Program received signal SIGPIPE, Broken pipe.
[Switching to Thread 0xb7c496b0 (LWP 12734)]
0xb7f6c410 in __kernel_vsyscall ()
(gdb) backtrace full
#0  0xb7f6c410 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb7db82e8 in writev () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2  0x081bcb7e in _XSERVTransSocketWritev (ciptr=0x85aa430, buf=0xbffa7b04, 
    size=1) at /usr/include/X11/Xtrans/Xtranssock.c:2192
No locals.
#3  0x081bb7ef in _XSERVTransWritev (ciptr=0x85aa430, buf=0xbffa7b04, size=1)
    at /usr/include/X11/Xtrans/Xtrans.c:914
No locals.
#4  0x081b66d6 in FlushClient (who=0x85a5220, oc=0x86138b8, extraBuf=0x0, 
    extraCount=0) at ../../os/io.c:1060
        before = <value optimized out>
        remain = -1074103548
        i = 1
        len = <value optimized out>
        oco = (ConnectionOutputPtr) 0x83b8c38
        connection = 51
        trans_conn = (XtransConnInfo) 0x85aa430
        iov = {{iov_base = 0x83bd740, iov_len = 32}, {iov_base = 0x85a9ccc, 
    iov_len = 81}, {iov_base = 0x81daf84, iov_len = 3220863800}}
        written = 0
        padsize = 0
        notWritten = 32
        todo = 32
        padBuffer = "\000\000"
#5  0x081b5161 in CloseDownConnection (client=0x85a5220)
    at ../../os/connection.c:1048
        oc = (OsCommPtr) 0x86138b8
#6  0x08087805 in CloseDownClient (client=0x85a5220)
    at ../../dix/dispatch.c:3600
No locals.
#7  0x0808d910 in Dispatch () at ../../dix/dispatch.c:513
        result = 136353016
        client = (ClientPtr) 0x85a5220
        nready = 0
        start_tick = 980
#8  0x0807471b in main (argc=10, argv=0xbffa80e4, envp=0x85a9ccc)
    at ../../dix/main.c:452
        i = 1
        error = 136163204
        xauthfile = <value optimized out>
        alwaysCheckForInput = {0, 1}
(gdb) info registers
eax            0xffffffe0       -32
ecx            0xbffa7b04       -1074103548
edx            0x1      1
ebx            0x33     51
esp            0xbffa7a60       0xbffa7a60
ebp            0xbffa7a88       0xbffa7a88
esi            0x1      1
edi            0xb7e33ff4       -1209843724
eip            0xb7f6c410       0xb7f6c410 <__kernel_vsyscall+16>
eflags         0x203246 [ PF ZF IF #12 #13 ID ]
cs             0x73     115
ss             0x7b     123
ds             0x7b     123
es             0x7b     123
fs             0x0      0
gs             0x33     51
(gdb) thread appliy all backtrace

Thread 1 (Thread 0xb7c496b0 (LWP 12734)):
#0  0xb7f6c410 in __kernel_vsyscall ()
#1  0xb7db82e8 in writev () from /lib/tls/i686/cmov/libc.so.6
#2  0x081bcb7e in _XSERVTransSocketWritev (ciptr=0x85aa430, buf=0xbffa7b04, 
    size=1) at /usr/include/X11/Xtrans/Xtranssock.c:2192
#3  0x081bb7ef in _XSERVTransWritev (ciptr=0x85aa430, buf=0xbffa7b04, size=1)
    at /usr/include/X11/Xtrans/Xtrans.c:914
#4  0x081b66d6 in FlushClient (who=0x85a5220, oc=0x86138b8, extraBuf=0x0, 
    extraCount=0) at ../../os/io.c:1060
#5  0x081b5161 in CloseDownConnection (client=0x85a5220)
    at ../../os/connection.c:1048
#6  0x08087805 in CloseDownClient (client=0x85a5220)
    at ../../dix/dispatch.c:3600
#7  0x0808d910 in Dispatch () at ../../dix/dispatch.c:513
#8  0x0807471b in main (argc=10, argv=0xbffa80e4, envp=0x85a9ccc)
    at ../../dix/main.c:452
(gdb) cont
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x081b6720 in FlushClient (who=0x83a67c8, oc=0x83a69b0, extraBuf=0x0, 
    extraCount=0) at ../../os/io.c:1055
        in ../../os/io.c
(gdb) backtrace full
#0  0x081b6720 in FlushClient (who=0x83a67c8, oc=0x83a69b0, extraBuf=0x0, 
    extraCount=0) at ../../os/io.c:1055
        before = <value optimized out>
        remain = 0
        i = 1
        len = 32
        oco = (ConnectionOutputPtr) 0x8586308
        connection = 32
        trans_conn = (XtransConnInfo) 0x8366f60
        iov = {{iov_base = 0x890a0000, iov_len = 32}, {iov_base = 0x81daf84, 
    iov_len = 145241216}, {iov_base = 0x8b2e3e8, iov_len = 3220863880}}
        written = 0
        padsize = 0
        notWritten = 32
        todo = 32
        padBuffer = "\000\000"
#1  0x081b70c4 in FlushAllOutput () at ../../os/io.c:812
        index = <value optimized out>
        mask = 0
        oc = (OsCommPtr) 0x83a69b0
        client = (ClientPtr) 0x83a67c8
        newoutput = <value optimized out>
#2  0x0808d915 in Dispatch () at ../../dix/dispatch.c:524
        result = 136353016
        client = (ClientPtr) 0x8b2e3e8
        nready = 0
        start_tick = 3360
#3  0x0807471b in main (argc=10, argv=0xbffa80e4, envp=)
    at ../../dix/main.c:452
        i = 1
        error = 136163204
        xauthfile = <value optimized out>
        alwaysCheckForInput = {0, 1}
(gdb) info rgisters
(gdb) info rgegisters
eax            0x890a0000       -1995833344
ecx            0x0      0
edx            0x20     32
ebx            0x81daf84        136163204
esp            0xbffa7aec       0xbffa7aec
ebp            0xbffa7b48       0xbffa7b48
esi            0x1      1
edi            0x20     32
eip            0x81b6720        0x81b6720 <FlushClient+224>
eflags         0x213246 [ PF ZF IF #12 #13 RF ID ]
cs             0x73     115
ss             0x7b     123
ds             0x7b     123
es             0x7b     123
fs             0x0      0
gs             0x33     51
(gdb) thraead apply all backtrace

Thread 1 (Thread 0xb7c496b0 (LWP 12734)):
#0  0x081b6720 in FlushClient (who=0x83a67c8, oc=0x83a69b0, extraBuf=0x0, 
    extraCount=0) at ../../os/io.c:1055
#1  0x081b70c4 in FlushAllOutput () at ../../os/io.c:812
#2  0x0808d915 in Dispatch () at ../../dix/dispatch.c:524
#3  0x0807471b in main (argc=10, argv=0xbffa80e4, envp=)
    at ../../dix/main.c:452

-- 
[Hardy] Xorg crashed with SIGSEGV in FlushClient()
https://bugs.launchpad.net/bugs/212079
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