Re: 2.6.11 acpi battery state readout as source of keyboard/touchpad troubles

[Pavel Machek <pavel@suse.cz>]

Hi!

> In traceing the source of my sporadic synaptics touchpad troubles
> 
> psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
> psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
> psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
> psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
> psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
> psmouse.c: TouchPad at isa0060/serio4/input0 - driver resynched.
> 
> and keyboard troubles (sporadically lost key up/down events) on an Acer
> Aspire 1520 (x86_64, latest bios v1.09) I did enable the
> report_lost_ticks option which did spit out stuff like the following at
> regular intervals:
> 
> time.c: Lost 17 timer tick(s)! rip handle_IRQ_event+0x20/0x60)
> time.c: Lost 8 timer tick(s)! rip handle_IRQ_event+0x20/0x60)
> time.c: Lost 19 timer tick(s)! rip handle_IRQ_event+0x20/0x60)
> time.c: Lost 8 timer tick(s)! rip handle_IRQ_event+0x20/0x60)
> time.c: Lost 18 timer tick(s)! rip handle_IRQ_event+0x20/0x60)
> time.c: Lost 8 timer tick(s)! rip handle_IRQ_event+0x20/0x60)
> 
> This looked suspiciously like it happended when the the kde laptop
> applet polled the battery status. So I did terminate the applet.
> 
> The result was no more lost ticks, no lost keyboard events and no more
> lost touchpad sync.
> 
> To verify ACPI battery data as the source of trouble i did a simple
> 
> cat /proc/acpi/battery/BAT0/state
...

CONFIG_ACPI_DEBUG enabled by chance?
								Pavel
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