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Re: port-sparc/45314: Spurious mouse button events under X11 on a SparcStation 2
The following reply was made to PR port-sparc/45314; it has been noted by GNATS.
From: christos%zoulas.com@localhost (Christos Zoulas)
Subject: Re: port-sparc/45314: Spurious mouse button events under X11 on a
Date: Tue, 30 Aug 2011 12:08:40 -0400
On Aug 30, 3:20pm, Georg.Brein%unibas.ch@localhost
-- Subject: port-sparc/45314: Spurious mouse button events under X11 on a Spa
| >Number: 45314
| >Category: port-sparc
| >Synopsis: Spurious mouse button events under X11 on a SparcStation 2
| >Confidential: no
| >Severity: serious
| >Priority: medium
| >Responsible: port-sparc-maintainer
| >State: open
| >Class: sw-bug
| >Submitter-Id: net
| >Arrival-Date: Tue Aug 30 15:20:00 +0000 2011
| >Originator: Georg Brein
| >Release: NetBSD 5.1 sparc
| University of Basel/Switzerland
| NetBSD se-zulu.psycho.unibas.ch 5.1 NetBSD 5.1 (GENERIC) #0: Sat Nov 6
18:44:40 UTC 2010
| SparcStation 2, firmware rev. 2.9
| Quickly moving the mouse in wide cycles under X11 (without actually pressing
one of the mouse buttons) seems to generate spurious mouse button events; this
is quite annoying because it sometimes leads to unwanted copy-and-pasting
(which is especially annoying with xterm windows, even more so if you are
logged in as root...). The spurious mouse button events seem to happen more
often if the mouse cursor crosses window borders during the movement (causing
twm to redraw the window border).
| I experienced the problem both with a type 4 optical mouse attached to a
type 4 keyboard and a type 5 mechanical mouse attached to a type 5 keyboard.
There are no such problems with the same hardware under Solaris 2.5.1.
| My (uninformed) guess is that the SparcStation 2 (at least under NetBSD) is
not fast enough to cope with the data from the mouse (I'm using a CG3 frame
| Boot a generic kernel on a SparcStation 2, activate xdm, log in, open a few
xterm windows and type "ls /dev" in all of them (this is just to fill the xterm
screens with harmless text). Then start to move the mouse quickly in wide
circles on the screen (crossing window borders) without pressing a mouse button
and watch the spurious copy-and-pasting (inside the xterm windows) or the twm
menus flashing briefly (on the root window).
| Move your mouse more gently :-)
I think this is caused by the versioned ioctls for the mouse that were
necessary for the 64 bit time syscalls.
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