KWin has been known as a rock-solid window manager in the KDE 3.5 times. I was wondering how the situation is nowadays with focus no longer on window managing but on compositing. Currently we are experiencing a major problem in combination of Intel/Mesa drivers with either fullscreen flash videos or OpenGL screensavers. Since the release of Kubuntu Natty we receive two to three new duplicates each day. In case you are experiencing this issue: do not report! Neither to us, nor to Mesa nor to (K)Ubuntu. It is a known issue and Upstream is working on a fix! As a workaround, do not use Flash to watch Youtube videos and do not use OpenGL screensavers. The issue is the most often reported bug against KWin of all time, now.
The fact that we receive duplicates for an issue clearly recognized by DrKonqui as already reported multiple times can tell us a lot about other problems. If we have a real stability issue we receive many bug reports and we have seen this in the past. Apart from the noise of mentioned crash above we have hardly received any new issue lately, so I thought about going through all our crash reports to get an overview of our current stability. I am also a KWin user and cannot remember a single KWin crash at work with openSUSE 11.4.
After todays and yesterdays triaging there are less than 20 open crash reports
and I am only able to reproduce one of them and fixed another one. Most of our previously open crash reports have not seen any activity over the last year(s). Many of them had been reported against 4.4 or an even older release without duplicates of newer versions. All those have been closed, given that we most likely fixed these issue. Many thanks to Thomas for fighting crashers in various effects and the window grouping functionality. (Keeping the crash reports open does not make any sense as there have been too many code changes to make any use of old crash reports.)
The remaining open issues which I am not able to reproduce are in most cases missing a description how to reproduce, so it is very unlikely that these affect our users and it is possible that they are already fixed. Given this, I am happy to say, that also as a compositor KWin is rock-solid 🙂
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