Starting to scroll is erratic with edge scrolling on touchpad or mouse scrollwheels

Status changed to 'Confirmed' because the bug affects multiple users.

Aha! It seems that I can reliably reproduce this. For me the steps are:

1) Plug in an external mouse
2) Move the external mouse
3) The start of the first set of scroll events from the touchpad is bad (scrolling in the opposite direction). After the initial bad events, scrolling works as normally until I move the external mouse again.

moving to the xserver, since both synaptics and evdev are affected.

ah, so it's not just me....
For me the behaviour is that if I repeatedly scroll down slowly sometimes the scroll will suddenly jump right back up.
I had wondered if it's something like moving the mouse at the same time as I was scrolling but I don't think so.

(Logitech M90 USB mouse)

Confirmed - and I find this very annoying because I can't play quakelive in linux anymore (weapons binded in mouseup and mousedown) as scroll just doesn't respond most of the time. Thought my mouse broke.. but works perfectly in Windows.

In case someone missed the freedesktop.org bug report:

"Appears to be a bad update of last.valuators[], resetting that value to 0
whenever the SD changes. As a result, the next value isn't on top of the
previous one but rather starting from 0, causing a bad in value. The jumps come
from that"

This completely f**ks up irssi too. The wheel just randomly scrolls in it's own and pastes random lines. Fix in sight?

If you're going to leave this for 12.04 please at least let users know so they can know not to upgrade. Considering amount of critical stuff that has been left unfixed for years, this would be fair.

Tarmo,

It sounds like you are trying to use Precise in a production environment. Precise is still an alpha, not even a beta yet. Rest assured, this will get handled. Please be patient.

This bug was fixed in the package xorg-server - 2:1.11.4-0ubuntu1

---------------
xorg-server (2:1.11.4-0ubuntu1) precise; urgency=low

  [ Chase Douglas ]
  * Allow for non-root config paths so xorg-gtest can be run without root
    - Add 225_non-root_config_paths.patch backported from upstream

  [ Alberto Milone]
  * debian/patches/226_fall_back_to_autoconfiguration.patch:
    - Fall back to autoconfiguration for graphics drivers in some cases
      instead of letting X fail when configuration files are available.

  [ Chase Douglas ]
  * Update to 1.11.99.902 input stack
  * Update to 1.11.4 for everything else
  * Drop input patches that have been merged upstream:
    - 220_dont_scale_indirect.patch
    - 221_pointer_motion_update_fix.patch
    - 222_touch_valuators_absolute.patch
    - 223_indirect_touch_x_y_valuators.patch
  * Add reviewed input patches that have not been merged upstream yet:
    - 600-Revert-dix-deduplicate-callers-of-DeliverDeviceEvent.patch
    - 601-Store-window-pointer-in-touch-listener-record.patch
    - 602-Factor-out-TouchEnd-generation-and-delivery.patch
    - 603-Export-TouchEventRejected-as-TouchRejected.patch
    - 604-Move-AllowTouch-to-dix-touch.c-and-rename-to-TouchAc.patch
    - 605-Check-for-proper-window-ID-when-processing-touch-all.patch
    - 606-Implement-early-touch-reject.patch
    - 607-Implement-touch-early-accept.patch
    - 608-dix-fix-an-out-of-memory-crash.patch
    - 609-Xi-handle-new-XIAllowEvents-request-in-inputproto-2..patch
    - 610-Fix-scrolling.patch (LP: #925785)
  * Bump deps on x11proto-input-dev to 2.1.99.6
 -- Chase Douglas <email address hidden> Fri, 10 Feb 2012 16:27:25 -0800

Confirm - that fixed it for me (on both my machines) - thanks! That was a really frustrating bug in use!

If this is supposed to be fixed in Precise already, it is not. The scroll still responds only randomly, especially it doesn't respond at all if you press keyboard at the same time. Works perfectly in 11.10.

Alexander,

It sounds like you have "Disable touchpad while typing" checked in your mouse and touchpad settings. That would explain why the scrolling doesn't occur if when you type on the keyboard.

If that does not resolve your issues, please open a new bug.

Thanks!

After little pinning down what's going on, actually the bug I'm experiencing is in the DGA (libxxf86dga1) library.

Scrolling in the browser works, through any game using DGA for input it doesn't, then again I experimented with Warsow by adding mouse support to read it directly from evdev and this didn't have scrolling problems either. I'll try to pinpoint this down better and and file a new bug.