Red Hat Bugzilla – Bug 80309
gpm causes X PS/2 mouse erratic behavior
Last modified: 2007-04-18 12:49:15 EDT
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Description of problem:
When I enable gpm, my PS/2 mouse goes somewhat crazy in X. When I touch my PS/2
touchpad the pointer sometimes jumps around and clicks uncontrollably. When I
disable gpm the touchpad returns to normal behavior. It worked fine in Red Hat
7.3 and 8.0.
I configured my mouse as Generic 2 button PS/2 and Generic 3 button PS/2, same
results. Same results if either gpm or X started and ended first. If you
disable gpm, mouse works properly again in X.
Sony Vaio FXA-36 laptop
Athlon Palomino 1GHz
VIA KT133A chipset
2 button PS/2 Synaptics touchpad
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Enable gpm
2. Use touchpad in X
Erratic jumping and clicking behavior of mouse pointer.
It should follow my commands.
Reproduced this on a completely unrelated VA Linux 1000 dual Pentium3 server.
I experienced the same erratic jumpy mouse movement during Anaconda's X &
monitor setup during installation of Phoebe.
*** Bug 80406 has been marked as a duplicate of this bug. ***
*** Bug 80614 has been marked as a duplicate of this bug. ***
I also experienced some jumpy pointer during the Phoebe installer.
I'm seeing similar trouble with Rawhide XFree86-22.214.171.124-20021230.0, and
gpm-1.19.3-24. I wasn't seeing this behavior with XFree86 from Phoebe.
These problems occur when both gpm and xfree86 are configured for a PS/2
mouse and gpm is active. The result is that really jumpy sometimes frozen
mouse behaviour as described below.
After configuring the system so gpm wouldn't start in run levels 2 and 3,
I wasn't able to recreate the problem after rebooting and returning to X.
Rebooting with a usb mouse added caused kudzu to reconfigure
/etc/sysconfig/mouse and /etc/X11/XF86Config for usb. In this case, I also
had normal smooth mouse behaviour. Switching these two files around to
have both mice active at once caused the bad behaviour in X if I had gpm
running, started something like find /, and tried to wiggle the ps/2 mouse
while dragging a gnome-terminal by its titlebar. Repeating the same steps
with the usb mouse didn't seem to cause trouble.
Finally, with gpm configured to only deal with the usb mouse, and
XF86Config configured for both mice, I wasn't able to reproduce the
*** Bug 81540 has been marked as a duplicate of this bug. ***
Bug in how we were configuring gpm.
gpm-1.19.13-25 changed so the behavior won't happen with how we configure it.