Hi
Same for me, current precise with recommended updates.
Application: Kwin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8b112f7780 (LWP 25307))]
<cut>
Thread 1 (Thread 0x7f8b112f7780 (LWP 25307)):
[KCrash Handler]
#6 __GI___libc_free (mem=0x1) at malloc.c:2968
#7 0x00007f8b0e557819 in XFree (data=<optimized out>) at
../../src/XlibInt.c:1701
#8 0x00007f8b0e0ff2ee in XRRUpdateConfiguration (event=0x7fff66a34f10) at
../../src/Xrandr.c:446
#9 0x00007f8b10e49a30 in KWin::Workspace::workspaceEvent (this=0x1e83d50,
e=0x7fff66a34f10) at ../../kwin/events.cpp:460
#10 0x00007f8b10e3b288 in KWin::Application::x11EventFilter
(this=0x7fff66a35220, e=0x7fff66a34f10) at ../../kwin/main.cpp:359
#11 0x00007f8b0b728b85 in qt_x11EventFilter (ev=0x7fff66a34f10) at
kernel/qapplication_x11.cpp:441
#12 qt_x11EventFilter (ev=0x7fff66a34f10) at kernel/qapplication_x11.cpp:429
#13 0x00007f8b0b737f98 in QApplication::x11ProcessEvent (this=0x7fff66a35220,
event=0x7fff66a34f10) at kernel/qapplication_x11.cpp:3444
#14 0x00007f8b0b762b3a in QEventDispatcherX11::processEvents (this=0x1d7cad0,
flags=...) at kernel/qeventdispatcher_x11.cpp:132
#15 0x00007f8b0c335c82 in QEventLoop::processEvents (this=<optimized out>,
flags=...) at kernel/qeventloop.cpp:149
#16 0x00007f8b0c335ed7 in QEventLoop::exec (this=0x7fff66a35160, flags=...) at
kernel/qeventloop.cpp:204
#17 0x00007f8b0c33af67 in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:1148
#18 0x00007f8b10e3da06 in kdemain (argc=<optimized out>, argv=<optimized out>)
at ../../kwin/main.cpp:541
#19 0x00007f8b10a4176d in __libc_start_main (main=0x400630 <main(int, char**)>,
argc=1, ubp_av=0x7fff66a35948, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fff66a35938) at libc-start.c:226
#20 0x0000000000400661 in _start ()
Will try some random code changes and see what it does and if I find
something.
int XFree (void *data)
{ Xfree (data);
return 1;
}
int XRRUpdateConfiguration(XEvent *event)
{ XRRScreenChangeNotifyEvent *scevent;
XConfigureEvent *rcevent;
Display *dpy = event->xany.display;
XExtDisplayInfo *info;
XRandRInfo *xrri;
int snum;
/* first, see if it is a vanilla configure notify event */
if (event->type == ConfigureNotify) {
rcevent = (XConfigureEvent *) event;
snum = XRRRootToScreen(dpy, rcevent->window);
if (snum != -1) {
dpy->screens[snum].width = rcevent->width;
dpy->screens[snum].height = rcevent->height;
return 1;
} }
info = XRRFindDisplay(dpy);
RRCheckExtension (dpy, info, 0);
switch (event->type - info->codes->first_event) {
case RRScreenChangeNotify:
scevent = (XRRScreenChangeNotifyEvent *) event;
snum = XRRRootToScreen(dpy,
((XRRScreenChangeNotifyEvent *) event)->root);
if (scevent->rotation & (RR_Rotate_90 | RR_Rotate_270)) {
dpy->screens[snum].width = scevent->height;
dpy->screens[snum].height = scevent->width;
dpy->screens[snum].mwidth = scevent->mheight;
dpy->screens[snum].mheight = scevent->mwidth;
} else {
dpy->screens[snum].width = scevent->width;
dpy->screens[snum].height = scevent->height;
dpy->screens[snum].mwidth = scevent->mwidth;
dpy->screens[snum].mheight = scevent->mheight;
}
XRenderSetSubpixelOrder (dpy, snum, scevent->subpixel_order);
break;
default:
return 0;
}
xrri = (XRandRInfo *) info->data;
/*
* so the next time someone wants some data, it will be fetched;
* it might be better to force the round trip immediately, but
* I dislike pounding the server simultaneously when not necessary
*/
if (xrri->config[snum] != NULL) {
XFree (xrri->config[snum]);
xrri->config[snum] = NULL;
}
return 1;
}
Just trying to understand what it is trying to free. Maybe from the
XRRFindDisplay(..
_X_HIDDEN XExtDisplayInfo *
XRRFindDisplay (Display *dpy)
{
XExtDisplayInfo *dpyinfo;
XRandRInfo *xrri;
int i, numscreens;
dpyinfo = XextFindDisplay (&XRRExtensionInfo, dpy);
if (!dpyinfo) {
dpyinfo = XextAddDisplay (&XRRExtensionInfo, dpy,
XRRExtensionName,
&rr_extension_hooks,
RRNumberEvents, NULL);
numscreens = ScreenCount(dpy);
xrri = Xmalloc (sizeof(XRandRInfo) +
sizeof(char *) * numscreens);
xrri->config = (XRRScreenConfiguration **)(xrri + 1);
for(i = 0; i < numscreens; i++)
xrri->config[i] = NULL;
xrri->major_version = -1;
dpyinfo->data = (char *) xrri;
}
return dpyinfo;
}
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https://bugs.launchpad.net/bugs/985202
Title:
libx11 causes kwin to crash on login (over NX protocol)
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