<div dir="ltr"><div><div><div><div><div><div><div><div>The easisest way to reproduce the problem is:<br></div>- run gt3-demo (from package gtk-3-examples, any version >= 3.8 will do, checked with 3.8.4 and 3.10.2)<br></div>
- bring up example Text Widget/Multiple Views <br></div>- using a mouse with scrollwheel, turn the scrollwheel in one of its text windows<br></div>- no scrolling occurs<br><br></div>(For fun, try holding down the left mouse button while using the scrollwheel: scolling works; this is probably related to the workaround "turn off Two Finger Scrolling".)<br>
<br></div>If you try the above under GDK_DEBUG=eventsyou can see that using the scrollwheel results in a SCROLL_SMOOTH event, but with zero deltas.<br><br></div>See also <a href="https://bugs.launchpad.net/compiz/+bug/1200829">https://bugs.launchpad.net/compiz/+bug/1200829</a><br>
</div><div>At first this seems unrelated (compiz: WTF?), but gets down to the real culprit at the end. <br>I can confirm that Chris Townsend's fix at<br><a href="https://launchpadlibrarian.net/153419670/gtk%2B3.0_3.8.4-0ubuntu3_3.8.4-0ubuntu3test1.diff.gz">https://launchpadlibrarian.net/153419670/gtk%2B3.0_3.8.4-0ubuntu3_3.8.4-0ubuntu3test1.diff.gz</a><br>
</div><div>works for me in the above scenario, also for affected applications like gedit and gnote.<br><br></div><div>Cheers, Roderich<br></div></div>