On Sat, Feb 09, 2002 at 01:10:16PM +1100, Simon Wong wrote: <snippage> > The mouse itself works fine and all 3 buttons work okay but the > scroll-wheel does nothing. > > I have also tried to use the IMPS/2 mouse driver but that results in an > unusuable mouse (pointer jumps all over the place when I move the > mouse). > > I am using X 4.1.0-13. > > Has anyone got any suggestions as to what else to try? The way I understand it, when first powered up all ps/2-type pointing devices act as if they are just basic ps/2 mice (for compatibilty reasons). It is then the job of a special mouse driver to initialize the mouse as an intellimouse, etc. in order to make the extended features available. The problem with this under Linux is usually gpm. It's possible for two programs to both share a ps/2 mouse device, but the first one to open it will be the only one to initialize it -- this would be gpm if you are running it. So if gpm thinks your mouse is a plain ps/2, then a plain ps/2 it will be. When X tries to treat it like an intellimouse, it will enterpret things all wrong, and your pointer will jump all over the place (your mouse has an identity problem :-) Some people simply turn off gpm to prevent this, but I *like* gpm -- it's nice to be able to click on links when running links(1) on the console. Setting both gpm.conf and X to agree on the mouse type should fix this (gpmconfig is your friend). But I've had better luck (with intellimice and clones) setting X to use /dev/gpmdata as the pointer device. I use gpm's 'raw' repeater type, and the IMPS/2 X mouse driver (*not* the IntelliMouse driver, which is different for I don't know why.) Set up this way, the mouse pointer doesn't 'skip' under X when the mouse is moved fast. -- Joseph Fannin email@example.com "Bull in pure form is rare; there is usually some contamination by data." -- William Graves Perry Jr.
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