[Konsole-devel] [Bug 77235] New: very slow X when using background image or transparency in konsole

[Sebastien Renard]

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http://bugs.kde.org/show_bug.cgi?id=77235      
           Summary: very slow X  when using background image or transparency
                    in konsole
           Product: konsole
           Version: 1.3.1
          Platform: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: konsole-devel kde org
        ReportedBy: sebastien.renard digitalfox homeip net


Version:           1.3.1 (using KDE 3.2.1, compiled sources)
Compiler:          gcc version 3.2.3
OS:          Linux (i686) release 2.6.3

If using background image or transparency in konsole X windows become very slow. If the Xfree video driver is fast, this cannot be seen with few konsole. To see it, open a konsole, select a transparency model, open 10 tabs then switch quickly from a desktop to another (ctrl-F1 ctrl-F2). X windows take 100% CPU and system become very slow during few seconds.

This bug can be reporoduce with QT 3.2.3 and QT 3.3.1 and KDE .3.2.1. On the same computer (same XFree) with KDE 3.1.4 and QT 3.2.1 there is no bug at all.

If using simple modele (like white & black) with no background image nor transparency, everything is fast even with lots of konsole.