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Linux - Laptop and Netbook Having a problem installing or configuring Linux on your laptop? Need help running Linux on your netbook? This forum is for you. This forum is for any topics relating to Linux and either traditional laptops or netbooks (such as the Asus EEE PC, Everex CloudBook or MSI Wind).

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Old 04-23-2024, 02:37 PM   #1
taspen
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Registered: Apr 2024
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Floating Trackpoint on thinkpad


I have a Gen3 T14 ThinkPad that I love, but I'm facing one annoying issue. The TrackPoint is constantly recalibrating incorrectly, causing the cursor to move on its own. It takes a few seconds to recalibrate, but during this time, the mouse becomes unusable. It does this when the trackpoint is held for about 5 seconds in one direction. This issue makes playing games really difficult. I did some digging and found a sysfs entry at /sys/devices/platform/i8042/serio1. The directory has entries like bind_mode, description, driver, drvctl, firmware_id, id, input, modalias, power, press_to_select, protocol, rate, resetafter, resolution, resync_time, sensitivity, subsystem, uevent. I'm able to change the sensitivity value and make a noticeable change to the TrackPoint behavior, so I know I'm in the right place in sysfs. I've tried setting resetafter and resync_time to a ton of different values from 0 to 100,000, and it doesn't seem to make any difference. Is there another way to change the recalibration time parameters? Why doesn't changing the resync_time and resetafter seem to work? What I'd really like is to turn off the recalibration altogether, but I don't know if that's possible.

My setup:

Gen3 Lenovo ThinkPad T14, AMD Ryzen Pro 7 6850U Debian Sid with Gnome on Wayland kernel 6.7.9

I've tried changing the values in the sysfs entry to values from 0 - 255 and up to 100000 just incase it was in milli or micro seconds for resetafter and resync_time. The default value for resetafter is 5. It takes about 5 seconds until it resets happens and I'm guessing that is the value that I can't seem to effect. I've also tried setting the values via udev rules as well.
 
Old 04-23-2024, 03:48 PM   #2
taspen
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SOLVED

Solved

So doing some more digging I found that those defualt values where being loaded when the psmouse kernel module was being loaded. By running modinfo psmouse I found that setting the values for resync\_time and resetafter to 0 would disable that feature. So I made a file in /etc/modprobe.d/psmouse.conf and inculuding options psmouse resync_after=0 resetafter=0 then just reload the kernel module. modprobe -r psmouse modprobe psmouse

Last edited by taspen; 04-23-2024 at 03:50 PM.
 
1 members found this post helpful.
Old 04-24-2024, 03:00 AM   #3
pan64
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in that case you might want to mark the thread solved.
 
  


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