Created attachment 129742 [details]
I have Fedora 25 running on my Dell Latitude E5570 laptop and trackpoint is soooo sensitive. Just a little touch moves the cursor to another end of the screen, makes it absolutely unusable. I'm attached some logs from libinput-debug-events, hope it can helps.
what's the output from udevadm info /sys/class/input/event5 (adjusted for the event node if need be)
Output for udevadm info /sys/class/input/event5:
have a look at this file:
looks like you need an entry with a CONST_ACCEL of less than 1 to slow the thing down a bit. at the top of the file are instructions on how to install a custom hwdb entry for testing
I'm tried that but it's doesn't work.
My output for/sys/class/dmi/id/modalias
So, I'm created a local rule
After that I'm update hwdb and execute udevadm trigger /dev/input/event*
But nothing changed. No matter what value I'm set to CONST_ACCEL.
does the property show up?
If it shows up in udev, does libinput-debug-events --verbose show the const accel value?
Yes and yes. udevamd test produce this output
And libinput-debug-events --verbose
input device 'AlpsPS/2 ALPS DualPoint Stick', /dev/input/event5 is tagged by udev as: Mouse Pointingstick
Device 'AlpsPS/2 ALPS DualPoint Stick' set to const accel 0.50
But nothing changed in pointstick behavior
strange. You restarted X/Wayland, I take it?
Damn. I've never restart wayland after changes, only hwdb update. Actually, restarting a wayland works. Thank you so much!
I also have a Dell laptop with an ALPS dual pointing stick and had the same issue that the stick was much too fast. However, I am unable to achieve acceptable results with all the different knobs that are available. If I tune down acceleration, I am able to do detailed pointing, but the stick is generally so slow, that it takes ages to cross the screen. On the other hand, if I increase the acceleration, even the slightest movement of the stick makes it jump significantly on the screen so that I am unable to do detailed selections.
Setting POINTINGSTICK_CONST_ACCEL has an effect but as described, not the desired. Is there anything else that can be tuned to get this going?
No, there's no other setting exposed right now, sorry. It's a long-standing issue with libinput but no-one has found the time or motivation to work on it yet.
This fix doesn't work on my Dell E5570, including restarting Xorg. :-(
Running Linux Mint 18.1 with Cinnamon. If I stick to an old Kernel, 4.4.0-53 generic, then the mouse is fine. But if I use any later Kernel, including various versions of 4.8 and 4.10, then the mouse pointer-stick has uncontrollable acceleration. The touch pad is fine.
is the property applied in both cases?
yes, if you mean with both kernels. Yes.
... But in fact the lower 4.4 kernel doesn't need the hwdb setting. The pointer-stick/trackpoint acceleration is fine, out of the box.
I think I'm going to close this this as dupe of bug 91369 because it ends up being the same issue. That bug has a test branch in bug 91369#c48, please give that one a try.
*** This bug has been marked as a duplicate of bug 91369 ***