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<blockquote data-quote="Thymen" data-source="post: 1487940" data-attributes="member: 243742">Boy, was I frustrated today......turned on my mac, and as soon as the login screen appeared my mouse pointer behaved very erratically. No matter what I did, it always jumped to and fro, and put itself mostly in the right lower portion of the screen. If I moved it to the centre, it jumped back.Tabbed to my login, and entered my password. On the desktop, same behaviour. So I logged in to my trustworthy, always working, never-have-problems Windows box ( ;P ) to google. Found out that there are quite some users having or having had the same problem. Often related to other connected hardware, like Firewire drives.I connected/disconnected all peripherals, and the problem dis-appeared. Then, one by one, I reconnected. Found out that the USB port to the USB hub gave the problem. So connected/disconnected each of the 7 or so usb devices, and I finally found out it was the Wacom tablet that was causing it.Was about to scrap it, until I noticed my wife had put the stylus, in it's holder, on top of the tablet.. causing the tablet to constantly negotiate mouse position with the stylus.. <img src="/mac_images/images/smilies/Mischievous.png"&nbsp; class="smilie" loading="lazy" alt=":Mischievous:" title="Mischievous&nbsp; &nbsp; :Mischievous:" data-shortname=":Mischievous:" />All in all, took me about an hour to figure it out...Thymen.</blockquote>

[QUOTE="Thymen, post: 1487940, member: 243742"] Boy, was I frustrated today...... turned on my mac, and as soon as the login screen appeared my mouse pointer behaved very erratically. No matter what I did, it always jumped to and fro, and put itself mostly in the right lower portion of the screen. If I moved it to the centre, it jumped back. Tabbed to my login, and entered my password. On the desktop, same behaviour. So I logged in to my trustworthy, always working, never-have-problems Windows box ( ;P ) to google. Found out that there are quite some users having or having had the same problem. Often related to other connected hardware, like Firewire drives. I connected/disconnected all peripherals, and the problem dis-appeared. Then, one by one, I reconnected. Found out that the USB port to the USB hub gave the problem. So connected/disconnected each of the 7 or so usb devices, and I finally found out it was the Wacom tablet that was causing it. Was about to scrap it, until I noticed my wife had put the stylus, in it's holder, on top of the tablet.. causing the tablet to constantly negotiate mouse position with the stylus.. :Mischievous: All in all, took me about an hour to figure it out... Thymen. [/QUOTE]

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