Version: (using KDE 4.4.2) Installed from: Fedora RPMs I am going to quote Robert Szalai here which posted to KDE mailing list at Fedora. [quote] I've observed that when some popups and most notably the kickoff menu appear on screen it does try to slide in. The problem is that it looks like a landslide, the background under the menu also slides and makes a very distracting effect. It is also very non-smooth. [/end of quote] He is using a Radeon rv730 (HD4670) on Fedora 13 fully updated using the mesa 7.8 drivers. I have seen this problem myself too on a few different configurations. Here are a few configurations; Fedora 12 (nVidia 9800 GT and a FX 5200 / proprietary nvidia drivers) Fedora 13 (nVidia 9800 GT / proprietary drivers) Fedora 12 with some sort of onboard ATI card and the Mesa experimental drivers OpenSUSE 11.3 (onboard nVidia card with OpenSUSE's nVidia drivers?). All the machines from my list had composting enabled and are running KDE 4.4.2.
I forgot to mention a completely different person / configuration; a 9800GTX (x86_64), latest proprietary drivers and also KDE 4.4.2 (from the fedora kde unstable repository's).
It also happens on my macbook pro with radeon X1600 (r500), open source drivers.
I assume these observations are with desktop effects on?
Indeed, with desktop effects on. I assume the offending code is somewhere here: http://websvn.kde.org/trunk/KDE/kdebase/workspace/kwin/effects/slidingpopups/slidingpopups.cpp?view=markup If I disable it in the All Effects section in systemsettings, the effect disappears, hence the guess about what code is affected. I cannot see any reference to OpenGL, that must be the reason why it is driver agonistic. I've emailed the author with a reference to this bug report.
it's unrelated to the sliding popups effect. That issue existed already in 4.0 - kickoff is just too slow in rendering. The famous video garbage bug was also most present in opening kickoff.
*** This bug has been marked as a duplicate of bug 208588 ***
FWIW, the CPU and GPU combination seems irrelevant. I'm seeing it on ION based netbook w/ nouveau and Xeon machines with GF9800 and GTX470 cards using the latest proprietary driver.s - Gilboa
Just to reiterate: it is a different bug from https://bugs.kde.org/show_bug.cgi?id=208588
(In reply to comment #5) > it's unrelated to the sliding popups effect. That issue existed already in 4.0 > - kickoff is just too slow in rendering. The famous video garbage bug was also > most present in opening kickoff. It is not about being slow and there is no video garbage. The effect is when kickoff tries to slides in, it cuts out the background and that cut out piece of background slides up together with the menu or basically with any pop-up. It is very deterministic and repeatable.
does the problem remain when sliding in/out kickoff several times in a short frame? if not, does it reappear when suspending/resuming compositing?
At least in my case the problem disappears once I disable composition. However, disabling composition also disables the kickoff menu's animation. - Gilboa