drm, irqs, etc.

[Mike Hoskins]

first, i apologize...  i didn't think i'd get real answers on -questions
so i'm posting this here.  i realize 5.x isn't really "stable" yet, but i
hope it's close enough to be relevant.  ;)

i've got XFree86 4.3.0 installed, from the "X-4" meta port.  that went
smoothly.  using the mga driver with a matrox g450 (dual head).  no dri on
head 2 as expected, but again no obvious problems.

what i've noticed (this is 5.1-p8) is that after X has been running for
awhile, trying to exit X causes a hang.  at first i thought it was some
program under X not exiting properly (that's what it looks like), but i've
reproduced the same behavior with nothing but X running.  if i start X and
then exit immediately, everything is fine.  this seems to only happen
after X runs for a week or more.

the one thing i noticed, was some "interesting" behavior wrt drm and it's
claimed IRQ.  before starting X (after a reboot), `ps ax|grep irq` shows:

   19  ??  WL     0:00.00  (irq9: pcm0 acpi0)
   20  ??  WL     0:00.10  (irq14: ata0)
   21  ??  WL     0:00.00  (irq15: ata1)
   22  ??  WL     0:00.00  (irq10: fxp0)
   23  ??  WL     0:00.00  (irq6: fdc0)
   24  ??  WL     0:00.01  (irq1: atkbd0)

the same from within X shows,

   19  ??  WL     0:00.00  (irq9: pcm0 acpi0)
   20  ??  WL     0:01.05  (irq14: ata0)
   21  ??  WL     0:00.00  (irq15: ata1)
   22  ??  WL     0:00.02  (irq10: fxp0)
   23  ??  WL     0:00.00  (irq6: fdc0)
   24  ??  WL     0:00.08  (irq1: atkbd0)
   25  ??  WL     0:00.09  (irq12: psm0)
  690  ??  WL     0:00.12  (irq11: drm0)

and once exiting X (immediately, when it exits without hanging),

   19  ??  WL     0:00.00  (irq9: pcm0 acpi0)
   20  ??  WL     0:01.04  (irq14: ata0)
   21  ??  WL     0:00.00  (irq15: ata1)
   22  ??  WL     0:00.02  (irq10: fxp0)
   23  ??  WL     0:00.00  (irq6: fdc0)
   24  ??  WL     0:00.07  (irq1: atkbd0)
   25  ??  WL     0:00.06  (irq12: psm0)
  690  ??  WL     0:00.08  (irq11:)

is irq11 not being freed?  or is that normal behavior?  i've double
checked by X config, but i may have something wrong.  i've read various
web pages and XFree's suggestions about configuring the g450...  but,
again, i may have overlooked something.

this is a hard hang...  ctrl-alt-bkspc, ctrl-alt-del, etc. have no effect.
i've since enabled "NoTrapSignals" in my X config hoping to get a core
dump the next time it happens.  if i can manage that, i'll include it in a
future report.  (or any other info you think is relevant.)

please CC me directly with any replies, i am not currently subscribed to
-stable.

thanks,

-mrh

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