Re: Spurious double-clicks in 2.6.0

[Vojtech Pavlik <vojtech@suse.cz>]

On Mon, Dec 29, 2003 at 11:54:14PM -0600, Rob Landley wrote:
> I recently had the opportunity to compare 2.6 and 2.4 on my thinkpad, and 
> although most things are greatly improved in 2.6, one thing stands out.
> 
> When I click on things in 2.6, about 1% of the time it double-clicks instead.  
> (Clicking on a titlebar to raise the window causes it to roll up instead, 
> clicking on a scrollbar causes it to page down twice instead of once, etc.  
> I'm always afraid that pulling up the top left window menu (to move it to 
> another desktop, make it always on top, etc) will kill the window instead...)
> 
> This just doesn't happen under 2.4: I used the default kernel of Fedora Core 1 
> for several days after a recent reinstall before putting 2.6 back on the box.  
> But the input core doesn't seem to have this detail yet.
> 
> In 2.4 there seems to be some minimum time required between clicks to count as 
> a double-click, which nicely filters out this kind of suprious electrical 
> contact bounce thing.  (This makes sense: a human being simply CAN'T click 
> twice within 1/20th of a second.  The mouse driver should drop a second click 
> that comes faster than that: it's keybounce from the previous click.)

Reconfigure X only to use one mouse source (either /dev/psaux or
/dev/input/mice, not both). Since in 2.6 the mouse inputs are already
mixed in the kernel for these two devices, X then gets all the data
twice, resulting in random doubleclicks.

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR