[mythtv] Graphics problems and crashing mythfrontend

Fri Aug 20 14:04:35 UTC 2010

I recently started having a problem with the mythtv display.  I would 
have lines of white dots, or sometimes black dots, screens repainting 
very slowly and corner to corner like a video wipe, and freezing or 
crashing.  I ran it under gnome for awhile, but the crashes produced no 
helpful info.  I started running it under icewm and started seeing 
segmentation faults on crashes.

This system has been up for about 2 years, although I just replaced the 
power supply about 2 weeks ago after the old one died.

I got on the web site and did  a dgb output for mythfrontend per the 
instructions.  The output is below.  If this is not a problem with myth, 
I would appreciate any help on where to start looking.

Function "qFatal" not defined.
Breakpoint 1 (qFatal) pending.
[Thread debugging using libthread_db enabled]
[New Thread 0xb1c21b70 (LWP 4937)]
[New Thread 0xb12ffb70 (LWP 4938)]
[New Thread 0xb0afeb70 (LWP 4939)]
[New Thread 0xb00e0b70 (LWP 4940)]
[Thread 0xb00e0b70 (LWP 4940) exited]
[New Thread 0xb00e0b70 (LWP 4950)]
[New Thread 0xaf89bb70 (LWP 4955)]
[New Thread 0xaf05ab70 (LWP 4957)]
[New Thread 0xadfccb70 (LWP 4958)]
[New Thread 0xad7cbb70 (LWP 4959)]
[New Thread 0xab959b70 (LWP 4960)]
[Thread 0xad7cbb70 (LWP 4959) exited]
[Thread 0xadfccb70 (LWP 4958) exited]
[New Thread 0xadfccb70 (LWP 4970)]
[New Thread 0xad7cbb70 (LWP 4974)]
[New Thread 0xa52d4b70 (LWP 4975)]
[Thread 0xad7cbb70 (LWP 4974) exited]
[Thread 0xa52d4b70 (LWP 4975) exited]

Program received signal SIGSEGV, Segmentation fault.
0xb4ede6ea in ?? () from /usr/lib/libGL.so.1

Thread 12 (Thread 0xadfccb70 (LWP 4970)):
#0  0xb7fe1424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb6df67a4 in pthread_cond_timedwait@@GLIBC_2.3.2 () from 
/lib/libpthread.so.0
No symbol table info available.
#2  0xb603e94f in QWaitCondition::wait(QMutex*, unsigned long) () from 
/usr/lib/libQtCore.so.4
No symbol table info available.
#3  0xb60344c9 in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#4  0xb603e32e in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#5  0xb6df1e60 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#6  0xb5e5b20e in clone () from /lib/libc.so.6
No symbol table info available.

Thread 11 (Thread 0xab959b70 (LWP 4960)):
#0  0xb7fe1424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5e541f1 in select () from /lib/libc.so.6
No symbol table info available.
#2  0xb6110c41 in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#3  0xb603e32e in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#4  0xb6df1e60 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#5  0xb5e5b20e in clone () from /lib/libc.so.6
No symbol table info available.

Thread 8 (Thread 0xaf05ab70 (LWP 4957)):
#0  0xb7fe1424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb6df67a4 in pthread_cond_timedwait@@GLIBC_2.3.2 () from 
/lib/libpthread.so.0
No symbol table info available.
#2  0xb603e0d1 in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#3  0xb603e17d in QThread::usleep(unsigned long) () from 
/usr/lib/libQtCore.so.4
No symbol table info available.
#4  0xb74d546e in MythSignalingTimer::run() () from 
/usr/lib/libmythdb-0.23.1.so.0
No symbol table info available.
#5  0xb603e32e in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#6  0xb6df1e60 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#7  0xb5e5b20e in clone () from /lib/libc.so.6
No symbol table info available.

Thread 7 (Thread 0xaf89bb70 (LWP 4955)):
#0  0xb7fe1424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5e541f1 in select () from /lib/libc.so.6
No symbol table info available.
#2  0xb74929e2 in MythSocketThread::run() () from 
/usr/lib/libmythdb-0.23.1.so.0
No symbol table info available.
#3  0xb603e32e in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#4  0xb6df1e60 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#5  0xb5e5b20e in clone () from /lib/libc.so.6
No symbol table info available.

Thread 6 (Thread 0xb00e0b70 (LWP 4950)):
#0  0xb7fe1424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb6df63fc in pthread_cond_wait@@GLIBC_2.3.2 () from 
/lib/libpthread.so.0
No symbol table info available.
#2  0xb603e9cf in QWaitCondition::wait(QMutex*, unsigned long) () from 
/usr/lib/libQtCore.so.4
No symbol table info available.
#3  0xb6f2ac57 in MythContext::waitPrivRequest() const () from 
/usr/lib/libmyth-0.23.1.so.0
No symbol table info available.
#4  0x08062853 in ?? ()
No symbol table info available.
#5  0xb6df1e60 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#6  0xb5e5b20e in clone () from /lib/libc.so.6
No symbol table info available.

Thread 4 (Thread 0xb0afeb70 (LWP 4939)):
#0  0xb7fe1424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5e541f1 in select () from /lib/libc.so.6
No symbol table info available.
#2  0xb7544961 in SSDP::run() () from /usr/lib/libmythupnp-0.23.1.so.0
No symbol table info available.
#3  0xb603e32e in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#4  0xb6df1e60 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#5  0xb5e5b20e in clone () from /lib/libc.so.6
No symbol table info available.

Thread 3 (Thread 0xb12ffb70 (LWP 4938)):
#0  0xb7fe1424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb6df67a4 in pthread_cond_timedwait@@GLIBC_2.3.2 () from 
/lib/libpthread.so.0
No symbol table info available.
#2  0xb603e0d1 in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#3  0xb603e213 in QThread::msleep(unsigned long) () from 
/usr/lib/libQtCore.so.4
No symbol table info available.
#4  0xb7547124 in TaskQueue::run() () from /usr/lib/libmythupnp-0.23.1.so.0
No symbol table info available.
#5  0xb603e32e in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#6  0xb6df1e60 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#7  0xb5e5b20e in clone () from /lib/libc.so.6
No symbol table info available.

Thread 2 (Thread 0xb1c21b70 (LWP 4937)):
#0  0xb7fe1424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5e50e26 in poll () from /lib/libc.so.6
No symbol table info available.
#2  0xb3c4968b in g_poll () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#3  0xb3c3968f in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#4  0xb3c39a04 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#5  0xb615aeb7 in 
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) 
() from /usr/lib/libQtCore.so.4
No symbol table info available.
#6  0xb612f119 in 
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from 
/usr/lib/libQtCore.so.4
No symbol table info available.
#7  0xb612f38a in 
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from 
/usr/lib/libQtCore.so.4
No symbol table info available.
#8  0xb603b88d in QThread::exec() () from /usr/lib/libQtCore.so.4
No symbol table info available.
#9  0xb7558d5b in WorkerThread::run() () from 
/usr/lib/libmythupnp-0.23.1.so.0
No symbol table info available.
#10 0xb603e32e in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#11 0xb6df1e60 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#12 0xb5e5b20e in clone () from /lib/libc.so.6
No symbol table info available.

Thread 1 (Thread 0xb1eaa720 (LWP 4934)):
#0  0xb4ede6ea in ?? () from /usr/lib/libGL.so.1
No symbol table info available.
Cannot access memory at address 0x34c