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From: Krzysztof Halasa <khc@pm.waw.pl>
To: <linux-kernel@vger.kernel.org>
Subject: keyboard + PS/2 mouse locks after opening psaux
Date: 09 Oct 2001 12:21:48 +0200	[thread overview]
Message-ID: <m3elodw1tv.fsf@defiant.pm.waw.pl> (raw)

Hi,

I'm having the following problem: after I start X11 (or gpm with no X)
my keyboard and PS/2 mouse sometimes locks up. What could that be?

440BX UP celeron mobo here (Abit - BH6?), '94 AT keyboard, '2000 A4tech
2-wheel mouse, various Linux 2.4 versions (usually -ac, currently 2.4.10ac3).
I'm using NVidia Xserver module, but it doesn't seem related (the lookup
occured with no X while starting gpm once or twice).

If I kill Xserver (haven't tried with gpm), the keyboard (and mouse) start
working again (the next Xserver spawn works fine).

For me, it looks like some race condition between open_aux and mouse
(kbd?) interrupt, causing interrupts or kbd controller to stay disabled
after the mouse device is opened. The interrupt counters for both kbd
and psaux stay constant when I move the mouse and/or press buttons/keyboard
keys:

intrepid:~$ cat /proc/interrupts 
           CPU0       
  0:    1528212          XT-PIC  timer
  1:          6          XT-PIC  keyboard
  2:          0          XT-PIC  cascade
  3:     189554          XT-PIC  serial
  9:    1587447          XT-PIC  acpi, nvidia
 11:      15215          XT-PIC  usb-uhci, eth0, eth1
 12:          2          XT-PIC  PS/2 Mouse
 14:      49181          XT-PIC  ide0
 15:          1          XT-PIC  ide1
NMI:          0 
ERR:          3

I'm currently keeping this machine in locked state, so I can provide more
info.

What I also found is that open_aux routine isn't protected by lock_kernel(),
while release_aux is. Is that correct? Would a mouse interrupt received
before open_aux() is completed cause such a lookup?

-- 
Krzysztof Halasa
Network Administrator

             reply	other threads:[~2001-10-09 10:24 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-10-09 10:21 Krzysztof Halasa [this message]
2001-10-11 15:24 ` Marius Gedminas
2001-12-16  1:36 ` Krzysztof Halasa
     [not found] <200110112004.f9BK47b0070854@smtpzilla2.xs4all.nl>
2001-10-12 13:33 ` Marius Gedminas
2002-01-10 13:15 Donnie Roberts

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