Mythfrontend, mythtv-setup segfault

[James Muscat]

Binary package hint: mythtv

This occurs with both the packaged version of MythTV and the latest SVN head (which I was running until upgrade to Feisty broke it). It's not the same as #63486 or #63957, the backtrace does not mention festival.

Both mythfrontend and mythtv-setup segfault shortly after launching (I believe just as they initialise the GUI). mythbackend runs without problems.

I will attach a backtrace as a comment; I'll compile a debug of SVN and attach a backtrace for that as well. This happened both on an Edgy->Feisty upgrade (where before the SVN was working perfectly) as well as a fresh Feisty install.

[James Muscat (james-muscat)]

SVN backtrace almost identical (but without the "no symbols found" messages).

[Paladine (paladine)]

This is also reproducible in Gutsy and is caused by mythtv using xrandr which is killed by Xinerama. Currently building from svn with --disable-xrandr passed during configure, will post results. I am pretty sure that will fix the problem.

Paladine

[Paladine (paladine)]

I can now confirm building from svn with ./configure --disable-xrandr fixes this problem for xinerama setups.

[James Muscat (james-muscat)]

Also confirmed as a fix here on Feisty. I also believe Xinerama + xrandr breaks guidance-power-manager; it seems there are quite a few bugs associated to that package.

[Paladine (paladine)]

Well the problem is Xinerama disables XRandR extension in xorg, so if something requires XRandR and Xinerama is running, it will fail due to XRandR not being available. This is actually partially fixed by XRandR 1.2 which now has it's own Xinerama controls built in, however, currently only Intel and I think ATI FOSS drivers support the XRandR 1.2 spec. I was talking to the NVidia proprietry driver devs yesterday regarding XRandR 1.2 support and they said they are planning to make the official drivers XRandR 1.2 compliant but there is no scheduled release date at this time (it is quite a new spec).

This means once the drivers support the new spec, users will not need to enable Xinerama in their xorg.conf as it will be handled by XRandR and thus XRandR won't be disabled by the traditional Xinerama running.

Hope that makes sense?

Paladine

[David Morris (dave-greenacre)]

Thanks for the info Paladine , there is also a patch which has been provided in http://svn.mythtv.org/trac/ticket/3401

[David Morris (dave-greenacre)]

XRandR rears its head again, I'll let you look at the patch for this, same problem as another bug.

[Mario Limonciello (superm1)]

This has been included since the 0.20.2 tagged release was first included (revision number 14223 had it)