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From: Jonathan Fosburgh <jonathan@fosburgh.org>
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Date: Tue, 8 Mar 2005 10:49:53 -0600
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Subject: Re: usb/77604: Sluggish Logitch LX700 USB Mouse
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After looking through other bug reports I have added options USB_DEBUG to m=
y=20
kernel and set the debug level on my ums device to 11.  I don't know what t=
he=20
units are, but it does not appear that X or Y access motion is actually=20
reflected by the pointer until approximately '5' whatevers have been=20
accumulated.  That is I can gently nudge the mouse and watch debug info of=
=20
the form:

Mar  8 10:44:42 jef-nt kernel: ums_intr: x:-2 y:2 z:0 t:0 buttons:0x0
Mar  8 10:44:42 jef-nt kernel: ums_intr: sc=3D0xc191b800 status=3D13
Mar  8 10:44:42 jef-nt kernel: ums_intr: data =3D 01 00 00 02 00 00
Mar  8 10:44:42 jef-nt kernel: ums_intr: status=3D13

scroll by, but the mouse does not move until the number next to x: or y: ha=
s=20
reached approx. 5.  If I move the mouse slowly I get something approaching=
=20
smooth movement, though it is still feeling a little sluggish.  Rapid motio=
n=20
might cause the numbers next to x: or y: to move by the tens:

Mar  8 10:44:42 jef-nt kernel: ums_intr: x:-85 y:101 z:0 t:0 buttons:0x0

and the mouse jumps across large portions of the screen. I haven't checked =
Z=20
axis and buttons, but I would imagine I come across the same thing.  HTH.

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