Created attachment 49716 [details] Garbled terminal output Version: 2.9.7 (using KDE 4.4.4) OS: Linux When I run irssi in yakuake and switch the channel just after telling yakuake to show again after it was hidden, it is possible to turn a section of the terminal into garbage. This is against the notion of flicker-freeness which was promised with Qt 4 ;) The attached screenshot gives an example how irssi with #kde-brasil looks in yakuake when this happens. Reproducible: Didn't try OS: Linux (x86_64) release 2.6.32-3-amd64 Compiler: cc
Reassigning to Konsole as Yakuake isn't responsible for the terminal area. (It's most likely a graphics driver bug though.)
If it helps: Xorg uses the Radeon driver. I might also try RadeonHD or VESA at some point, and in parallel try to reproduce it on a machine with embedded Intel graphics.
Apparently this is not an issue with the graphics driver, or all drivers suffer from the same issue. Both with NV and with intel the bug can easily be reproduced. Just open two terminals and switch between them while unhiding the Yakuake window. I haven't yet seen this effect with Konsole because there's no hide/unhide function in it.
Can't reproduce it with KDE-4.7.0. Feel free to reopen if this still happens in recent version.