Difference between revisions of "Problem with checking battery status"

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(Jerky mouse on ThinkPad R31)
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R31 laptops have a problem were checking the battery status causes the mouse to jerk around the screen clicking on things.  Also sometimes repeating keypresses are generated.
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R31 laptops have a problem where anytime ACPI or APM events are polled (e.g. checking battery status), causes the mouse to jerk around the screen clicking on things.  Also sometimes repeating keypresses are generated.
  
 
===Causes===
 
===Causes===
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Apparently a BIOS bug.  Seems to happen with both ACPI or APM.
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Anomaly in the way the kernel driver handles the i8042 keyboard/mouse controller in the R31.
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===Workarounds===
 
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Don't query the battery.  Remove any battery applets from your panel.
 
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===Undiagnosed problems===
 
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The problem seems to have returned to my system every since I upgraded to GNOME 2.12 and starting running hal/dbus.  Perhaps one of those components is querying my battery. If anyway one has any suggestions, please post!
 
  
 
===Related Symptoms===
 
===Related Symptoms===
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  psmouse.c: TrackPoint at isa0060/serio4/input0 lost synchronization, throwing 2 bytes away.
 
  psmouse.c: TrackPoint at isa0060/serio4/input0 lost synchronization, throwing 2 bytes away.
 
  psmouse.c: TrackPoint at isa0060/serio4/input0 lost synchronization, throwing 2 bytes away.
 
  psmouse.c: TrackPoint at isa0060/serio4/input0 lost synchronization, throwing 2 bytes away.
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===Workarounds===
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Don't query the battery.  Remove any battery applets from your panel.
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===Possible Solution===
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Use the following kernel parameter, without quotes, at boot: "i8042.nomux=1". Add this to your "append=" line in lilo.conf or append it to the kernel line in the menu.lst of your grub configuration.
  
 
===References===
 
===References===
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* http://www.linuxquestions.org/questions/archive/25/2005/04/2/308437
 
* http://www.linuxquestions.org/questions/archive/25/2005/04/2/308437
 
* http://lists.debian.org/debian-user/2003/12/msg03632.html
 
* http://lists.debian.org/debian-user/2003/12/msg03632.html
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* http://www.systura.com/linux/thinkpadr31.php
  
 
[[Category:R31]]
 
[[Category:R31]]

Revision as of 09:18, 7 March 2006

R31 laptops have a problem where anytime ACPI or APM events are polled (e.g. checking battery status), causes the mouse to jerk around the screen clicking on things. Also sometimes repeating keypresses are generated.

Causes

Anomaly in the way the kernel driver handles the i8042 keyboard/mouse controller in the R31.

Related Symptoms

These messages in dmesg seem to be related: 

psmouse.c: TrackPoint at isa0060/serio4/input0 lost synchronization, throwing 2 bytes away.
psmouse.c: TrackPoint at isa0060/serio4/input0 lost synchronization, throwing 2 bytes away.

Workarounds

Don't query the battery. Remove any battery applets from your panel.

Possible Solution

Use the following kernel parameter, without quotes, at boot: "i8042.nomux=1". Add this to your "append=" line in lilo.conf or append it to the kernel line in the menu.lst of your grub configuration.

References

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