Xorg locks up

[Евгений Косов]

Hi, list.

My Xorg keeps locking up for unknown reason. I couldn't find out any
rule but everytime symptoms are the following:

- CPU load is about 100%
- there's no any reaction to keyboard, but mouse is still alive.
- ktrace shows that Xorg keeps invoking the same call in a cycle:


  11533 Xorg     PSIG  SIGALRM caught handler=0x8017662b0 mask=0x0 code=0x0
  11533 Xorg     CALL  sigprocmask(0x1,0,0x6e1210)
  11533 Xorg     RET   sigprocmask 0
  11533 Xorg     CALL  sigreturn(0x7fffffffe3e0)
  11533 Xorg     RET   sigreturn JUSTRETURN
  11533 Xorg     PSIG  SIGALRM caught handler=0x8017662b0 mask=0x0 code=0x0
  11533 Xorg     CALL  sigprocmask(0x1,0,0x6e1210)
  11533 Xorg     RET   sigprocmask 0
  11533 Xorg     CALL  sigreturn(0x7fffffffe3e0)
  11533 Xorg     RET   sigreturn JUSTRETURN
  11533 Xorg     PSIG  SIGALRM caught handler=0x8017662b0 mask=0x0 code=0x0
  11533 Xorg     CALL  sigprocmask(0x1,0,0x6e1210)
  11533 Xorg     RET   sigprocmask 0
  11533 Xorg     CALL  sigreturn(0x7fffffffe3e0)
  11533 Xorg     RET   sigreturn JUSTRETURN
  11533 Xorg     PSIG  SIGALRM caught handler=0x8017662b0 mask=0x0 code=0x0
  11533 Xorg     CALL  sigprocmask(0x1,0,0x6e1210)
  11533 Xorg     RET   sigprocmask 0
  11533 Xorg     CALL  sigreturn(0x7fffffffe3e0)
  11533 Xorg     RET   sigreturn JUSTRETURN
  11533 Xorg     PSIG  SIGALRM caught handler=0x8017662b0 mask=0x0 code=0x0
  11533 Xorg     CALL  sigprocmask(0x1,0,0x6e1210)
  11533 Xorg     RET   sigprocmask 0
  11533 Xorg     CALL  sigreturn(0x7fffffffe3e0)
  11533 Xorg     RET   sigreturn JUSTRETURN
  11533 Xorg     PSIG  SIGALRM caught handler=0x8017662b0 mask=0x0 code=0x0
  11533 Xorg     CALL  sigprocmask(0x1,0,0x6e1210)
  11533 Xorg     RET   sigprocmask 0
  11533 Xorg     CALL  sigreturn(0x7fffffffe3e0)
  11533 Xorg     RET   sigreturn JUSTRETURN
  11533 Xorg     PSIG  SIGALRM caught handler=0x8017662b0 mask=0x0 code=0x0
  11533 Xorg     CALL  sigprocmask(0x1,0,0x6e1210)
  11533 Xorg     RET   sigprocmask 0
  11533 Xorg     CALL  sigreturn(0x7fffffffe3e0)
  11533 Xorg     RET   sigreturn JUSTRETURN
  11533 Xorg     PSIG  SIGALRM caught handler=0x8017662b0 mask=0x0 code=0x0
  11533 Xorg     CALL  sigprocmask(0x1,0,0x6e1210)
  11533 Xorg     RET   sigprocmask 0
  11533 Xorg     CALL  sigreturn(0x7fffffffe3e0)
  11533 Xorg     RET   sigreturn JUSTRETURN
  11533 Xorg     PSIG  SIGALRM caught handler=0x8017662b0 mask=0x0 code=0x0
  11533 Xorg     CALL  sigprocmask(0x1,0,0x6e1210)
  11533 Xorg     RET   sigprocmask 0
  11533 Xorg     CALL  sigreturn(0x7fffffffe3e0)
  11533 Xorg     RET   sigreturn JUSTRETURN


The problem appeared right after I installed FreeBSD 6.2-STABLE amd64
(it was x86 before without any problem).


software:

FreeBSD 6.2-STABLE amd64
xorg-7.3_1
xfce-4.4.2


hardware:

AMD Athlon(tm) 64 Processor 3000+
ASUS M2N (with onboard video)


I'm not sure about chipset, Xorg.0.log sais:

(--) Chipset Unknown NVIDIA chip found


I've already tried to upgrade X.Org and window manager with no luck.


Is anything else needed?
Any idea what might be a reason? What should I do?

TIA

--
BR,
Eugene Kosov