This looks like it's due to
https://launchpad.net/ubuntu/+source/qt-x11-free/+bug/81686 .
You can verify by running 'xdpyinfo | grep resolution'. If you get some
huge crazy numbers, then that's probably it.
The workaround is to manually set the DPI information. I did this in my
xorg.conf file in the Monitor section. You need to add the following
line:
DisplaySize xxx yyy
To calculate xxx, multiply the horizontal resolution of your display by
25.4 and then divide that answer by 96.
To calculate yyy, do the same with your vertical resolution.
For my 800x600 setup, I used the following line:
DisplaySize 211 158
Restart X and then rerun xdpyinfo | grep resolution to verify that you
successfully changed the DPI setting. I got mythtv working again using
this.
--
mythfrontend on fglrx: startup crash "floating point exception"
https://launchpad.net/bugs/77291
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