Xorg 6.9.0: strange holding -> keyboard not works

[Andrey V. Elsukov]

Hi.

I have recently updated my system to RELENG_6. Also i've updated more programms from ports.

> pkg_info -x xorg | grep Info
Information for xorg-6.9.0:
Information for xorg-clients-6.9.0_2:
Information for xorg-documents-6.9.0:
Information for xorg-fonts-100dpi-6.9.0_1:
Information for xorg-fonts-75dpi-6.9.0_1:
Information for xorg-fonts-cyrillic-6.9.0_1:
Information for xorg-fonts-encodings-6.9.0_1:
Information for xorg-fonts-miscbitmaps-6.9.0_1:
Information for xorg-fonts-truetype-6.9.0:
Information for xorg-fonts-type1-6.9.0:
Information for xorg-fontserver-6.9.0_1:
Information for xorg-libraries-6.9.0:
Information for xorg-manpages-6.9.0:
Information for xorg-nestserver-6.9.0:
Information for xorg-printserver-6.9.0_1:
Information for xorg-server-6.9.0_3:
Information for xorg-vfbserver-6.9.0_1:

> pkg_info -x nvidia | grep Info
Information for nvidia-driver-1.0.8178_1:

> pkg_info -x mplayer | grep Info
Information for mplayer-gtk-esound-0.99.7_13:
Information for mplayer-skins-1.1.2_1:

My window manager is fluxbox, i try to open video file and my system go to 
console and seems frozen. 
I've try to power off via ACPI and the system was correctly shutting down.
After reboot i've tried again. And have tried connect to my system from another
computer. Successfull. I've looked to top(1):
...
868 butcher       1 131    0 32788K 27232K RUN      5:06 98.97% Xorg
..
I've tried ktrace(1). http://butcher.heavennet.ru/ktrace.out.gz
> kdump -R
...
   868 Xorg     0.019886 PSIG  SIGALRM caught handler=0x80da0cc mask=0x400400 code=0x0
   868 Xorg     0.000013 CALL  sigreturn(0xbfbfdc40)
   868 Xorg     0.000003 RET   sigreturn JUSTRETURN
   868 Xorg     0.019976 PSIG  SIGALRM caught handler=0x80da0cc mask=0x400400 code=0x0
   868 Xorg     0.000013 CALL  sigreturn(0xbfbfdc40)
   868 Xorg     0.000003 RET   sigreturn JUSTRETURN
   868 Xorg     0.019985 PSIG  SIGALRM caught handler=0x80da0cc mask=0x400400 code=0x0
   868 Xorg     0.000012 CALL  sigreturn(0xbfbfdc40)
   868 Xorg     0.000003 RET   sigreturn JUSTRETURN
   868 Xorg     0.019984 PSIG  SIGALRM caught handler=0x80da0cc mask=0x400400 code=0x0
   868 Xorg     0.000012 CALL  sigreturn(0xbfbfdc40)
   868 Xorg     0.000003 RET   sigreturn JUSTRETURN
   868 Xorg     0.019986 PSIG  SIGALRM caught handler=0x80da0cc mask=0x400400 code=0x0
...

I've tried 
> kill 868
Process was not killed.
> kill -KILL 868
Process was killed and system was unfrozen.

What is this? What i can do for resolve this problem?
-- 
WBR, Andrey V. Elsukov