compiz team mailing list archive

[Chris Coulson <chris.coulson@xxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: compiz

This seems to happen when I'm not at my laptop (ie, when the screensaver
has activated usually). When I return to my laptop, I find it in a state
which appears to be completely frozen (ie, nothing gets repainted on the
screen). However, I can switch to a console and things appear to be
working normally. I can send a SIGKILL to compiz and start another WM,
and then everything starts working normally again (although if I restart
compiz, it often crashes until I've restarted my laptop).

If I attach gdb to the hung compiz, I always see a trace which looks
like this:

0x00007f53f3dc8e33 in __poll (fds=<value optimised out>, nfds=<value optimised out>, timeout=<value optimised out>) at ../sysdeps/unix/sysv/linux/poll.c:87
87	../sysdeps/unix/sysv/linux/poll.c: No such file or directory.
	in ../sysdeps/unix/sysv/linux/poll.c
(gdb) btbt full
#0  0x00007f53f3dc8e33 in __poll (fds=<value optimised out>, nfds=<value optimised out>, timeout=<value optimised out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = 18446744073709551100
        oldtype = 0
        result = <value optimised out>
#1  0x00007f53f738d512 in _xcb_conn_wait (c=0x1b79060, cond=<value optimised out>, vector=0x0, count=0x0) at ../../src/xcb_conn.c:313
        ret = <value optimised out>
        fd = {fd = 3, events = 1, revents = 0}
#2  0x00007f53f738eb3f in xcb_wait_for_reply (c=0x1b79060, request=390272, e=0x7fff56067648) at ../../src/xcb_in.c:378
        cond = {__data = {__lock = 0, __futex = 0, __total_seq = 0, __wakeup_seq = 0, __woken_seq = 0, __mutex = 0x0, __nwaiters = 0, __broadcast_seq = 0}, 
          __size = '\000' <repeats 47 times>, __align = 0}
        reader = {request = 390272, data = 0x7fff560675a0, next = 0x0}
        prev_reader = <value optimised out>
        widened_request = <value optimised out>
        ret = 0x0
#3  0x00007f53f75e188d in _XReply (dpy=0x1b77e10, rep=0x7fff560676a0, extra=0, discard=0) at ../../src/xcb_io.c:533
        req = 0x1b74780
        response = <value optimised out>
        error = 0x0
        c = 0x1b79060
        reply = <value optimised out>
        current = 0x1b74780
        __PRETTY_FUNCTION__ = "_XReply"
#4  0x00007f53efb6993b in DRI2WaitMSC (dpy=0x1b77e10, drawable=100, target_msc=0, divisor=2, remainder=1, ust=0x7fff56067728, msc=0x7fff56067720, sbc=0x7fff56067718) at dri2.c:616
        info = <value optimised out>
        req = <value optimised out>
        rep = {type = 64 '@', pad1 = 119 'w', sequenceNumber = 22022, length = 32767, ust_hi = 1443264328, ust_lo = 32767, msc_hi = 100, msc_lo = 0, sbc_hi = 2137562112, 
          sbc_lo = 3119085452}
#5  0x00007f53efb67df1 in dri2WaitForMSC (pdraw=<value optimised out>, target_msc=<value optimised out>, divisor=<value optimised out>, remainder=<value optimised out>, 
    ust=0x7fff56067778, msc=0x7fff56067770, sbc=0x7fff56067768) at dri2_glx.c:346
        dri2_ust = 29839872
        dri2_msc = 29878048
        dri2_sbc = 139998480560225
        ret = -516
#6  0x00007f53efb3f81f in __glXWaitVideoSyncSGI (divisor=2, remainder=1, count=0x7fff560677cc) at glxcmds.c:1775
        gc = 0x1c7e720
        psc = 0x1c77560
        pdraw = <value optimised out>
        ust = 2722
        msc = <value optimised out>
        sbc = 139998480562447
        ret = <value optimised out>
#7  0x00007f53efdb71c4 in PrivateGLScreen::waitForVideoSync() () from /usr/lib/compiz/libopengl.so
No symbol table info available.
#8  0x00007f53efdb737b in PrivateGLScreen::paintOutputs(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int, CompRegion const&) ()
   from /usr/lib/compiz/libopengl.so
No symbol table info available.
#9  0x00007f53effddb19 in CompositeScreen::paint(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int) () from /usr/lib/compiz/libcomposite.so
No symbol table info available.
#10 0x00007f53effdf930 in CompositeScreen::handlePaintTimeout() () from /usr/lib/compiz/libcomposite.so
No symbol table info available.
#11 0x00000000004219ff in CompTimeoutSource::callback() ()
No symbol table info available.
#12 0x000000000042146d in CompTimeoutSource::dispatch(sigc::slot_base*) ()
No symbol table info available.
#13 0x00007f53f5c649df in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/libglibmm-2.4.so.1
No symbol table info available.
#14 0x00007f53f5114bcd in g_main_dispatch (context=0x1ba7730) at /build/buildd/glib2.0-2.28.3/./glib/gmain.c:2440
        dispatch = 0x7f53f5c64990 <Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*)>
        was_in_call = 0
        user_data = 0x1c507a0
        callback = 0x7f53f5c64b40
        cb_funcs = 0x7f53f53bf630
        cb_data = 0x1c45fe0
        current_source_link = {data = 0x1c50730, next = 0x0}
        need_destroy = <value optimised out>
        source = 0x1c50730
        current = 0x1ba7e90
        i = <value optimised out>
#15 g_main_context_dispatch (context=0x1ba7730) at /build/buildd/glib2.0-2.28.3/./glib/gmain.c:3013
No locals.
#16 0x00007f53f51153a8 in g_main_context_iterate (context=0x1ba7730, block=<value optimised out>, dispatch=1, self=<value optimised out>)
    at /build/buildd/glib2.0-2.28.3/./glib/gmain.c:3091
        max_priority = 2147483647
        timeout = 11
        some_ready = 1
        nfds = 14
        allocated_nfds = <value optimised out>
        fds = <value optimised out>
#17 0x00007f53f51159f2 in g_main_loop_run (loop=0x1c50880) at /build/buildd/glib2.0-2.28.3/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#18 0x0000000000429fba in CompScreen::eventLoop() ()
No symbol table info available.
#19 0x0000000000422f70 in main ()

This is happening fairly often for me (3-4 times per day)

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/740126

Title:
  compiz hangs randomly several times per day