Bug#494349: libqt3-mt: throws errors and sometimes crashes X
2008/8/12 Michel Dänzer <daenzer@debian.org>:
> On Mon, 2008-08-11 at 22:32 +0200, booiiing wrote:
>> 2008/8/9 booiiing <booiiing@gmail.com>:
>> > 2008/8/9 Julien Cristau <jcristau@debian.org>:
>> >> No, it's a bug in X. Are you using a compositing manager? Which one?
>> > deactivating it didn't change anything, however.
> Well, at least compResizeWindow() can't really be involved anymore
> without a compositing manager. It would be good to get gdb backtraces
> for both cases. BTW, which video driver are you using?
i use the closed-source driver by nvidia, version
x86_64-173.14.12-pkg2, the kernel-module is compiled by the installer
using the boxed kernel 2.6.26-2 and its headers. for the first trace
see the end of this mail.
>> > but i'll try to restart X with composite completely disabled.
>> i tried some things now, but nothing helped. the guis are still
>> malformed and i still get those error, although it seems to me that
>> there are less of them with composite disabled.
>> what worries me, is that my Xorg.0.log says
>> (**) Extension "Composite" is disabled
>> and later
>> (II) Initializing built-in extension COMPOSITE
> No worries, the latter is a bit confusing and doesn't mean the extension
> is actually enabled. You can verify it with
> xdpyinfo|grep Composite
ok, verified. thank you.
it seems that without the composite-manager the apps don't crash x
anymore, however they're still not usable.
i ran qtconfig-qt3 in gdb and set a breakpoint to
QTextParagraph::lineInfo. here is the trace:
#0 QTextParagraph::lineInfo (this=0x1c85cb0, l=0, y=@0x7fff370233ec,
h=@0x7fff370233e8, bl=@0x7fff370233e4) at kernel/qrichtext_p.cpp:554
#1 0x00007f4a2e77a79d in QTextParagraph::paint (this=0x1c85cb0,
painter=@0x1e07450, cg=@0x7fff37023720, cursor=0x0, drawSelections=false,
clipx=0, clipy=0, clipw=196, cliph=520) at kernel/qrichtext.cpp:4623
#2 0x00007f4a2e77b2ec in QTextDocument::drawParagraph (this=0x7fff370234e0,
p=0x7fff370237f0, parag=0x1c85cb0, cx=0, cy=0, cw=196, ch=520,
doubleBuffer=@0x7fff370235e8, cg=@0x7fff37023720, drawCursor=false,
cursor=0x0, resetChanged=true) at kernel/qrichtext.cpp:3240
#3 0x00007f4a2e77bc4d in QTextDocument::draw (this=0x1c804f0,
p=0x7fff370237f0, cx=0, cy=0, cw=196, ch=520, cg=@0x7fff37023720,
onlyChanged=false, drawCursor=false, cursor=0x1d58070, resetChanged=true)
at kernel/qrichtext.cpp:3300
#4 0x00007f4a2e855d5c in QTextEdit::paintDocument (this=0x1c7d120,
drawAll=true, p=0x7fff370237f0, cx=0, cy=0, cw=196, ch=520)
at widgets/qtextedit.cpp:1059
#5 0x00007f4a2e8698ee in QTextEdit::drawContents (this=0x1c85cb0,
p=0x7fff370237f0, cx=0, cy=0, cw=196, ch=520) at widgets/qtextedit.cpp:1081
#6 0x00007f4a2e81c8c7 in QScrollView::viewportPaintEvent (this=0x1c7d120,
pe=0x7fff37023d00) at widgets/qscrollview.cpp:1709
#7 0x00007f4a2e81dc33 in QScrollView::eventFilter (this=0x1c7d120,
obj=0x1c7e0a0, e=0x7fff37023d00) at widgets/qscrollview.cpp:1492
#8 0x00007f4a2e867295 in QTextEdit::eventFilter (this=0x1c7d120, o=0x1c7e0a0,
e=0x7fff37023d00) at widgets/qtextedit.cpp:3030
#9 0x00007f4a2e725972 in QObject::activate_filters (this=0x1c7e0a0,
e=0x7fff37023d00) at kernel/qobject.cpp:906
#10 0x00007f4a2e7259c7 in QObject::event (this=0x1c7e0a0, e=0x7fff37023d00)
at kernel/qobject.cpp:738
#11 0x00007f4a2e756df3 in QWidget::event (this=0x1c85cb0, e=0x0)
at kernel/qwidget.cpp:4681
#12 0x00007f4a2e6d0953 in QApplication::internalNotify (
this=<value optimized out>, receiver=0x1c7e0a0, e=0x7fff37023d00)
at kernel/qapplication.cpp:2638
#13 0x00007f4a2e6d162e in QApplication::notify (this=0x7fff37024510,
receiver=0x1c7e0a0, e=0x7fff37023d00) at kernel/qapplication.cpp:2526
#14 0x00007f4a2e6a7f11 in QWidget::repaint (this=0x1c7e0a0, reg=@0x1d58050,
erase=false) at kernel/qapplication.h:523
#15 0x00007f4a2e6d20d5 in QApplication::sendPostedEvents (receiver=0x0,
event_type=0) at kernel/qapplication.cpp:3299
#16 0x00007f4a2e6869dd in QEventLoop::processEvents (this=0x1c3ff80, flags=4)
at kernel/qeventloop_x11.cpp:147
#17 0x00007f4a2e6e5001 in QEventLoop::enterLoop (this=0x1c85cb0)
at kernel/qeventloop.cpp:201
#18 0x00007f4a2e6e4eb2 in QEventLoop::exec (this=0x1c85cb0)
at kernel/qeventloop.cpp:148
#19 0x000000000040f26d in main (argc=1, argv=<value optimized out>)
at main.cpp:44
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