[mythtv-users] Problems running mythtv-setup on backend with Intel 82865G

[Tom Dexter]

I'm running 0.21-fixes rev 20500 under Gentoo.  This seems like a
pretty ugly one to figure out.  For quite some time when I've needed
to run mythtv-setup on my backend, I do so via an ssh session from my
everyday machine (using X11Forwarding).

As a result, it wasn't until today that I discovered that, if I try to
run mythtv-setup from within X on the backend itself it segfaults:

 mythtv-setup
2009-07-09 15:01:32.021 Using runtime prefix = /usr
2009-07-09 15:01:32.031 DPMS is active.
2009-07-09 15:01:32.032 Empty LocalHostName.
2009-07-09 15:01:32.033 Using localhost value of mythback
2009-07-09 15:01:32.046 New DB connection, total: 1
2009-07-09 15:01:32.052 Connected to database 'mythconverg' at host: localhost
2009-07-09 15:01:32.054 Closing DB connection named 'DBManager0'
2009-07-09 15:01:32.056 Primary screen 0.
2009-07-09 15:01:32.062 Connected to database 'mythconverg' at host: localhost
2009-07-09 15:01:32.068 Using screen 0, 1280x960 at 0,0
2009-07-09 15:01:32.082 New DB connection, total: 2
2009-07-09 15:01:32.088 Connected to database 'mythconverg' at host: localhost
2009-07-09 15:01:32.094 Current Schema Version: 1214
2009-07-09 15:01:32.143 Primary screen 0.
2009-07-09 15:01:32.145 Using screen 0, 1280x960 at 0,0
2009-07-09 15:01:32.147 No theme dir: /home/tom/.mythtv/themes/G.A.N.T
2009-07-09 15:01:32.148 Switching to square mode (G.A.N.T)
2009-07-09 15:01:32.187 Using the Qt painter
2009-07-09 15:01:32.187 JoystickMenuClient Error: Joystick disabled -
Failed to read /home/tom/.mythtv/joystickmenurc
Segmentation fault

That joystick error has nothing to do with that...I've always gotten that.

That machine has an Intel 82865G:

00:02.0 VGA compatible controller: Intel Corporation 82865G Integrated
Graphics Controller (rev 02)

I've been reading nightmarish accounts of problems getting DRI working
with the 865G chipsets under xorg 1.5.3, however I've never even used
DRI on that machine before and still don't have it in my kernel at
all.  What's really confusing me is that glxinfo says "Direct
Rendering: yes" even though no drm modules are even loaded...that
really seems off.  I've tried everything I can find to force disable
DRI in xorg.conf, but glxinfo _still_ says direct rendering is
enabled...any idea what that's all about?  I have no idea if that has
anything to do with is anyway.

Again, the program itself seems fine as it works when from my main
Gentoo box via ssh with X11Forwarding.  That machine has an old nVidia
GeForce4 card and is running the same version of xorg-server.
Interestingly, it even works from that machine if I start X with the
vesa drivers.

That all got me curious, so I decided to try running it via ssh from
various clients.  That results seem to be all over the map with some
experiencing the segfault and others working fine:

Running from an ssh session from my frontend (Gentoo...same versions
of everything and an nVidia 7xxx card): OK.