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Serial Mouse behaving erratically

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I've just installed Mandrake 7.1 and my serial mouse (attached to COM1/3f8 IRQ4 on an ISA serial card) responds erratically when I move it. The pointer jumps all over the screen whenever I move the mouse. I tried booting to a DOS boot disk and loading a DOS mouse driver and the mouse responded correctly with no jumpiness. It's a Radio Shack serial mouse (Microsoft-compatible). I've tried setting the mouse up as MS, Microsoft, and generic serial using MOUSECONFIG, but none of these changes seem to help. Any ideas?
Also, do I need to reboot the machine or just X after changing something in MOUSECONFIG? I've been rebooting the whole machine after each change to be sure. Thanks for all help!

18 replies

by dmiles

Run the virus scan to make sure it is not a virus.
2)Open the control panel,double-click on the system icon,the click the device manager tab,locate the mouse and click plus ,highlight the mouse and click properties,if you have two mouse devices delete on and use prefered mouse.
After installing any device it is best to reboot for settings to take affect.

by fe

I assume this is Win9x. Go to the System applet in the control panel. Click on the Device manager tab. Double click on COM1 to open the properties dialog.

First, check the Resources tab to verify that there are no conflicts. If there are, you'll have to resolve them.

If no conflicts, click on Port settings. Try clicking on restore defaults. This works for most devices.
If this doesn't improve performance, click on advanced and move the sliders all the way to the left.

Best wishes.

by bill cassada

You most likely have a COM conflict...two devices trying to use the same COM port. Try moving the mouse to a different COM port and your problems should disappear. Make sure you don't move it to a port that is being used by another device though.Good luck!

by bjackey13

Checked COM ports, no conflict. If there was a conflict the mouse would not respond at all, or at least not while the conflicting device was being accessed.

by magistratemike

I've had this problem before, but unfortunatly our situations are a little different. I run a complete Compaq/NT network and with one batch of labtops the mouses did the same thing. I fixed this by downloading a patch from Compaq and the problem cleared up instantly. The moral to this story is maybe there is a patch somewhere for your combanation of products GL

by bjackey13

Unfortunately, I checked Mandrake's site, but there is no patch/modification for a generic serial mouse :(

by bill cassada

Wrong!! You can have two devices....especially a modem....trying to use the same port which will cause problems. Granted modems are not usually on COM1, but this behavior is definitely typical of a COM conflict. I would still try relocating the mouse to another COM port and see what happens. Check to see if the old driver is still trying to load...this would also cause problems. My in-laws have the same mouse on Win98SE and have no problems with it.

by bjackey13

Changed mouse to COM2, no conflicts, still had same problem. My system has no modem, soundcard, or any other peripheral besides a NIC, an AGP graphics card, and the serial card. Again, this IS a LINUX system, not Windows.

by earnest

Not familiar with Linux but I suppose it is still a multitasking system. Look for a program running in the backgroud. I have had this problem where the background program is running at a higher priority. The mouse has a low priority so as the mouse moves and the background program gets cpu cycles the pointer appears to jump around the screen and acts erractically. Good Luck.

by bjackey13

Mouse problem occurs before I even log in to the OS, so there are no other programs running.

by pvp

I'm not going to solve your mouse problem, but if you think there's nothing running because you haven't logged in, you need a clue about linux! After logging in, do "man ps" and look for options to give you the most details possible (the options vary with flavors of unix/linux, so I can't give you the options here). Then do "ps -[options] | more" and ignore whatever shows up under your userid (which should be ps, more, and some flavor of shell: sh, csh, ksh, bash, etc.). You'll find a ton ofthings started without you!

by bjackey13

As an NT Admin, I'm quite aware of background programs. However, on a straight install without any specified services turned on, I find it hard to believe that there would be enough processes running to make it impossible to use a mouse.

by vn

Right off the bat....do yourself a favor and change out the mouse. If you already did that as a TEST....and still see the same behaivor, you know it's not your mouse. I have seen mice with SWITCHES on them... MS COMPATABLE and PC COMPATIBLE. You may have one or the other.

The other thing to look at is to see if you have your ISA plugged next to the PCI slot....if you have PCI. One PCI shares the ENTIRE ISA bus. Move your ISA to a different slot.

If all that fails... get another SERIAL card...or even better a PS/2 card that you can change out on. Try these three things before anything else.

To trouble shoot your Linux....grab another drive and load DOS on it...and load the dos level drivers to see if your mouse continues thisbehaivor.

Latez-

by vn

wow...to think...all this work for a 7 dollar item. Think about it!

by bjackey13

The mouse is fine. I installed Suse and the problem resolved itself, although I still get it if I run Mandrake or Redhat. Guess I'll get a real mobo :P

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