on Mon, Jul 12, 2004 at 11:34:24AM +0100, Thomas Adam ([EMAIL PROTECTED]) wrote:
> --- "Karsten M. Self" <[EMAIL PROTECTED]> wrote: 
> 
> > Typically, X freezes.  Mouse responds, but keyboard doesn't, including
> > modifier keys such as capslock, numlock, and scroll/lock.
> > <ctrl><alt><F[1-6]> doesn't take me to a console.
> 
> I get this, and there is various bug reports for the 'xserver-xfree86'
> package that allude to the symptoms descibed, but none that says it all.
> chvt() calls though are iffy at times from X-> console due to the various
> complexities that take place.
> 
> >     http://linuxmafia.com/~karsen/Images/screen-artifacts.png
> > 
> > (The artifacts are circled in yellow -- the circles aren't the artifacts
> > ;-).
> 
> That's a lie, isn't it, Karsten? :P I get a 404 trying that URI.
> 
> >   - I've _just_ upgraded yesterday to 2.6 kernel from 2.4.25, though
> >     problem appears to have existed prior to this.
> 
> 2.6 kernels have been known to break X in the manner you are having. I
> suggest trying a 2.4.X. The only thing I can suggest is for you to try a
> 2.4.X kernel and report back.


With some help from Thomas on the #debian IRC channel last night, I
managed to get my system shut down (again:  shutdown and init 0 weren't
working) and rebooted.  Well.  Took a hard boot.

At the suggestion of simonrvn and peterS, I set the 'nice' value for X
to 0 (rather than -10) in /etc/X11/Xwrapper.config.  Apparently the 2.6
kernel scheduler improvements are sufficiently good that one can bypass
the old hack of nicing X to a higher priority.


Things looked pretty good up until this evening.  Came home from work
and looked at stuff briefly around 8:30 pm, was OK.  By 11 pm X was
locked hard showing an xscreensaver hack ("Attraction (orbital)"  FWIW).



X11 is once again running at high CPU:

------------------------------------------------------------------------
top - 00:50:26 up 19:26, 31 users,  load average: 1.15, 1.20, 1.44
Tasks: 225 total,   4 running, 220 sleeping,   0 stopped,   1 zombie
Cpu(s): 24.0% us,  3.8% sy,  0.3% ni, 69.9% id,  1.2% wa,  0.1% hi,  0.6% si
Mem:    452228k total,   449304k used,     2924k free,    47492k buffers
Swap:  1060208k total,   106244k used,   953964k free,    83140k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND            
 3925 root      25   0  147m  49m  72m R 90.8 11.2 187:37.41 XFree86            
26750 karsten   16   0  2228 1060 1884 R  7.4  0.2   0:00.07 top                
 5947 karsten   15   0  9396 3812 7716 S  1.9  0.8   0:15.00 irssi              
    1 root      16   0  1528  492 1376 S  0.0  0.1   0:01.07 init               
    2 root      34  19     0    0    0 S  0.0  0.0   0:00.01 ksoftirqd/0        
    3 root       5 -10     0    0    0 S  0.0  0.0   0:00.55 events/0           
    4 root       7 -10     0    0    0 S  0.0  0.0   0:00.00 khelper            
    5 root      15 -10     0    0    0 S  0.0  0.0   0:00.00 kacpid             
   37 root       5 -10     0    0    0 S  0.0  0.0   0:02.00 kblockd/0          
   47 root      15   0     0    0    0 S  0.0  0.0   0:04.42 pdflush            
   48 root      15   0     0    0    0 S  0.0  0.0   0:07.81 pdflush            
   50 root       5 -10     0    0    0 S  0.0  0.0   0:00.00 aio/0              
   49 root      15   0     0    0    0 S  0.0  0.0   0:02.31 kswapd0            
------------------------------------------------------------------------

Thomas's next advice is to try the 2.4 kernel again, which sounds
reasonable.


Peace.

-- 
Karsten M. Self <[EMAIL PROTECTED]>        http://kmself.home.netcom.com/
 What Part of "Gestalt" don't you understand?
    We're not going to fix this by getting the pilots to be more careful.
    - Aviation industry approach to systemic improvement.

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