so.6(exit+0x89) [0x28ec4cc9]
#9 /usr/lib/libX11.so.6 [0x290488fe]
#10 ./libSDL-1.2.so.0 [0x28d6d280]
#11 /usr/lib/libX11.so.6(_XError+0x109) [0x29048aa9]
#12 /usr/lib/libX11.so.6(_XReply+0x22e) [0x29050f2e]
#13 /usr/lib/libGL.so.1(DRI2Connect+0x9e) [0x2b40243e]
#14 /usr/lib/libGL.so.1 [0x2b40185d]
#15 /usr/lib/libGL.so.1 [0x2b3e5612]
#16 /usr/lib/libGL.so.1 [0x2b3e1b62]
#17 /usr/lib/libGL.so.1(glXChooseVisual+0x31) [0x2b3e26ae]
#18 ./libSDL-1.2.so.0(X11_GL_GetVisual+0x28e) [0x28d69d62]
#19 ./libSDL-1.2.so.0 [0x28d6e149]

Same error reproduced on i386 desktop with radeon 1600xt and laptop with amd64 with amd rs690 since 9.2 release. 
>How-To-Repeat:
# portmaster games/linux-ut2004-demo
# mount linproc
# mode 666 needed in xorg.conf for users 
$ ut2004-demo
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: