Version: (using KDE KDE 3.5.0) Installed from: Ubuntu Packages OS: Linux When scrolling in a topic with the mousewheel (it doesn't seem to apear when using the scrollbar) in the german Kubuntu forum the page kind of hangs and then continues again. Try it out at this page: http://www.kubuntu.de/forum/forum.php?req=thread&id=773. It might be related to bug 52801 but I don't think so because the fact that it only apears when scrolling with the mousewheel. Cheers, Matej

I cannot reproduce. Can you kill the hung Konqueror process with SIGABRT and paste the backtrace here?

Created an attachment (id=14010) [details] The page when scrolling

Created an attachment (id=14011) [details] The page how it should be

It doesn't really hang, it just gets stuck for a second and then continues again. Or do I get you wrong and you mean something else? I'm attached 2 pictures. The first one is when I scroll and the second one is how it actually should be. BTW: I also noticed that when switching from another tab to a Kubuntu.de tab it is really slow.

I found a really good example: http://sagefire.org/C1009907506/E1311212715/index.html

SVN commit 542397 by carewolf: Only repaint the expossed area when scrolling. Fixing local mistakes makes our perfomance less dependent on fully optimized drivers. BUG: 125580 BUG: 118806 M +9 -0 render_box.cpp --- branches/KDE/3.5/kdelibs/khtml/rendering/render_box.cpp #542396:542397 @@ -529,7 +529,16 @@ sy+=b.y()-cy; cx=b.x();cy=b.y();cw=b.width();ch=b.height(); } + // restrict painting to repaint-clip + if (cy < clipy) { + ch -= (clipy - cy); + sy += (clipy - cy); + cy = clipy; + } + ch = kMin(ch, cliph); +// kdDebug() << " clipy, cliph: " << clipy << ", " << cliph << endl; +// kdDebug() << " drawTiledPixmap(" << cx << ", " << cy << ", " << cw << ", " << ch << ", " << sx << ", " << sy << ")" << endl; if (cw>0 && ch>0) p->drawTiledPixmap(cx, cy, cw, ch, bg->tiled_pixmap(c), sx, sy);