scroll *on* thumb not functional

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

Just to add - there was just a scroll related updated to gtk (libgtk-3-0 (3.3.18-0ubuntu1) to 3.3.18-0ubuntu2), but no change in the overlay scrollbar

Here is a video of the bug

Same exact issue here, precise 64 bit. Just like godhika's video.

There seems to be 2 variations here, some like godhika & bwat47 who apparently can't use the thumb at all

Others, like myself who can grab & move the thumb manually, just can't scroll on it.
It's possible the difference may be 32 bit vs. 64 bit
A number of the recent gtk3+ breaks in scrolling were different depending on Arch

Nah - just did a 64 bit install on same hardware with todays image - the thumb can be grabbed, just not scrolled on.

I can grab the thumb on an nvidia machine (Sony Vaio VGNAR520E), but not on an Intel machine (Dell Vostro V13) - maybe this is graphics related?

@ Manjul, the machine I have this issue on is indeed intel. (Intel ironlake graphics)

@ Doug. I'm on 64 bit, fully updates. I can't grab the thumb at all, it just disappears everytime I mouse over it.

can you grab it on unity2d or gnome shell? want to be sure it's not compiz related

At least here the thumb is grab-able on both unity & unity-2d. The only remaining issue is that scrolling on the thumb fails, nothing happens, thumb fades

There are some hardware (likely video card), where the thumb can't be grabbed at all, probably a separate issue.

Also this still exists though atm substituting 'scroll' with grab & move. Again this may be hardware related & only seen on touchpads
Bug 939149

Unity 2D displays the same issue here, thumb only appearing for a fraction of a second and impossible to grab. Intel graphics and touchpad.

+1 on gnome-shell.... Intel graphics on my X201.

It seems to be an important bug. I reproduced this few days ago then, with updates, it went fine and now is gone.

ok reproduced with touchpad

If that commit is accepted & new packages released it may be worth holding off marking this bug as 'fix released' till tested.

I can't say if it fixes the inability to acquire the thumb with a cursor as that's not an issue here. If a[[;ied to the current relase source it does not fix the inability to scroll 'on the thumb' (vs. 'with the thumb'

If it ends up that scolling on the thumb is gone, either in general or hardware specific it's not a big deal with all the other ways to scroll in a window, all of which do work here

(The last gtk3 source upgrade seemed to break scrolling, ect. both in general & it seems very hardware specific

@Andrea. I can't grab it in unity2d either, its showing the exact same behaviour I get in unity 3d. As soon as I mouse over the thumb it disappears on me.

Seems like there is ineed few similar bugs only effecting touchpads, after those gtk3 updates. (such as this bug https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/949414)

I'm now fairly certain this is actually this bug (https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/949414). The symtopms seem pretty much the same. It seems to be an issue with gtk not handling touchpad events properly

If I plug in my USB mouse I can use the overlay thumb just fine. Is everyone else experiencing this also using touchpads? Have you tried it with a mouse?

@bwat47 I think you may be right about it being touchpad specific. I came across this bug because my overlay thumbs were just barely functional (they could only be grabbed with some very careful aiming). As you suggested, I've now plugged in a USB mouse and they function as normal.

I tried plugging a USB mouse and the overlay scrollbars work well, so is a bug related to touchpad

dupe? - maybe, hopefully it is & when that's fixed this will be too. Noting though this affects both touchpads & a mouse & is independent of xserver-xorg-input-synaptics which does affect the other bug.

As somewhat expected the fix for 949414 did not address this bug

I had the same issue as Godhika's video demonstrates here - the thumb disappearing as soon as the mouse pointer gets near it.

Weirdly it seems to have resolved itself with the last batch of updates I applied just an hour or so ago.

So something in this lot from /var/log/apt/history.log resolved it (apologies for the formatting!)

Start-Date: 2012-03-20 13:55:25
Commandline: apt-get upgrade
Upgrade: libatk1.0-0:amd64 (2.3.93-1, 2.3.95-0ubuntu1), gir1.2-rb-3.0:amd64 (2.96-0ubuntu1, 2.96-0ubuntu3), libgtksourceview-3.0-0:amd64 (3.3.4-1ubuntu1, 3.3.5-0ubuntu1), console-setup:amd64 (1.70ubuntu3, 1.70ubuntu4), libcupsppdc1:amd64 (1.5.2-8, 1.5.2-8bzr1), python-pyatspi2:amd64 (2.3.5-0ubuntu2, 2.3.92-0ubuntu1), nautilus:amd64 (3.3.91-0ubuntu4, 3.3.92-0ubuntu1), libatspi2.0-0:amd64 (2.3.91-1, 2.3.92-0ubuntu1), libcupsimage2:amd64 (1.5.2-8, 1.5.2-8bzr1), rhythmbox-data:amd64 (2.96-0ubuntu1, 2.96-0ubuntu3), libcupscgi1:amd64 (1.5.2-8, 1.5.2-8bzr1), libglib2.0-data:amd64 (2.31.20-0ubuntu3, 2.31.22-0ubuntu1), at-spi2-core:amd64 (2.3.91-1, 2.3.92-0ubuntu1), libcupsdriver1:amd64 (1.5.2-8, 1.5.2-8bzr1), libatk1.0-data:amd64 (2.3.93-1, 2.3.95-0ubuntu1), glib-networking-common:amd64 (2.31.20-0ubuntu1, 2.31.22-1), fonts-opensymbol:amd64 (102.2+LibO3.5.0-2ubuntu1, 102.2+LibO3.5.1-1ubuntu1), libatk-adaptor:amd64 (2.3.91-1, 2.3.92-0ubuntu1), libcupsfilters1:amd64 (1.0.5-1, 1.0.6-0bzr1), rhythmbox:amd64 (2.96-0ubuntu1, 2.96-0ubuntu3), cups-client:amd64 (1.5.2-8, 1.5.2-8bzr1), ttf-opensymbol:amd64 (102.2+LibO3.5.0-2ubuntu1, 102.2+LibO3.5.1-1ubuntu1), librhythmbox-core5:amd64 (2.96-0ubuntu1, 2.96-0ubuntu3), gir1.2-gtk-3.0:amd64 (3.3.18-0ubuntu3, 3.3.18-0ubuntu4), libsoup-gnome2.4-1:amd64 (2.37.91-1, 2.37.92-1), libglib2.0-0:amd64 (2.31.20-0ubuntu3, 2.31.22-0ubuntu1), cups-ppdc:amd64 (1.5.2-8, 1.5.2-8bzr1), python-debtagshw:amd64 (1.9+git20120312, 1.9+git20120320), gir1.2-soup-2.4:amd64 (2.37.91-1, 2.37.92-1), gnome-icon-theme-symbolic:amd64 (3.3.91-1, 3.3.91.1-1), libgtk-3-bin:amd64 (3.3.18-0ubuntu3, 3.3.18-0ubuntu4), gnome-orca:amd64 (3.3.91-0ubuntu1, 3.3.92-0ubuntu1), cups-common:amd64 (1.5.2-8, 1.5.2-8bzr1), uno-libs3:amd64 (3.5.0-2ubuntu1, 3.5.1-1ubuntu1), libcups2:amd64 (1.5.2-8, 1.5.2-8bzr1), gir1.2-gtksource-3.0:amd64 (3.3.4-1ubuntu1, 3.3.5-0ubuntu1), libgtk-3-0:amd64 (3.3.18-0ubuntu3, 3.3.18-0ubuntu4), libgtksourceview-3.0-common:amd64 (3.3.4-1ubuntu1, 3.3.5-0ubuntu1), gir1.2-atspi-2.0:amd64 (2.3.91-1, 2.3.92-0ubuntu1), libglib2.0-bin:amd64 (2.31.20-0ubuntu3, 2.31.22-0ubuntu1), libgail-3-0:amd64 (3.3.18-0ubuntu3, 3.3.18-0ubuntu4), gir1.2-atk-1.0:amd64 (2.3.93-1, 2.3.95-0ubuntu1), cups:amd64 (1.5.2-8, 1.5.2-8bzr1), keyboard-configuration:amd64 (1.70ubuntu3, 1.70ubuntu4), nautilus-data:amd64 (3.3.91-0ubuntu4, 3.3.92-0ubuntu1), libreoffice-style-human:amd64 (3.5.0-2ubuntu1, 3.5.1-1ubuntu1), unity-greeter:amd64 (0.2.5-0ubuntu1, 0.2.5-0ubuntu2), cups-bsd:amd64 (1.5.2-8, 1.5.2-8bzr1), ure:amd64 (3.5.0-2ubuntu1, 3.5.1-1ubuntu1), libatk-adaptor-schemas:amd64 (2.3.91-1, 2.3.92-0ubuntu1), libreoffice-emailmerge:amd64 (3.5.0-2ubuntu1, 3.5.1-1ubuntu1), yelp-xsl:amd64 (3.3.3-0ubuntu1, 3.3.92-1), libcupsmime1:amd64 (1.5.2-8, 1.5.2-8bzr1), glib-networking-services:amd64 (...

Oh forgot to mention - 64bit install with Intel graphics + Synaptic pad.

Graham T (grahamt-manichostingservices)
Yes, that was this bug: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/949414. Fixed with today's updates. (Yay!)

@ Doug McMahon I think I see what you mean now. Trying to scroll (either with gesture on touchpad, or scrollwheel on mouse) with the cursor directly on top of the overlay scrollbar? In that case this effects me too, scrolling there does nothing. Luckily its not something one would run into too often though, as the overlay scrollbar takes such a small space.

the fix for bug #949414 fixed this for me too.
Now I can use overlay scrollbar with the touchpad without problems. tks

This bug was fixed in the package overlay-scrollbar - 0.2.16-0ubuntu1

---------------
overlay-scrollbar (0.2.16-0ubuntu1) precise; urgency=low

  * New upstream release.
    - Always use bg[SELECTED] for the bar in Gtk+ 2.
    - nautilus crashed with SIGSEGV in show_thumb_cb (LP: #907111)
    - Low visibility impaired users can't easily disable overlay
      scrollbar (LP: #934123)
    - scroll *on* thumb not functional (LP: #951121)
 -- Ken VanDine <email address hidden> Wed, 21 Mar 2012 11:41:13 -0400

Seems to be fixed. Thanks!