Messages in this thread | | | From | Dmitry Torokhov <> | Subject | Re: Synaptics problems in -mm1 | Date | Sat, 27 Dec 2003 19:45:44 -0500 |
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On Saturday 27 December 2003 07:00 pm, Andrew Morton wrote: > Tomas Szepe <szepe@pinerecords.com> wrote: > > > I think it ACPI PM timer if you have it activated - I am having > > > problems with it myself but didn't have time to look closer. > > > Could you try booting with clock=tsc or clock=pit and see if it > > > fixes the touchpad. > > > > clock=tsc appears to fix the problem. > > clock=pit no change. > > So we've established that it is an interaction between the input code, > the ACPI PM time code and cpufreq, yes? That's a bit of a witches > brew. > > Does anyone know what aspect of the ACPI PM timer behaviour could cause > this?
From my limited experience ACPI PM timer just gets the time wrong. At least psmouse times out much quicker than 4 seconds when resetting the touchpad which causes many problems.
Looking at the PM timer was on my TODO list ever since it was included in -mm... I tried installing cpufreq handler to do the same adjustments for loops_per_jiffy as in timer_pit but I was still getting pretty much the same result - time goes too quickly.
Dmitry
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