Frequent uncontrollable mouse action. The action is simply moving the mouse from the lower right in an upper left direction. The amount of movement can be very tiny. Erratic action is increased with the speed of the mouse movement. With the web browser, the action is to cause it to backup to previous web pages, and it sometimes goes several pages back. In switching workspaces, it causes a return to the previous workspace with the slightest movement. In dealing with open windows, it causes a return to the previous window. I first noticed this upon installing a fresh version of FC4. This was fresh installation, not an update. Afterwards, it seemed to get worse. Upon later updating software and a new kernel on a FC3 system, I also noticed the same action. This action is completely repeatable. In fact it happens every time unless I click on the screen before making any movements or by moving the cursor very slowly. Clicking on the screen is a temporary solution since if I am moving the cursor completely across the screen, it will start the same action halfway across unless I click on the screen a 2nd time.
Have also noticed that sometimes the mouse will act as if the left mouse button has been pressed and is being held down. There is no way to release it except to close the current application. I first noticed this while using gThumb Image Viewer. It does not happen all of the time, but it does repeat often.
i see this on my toshiba satellite 2400-s251 as well. the pointer scrolls up and to the left constantly. i've worked around the problem for now by setting the psmouse.proto=imps in the grub.conf.
I just tried adding psmouse.proto=imps to the grub.conf file and then re-booted. It did not help.
I see the same on a Dell latitude D505 with a kernel-2.6.12-1.1398_FC4. I have in dmesg: alps.c: Enabling hardware tapping input: PS/2 Mouse on isa0060/serio1 input: AlpsPS/2 ALPS GlidePoint on isa0060/serio1
*** This bug has been marked as a duplicate of 164378 ***