After upgrading to media-libs/mesa-7.3-r1 mythfrontend crashes during startup. Reproducible: Always Steps to Reproduce: 1. Upgrade to media-libs/mesa-7.3-r1 2. start mythfrontend 3. Actual Results: The result is that mythfrontend crashes with the following call stack: #0 0x6f732e4c in ?? () #1 0xb5f984fc in glXWaitX () at glxcmds.c:660 #2 0xb654c34f in QGLWidget::resizeEvent () from /usr/qt/3/lib/libqt-mt.so.3 #3 0xb6317c9f in QWidget::event () from /usr/qt/3/lib/libqt-mt.so.3 #4 0xb6277075 in QApplication::internalNotify () from /usr/qt/3/lib/libqt-mt.so.3 #5 0xb627844f in QApplication::notify () from /usr/qt/3/lib/libqt-mt.so.3 #6 0xb62790da in QApplication::sendPostedEvents () from /usr/qt/3/lib/libqt-mt.so.3 #7 0xb6316c35 in QWidget::show () from /usr/qt/3/lib/libqt-mt.so.3 #8 0xb69a6c75 in MythMainWindow::Show () from /usr/lib/libmythui-0.21.so.0 #9 0xb69a8630 in MythMainWindow::Init () from /usr/lib/libmythui-0.21.so.0 #10 0x0806d6e4 in ?? () #11 0xb5be0711 in __libc_start_main () from /lib/libc.so.6 #12 0x080621b1 in ?? () This crash is caused by two uninitialized variables in the Mesa code: in function driCreateScreen the the psp->waitX and psp->waitGL is not initialized. These should be initialized to NULL. This is reported in the following bug report: http://bugs.freedesktop.org/show_bug.cgi?id=21053
Created attachment 197254 [details, diff] Patch that initializes the two unitialized variables This patch is based on the patch attached to the original bug report found here: http://bugs.freedesktop.org/show_bug.cgi?id=21053 This patch solves the problem with mythfrontend crashing during startup
Just a note: This bug does not appear to affect nVidia drivers. I ran into this bug trying to run mythtv-setup on my stand-alone backend which has an Intel 82865G card. However I had no problem with my frontend (with an nVidia card), and could also run mythtv-setup on the backend via ssh and X11Forwarding from any machine with an nVidia card. I could also run it if I forced indirect rendering with: export LIBGL_ALWAYS_INDIRECT=1 I applied the above patch in an ebuild in my overlay and it fixed the issue altogether.
(In reply to comment #2) Thanks for the update and for the suggested work-around. My crash happened for the mga driver using a Matrox 450 card. Thanks also for verifying that the patch works and solves the problem.
Fixed in both latest versions (7.5 and 7.4). We wont backport the fixes, rather update.
