All other aspects of mythtv seem fine, but live tv is not possible. I have reinstalled gentoo from scratch (2.6.12-gentoo-r10) but the problem persists. Ironically, my first installation worked for a while. It also worked with a 2.6.12-gentoo-r6 kernel, but I couldn't get unichrome to install at the time. Reproducible: Always Steps to Reproduce: 1. start mythfrontend 2. select 'watch tv' 3. Actual Results: output from mythfrontend: 2005-09-21 21:28:44.466 New DB connection, total: 1 Total desktop width=1280, height=1024, numscreens=1 2005-09-21 21:28:44.495 Using screen 0, 1280x1024 at 0,0 2005-09-21 21:28:44.550 mythfrontend version: 0.18.1.20050510-1 www.mythtv.org 2005-09-21 21:28:44.551 Enabled verbose msgs : important general 2005-09-21 21:28:44.963 Switching to square mode (G.A.N.T.) 2005-09-21 21:28:47.301 Joystick disabled. 2005-09-21 21:28:47.545 Registering Internal as a media playback plugin. 2005-09-21 21:28:47.730 Registering MythDVD DVD Media Handler as a media handler 2005-09-21 21:28:47.732 Registering MythDVD VCD Media Handler as a media handler 2005-09-21 21:28:48.784 Registering MythMusic Media Handler as a media handler 2005-09-21 21:29:11.940 New DB connection, total: 2 2005-09-21 21:29:12.057 Connecting to backend server: 192.168.7.2:6543 (try 1 of 5) 2005-09-21 21:29:12.098 Using protocol version 15 2005-09-21 21:29:12.788 Using protocol version 15 2005-09-21 21:29:15.291 Opening audio device '/dev/dsp'. 2005-09-21 21:29:15.291 Opening OSS audio device '/dev/dsp'. 2005-09-21 21:29:15.391 Using XV port 68 2005-09-21 21:29:16.286 Changing from None to WatchingLiveTV 2005-09-21 21:29:16.307 Using realtime priority. and then segmentation fault. gdb backtrace: Starting program: /usr/bin/mythfrontend [Thread debugging using libthread_db enabled] [New Thread 16384 (LWP 12781)] [New Thread 32769 (LWP 12784)] [New Thread 16386 (LWP 12785)] [New Thread 32771 (LWP 12786)] [New Thread 49156 (LWP 12787)] [Thread 32771 (LWP 12786) exited] [Thread 49156 (LWP 12787) exited] [New Thread 65539 (LWP 12789)] [New Thread 81924 (LWP 12793)] [New Thread 98309 (LWP 12794)] [New Thread 114694 (LWP 12795)] [New Thread 131079 (LWP 12796)] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 98309 (LWP 12794)] 0xb6533271 in select () from /lib/libc.so.6 #0 0xb6533271 in select () from /lib/libc.so.6 No symbol table info available. #1 0xb6f8dbc0 in ?? () from /usr/qt/3/lib/libqt-mt.so.3 No symbol table info available. #2 0xae88cd00 in ?? () No symbol table info available. #3 0xae88cc30 in ?? () No symbol table info available. #4 0x00000000 in ?? () No symbol table info available. #5 0xb6bffe01 in QSocketDevice::waitForMore (this=0x82e6fc0, msecs=200, timeout=0x0) at qsocketdevice_unix.cpp:727 fds = {fds_bits = {1048576, 0 <repeats 31 times>}} tv = {tv_sec = 0, tv_usec = 200000} rv = -1366766544 #6 0xb74d1eae in RemoteFile::Read (this=0x8273130, data=0xadf34c08, size=128000) at remotefile.cpp:263 recv = 44888 sent = 128000 zerocnt = 1 error = false response = false strlist = {<QValueList<QString>> = {sh = 0x84f4960}, <No data fields>} #7 0xb7c4aea7 in RingBuffer::safe_read (this=0x82b7f48, rf=0x8273130, data=0xadf34c08, sz=128000) at RingBuffer.cpp:634 ret = 0 #8 0xb7c4b979 in RingBuffer::ReadAheadThread (this=0x82b7f48) at RingBuffer.cpp:853 totfree = 128000 ret = 128000 used = 687105 #9 0xb7c4b6bd in RingBuffer::startReader (type=0x82b7f48) at RingBuffer.cpp:792 rbuffer = (RingBuffer *) 0x82b7f48 #10 0xb71e413d in pthread_start_thread () from /lib/libpthread.so.0 No symbol table info available. #11 0xb71e42e2 in pthread_start_thread_event () from /lib/libpthread.so.0 No symbol table info available. #12 0xb65399da in clone () from /lib/libc.so.6 No symbol table info available. I have reemerged qt with debug but this has not filled in the ??. Is there anything else I could do before reemerging the entire system with debug. Expected Results: Live tv. I have an epia M10000 mobo with the unichrome drivers and dri from masked portage. mplayer and xine work with unichrome drivers. My backend is a seperate machine running FC3. Mythtv version is 0.18.2. I'll have to supply the emerge info, because I emailed all the stuff I thought would be useful to work, and unfortunately didn't send my USE flags or any other info. Let me know what you need and how to get it. Thanks
emerge info: Gentoo Base System version 1.6.13 Portage 2.0.51.22-r2 (default-linux/x86/2005.1, gcc-3.3.6, glibc-2.3.5-r1, 2.6.12-gentoo-r10 i686) ================================================================= System uname: 2.6.12-gentoo-r10 i686 VIA Nehemiah dev-lang/python: 2.3.5-r2 sys-apps/sandbox: 1.2.12 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6 sys-devel/binutils: 2.15.92.0.2-r10 sys-devel/libtool: 1.5.18-r1 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-mcpu=i686 -msse -mmmx -mfpmath=sse -Os -pipe -fomit-frame-pointer -ggdb" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-mcpu=i686 -msse -mmmx -mfpmath=sse -Os -pipe -fomit-frame-pointer -ggdb" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/Linux/distributions/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.uk.gentoo.org/gentoo-portage" USE="x86 X alsa apm arts avi berkdb bitmap-fonts cle266 crypt cups curl dvd eds emboss encode esd fam flac foomaticdb fortran frontendonly gdbm gif gnome gpm gstreamer gtk gtk2 imagemagick imlib ipv6 joystick jpeg kde libg++ libwww lirc mad mikmod mmx mmx2 motif mp3 mpeg mysql mythtv ncurses nls ogg oggvorbis opengl oss pam pdflib perl png python qt quicktime readline sdl spell sse ssl tcpd tiff transcode truetype truetype-fonts type1-fonts unichrome usb vorbis xine xml2 xmms xv xvmc zlib video_cards_via userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS
To improve debugging: - include "nostrip" in FEATURES - don't put -fomit-frame-pointer in CFLAGS - put -g in CFLAGS
Right now based on your backtrace without doing what Maurice said, you're having a crash from a QT function calling something in glibc. My guess is going to be your CFLAGS are flawed. Lots of issues disappear with using -O2 rather then -Os and not using sse for fpmath. But right now it looks like a system issue rather then MythTV issue.
Need the requested info.
