Zoltan Devai 59bdb43769 Input: pcspkr - fix PIT lockup on some chipsets ... There've been reports [1] about the sysem bell causing a hard lockup. My machine was affected as well: any speaker output hung the machine completely, nothing in the logs, no magic sysrq, etc., looked like a hardware problem. Had a closer look on the issue, and it turned out that the pcspkr module is responsible. The cause is the bad setup of Timer 2 in the i8253 controller, which probably hangs the whole PIT controller. Intel datasheets [2] state that the timer registers are in an undefined state after reset and they need to be programmed before enabling the timer. (And enabling without programming the frequency first doesn't make sense anyway). I don't know which chipsets are affected (if not all), it also depends on the BIOS whether it initializes the timer (e.g. to beep when you start the machine). The following patch solved the issue on my ICH6 notebook, couldn't test it with any others, but should be safe to apply. [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/146151 https://bugs.launchpad.net/ubuntu/+bug/270790 http://ubuntuforums.org/showthread.php?t=227693 http://bugs.gentoo.org/show_bug.cgi?id=222583 https://bugzilla.redhat.com/show_bug.cgi?id=454225 [2] http://www.intel.com/assets/pdf/datasheet/252516.pdf http://www.intel.com/assets/pdf/datasheet/301473.pdf http://www.intel.com/design/chipsets/datashts/29065503.pdf Signed-off-by: Zoltan Devai <zdevai@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>		2008-11-19 16:54:59 -05:00
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gameport	Input: struct device - replace bus_id with dev_name(), dev_set_name()	2008-10-30 09:29:05 -04:00
joystick	USB: remove info() macro from usb input drivers	2008-10-17 14:41:10 -07:00
keyboard	Input: omap-keypad - allow more than 6 rows	2008-10-29 00:28:58 -04:00
misc	Input: pcspkr - fix PIT lockup on some chipsets	2008-11-19 16:54:59 -05:00
mouse	Input: appletouch - driver refactoring	2008-10-29 00:28:30 -04:00
serio	Input: struct device - replace bus_id with dev_name(), dev_set_name()	2008-10-30 09:29:05 -04:00
tablet	USB: remove info() macro from usb input drivers	2008-10-17 14:41:10 -07:00
touchscreen	Input: usbtouchscreen - fix TSC-10 DM USB controllers without EEPROM	2008-11-19 16:53:58 -05:00
apm-power.c
evbug.c	Input: struct device - replace bus_id with dev_name(), dev_set_name()	2008-10-30 09:29:05 -04:00
evdev.c	Input: struct device - replace bus_id with dev_name(), dev_set_name()	2008-10-30 09:29:05 -04:00
ff-core.c
ff-memless.c
fixp-arith.h
input-compat.c	Input: refactor evdev 32bit compat to be shareable with uinput	2008-10-27 22:03:42 -04:00
input-compat.h	Input: refactor evdev 32bit compat to be shareable with uinput	2008-10-27 22:03:42 -04:00
input-polldev.c
input.c	Input: struct device - replace bus_id with dev_name(), dev_set_name()	2008-10-30 09:29:05 -04:00
joydev.c	Input: struct device - replace bus_id with dev_name(), dev_set_name()	2008-10-30 09:29:05 -04:00
Kconfig
Makefile	Input: refactor evdev 32bit compat to be shareable with uinput	2008-10-27 22:03:42 -04:00
mousedev.c	Input: struct device - replace bus_id with dev_name(), dev_set_name()	2008-10-30 09:29:05 -04:00
xen-kbdfront.c	xen: clean up domain mode predicates	2008-08-20 12:40:07 +02:00