I tried your xorg.conf (adjusting for my actual screen) and still no luck. In addition, after the latest updates, the problem seems worse. Now, I can't even log in when disabling hardware acceleration. Starting gdm just gives me a blank screen. It doesn't seem to crash any more though so I can switch to the console and stop it manually. The log shows many errors like this:
(EE) intel(0): underrun on pipe A! Perhaps Mandriva is using a different version of xorg or they have patched it to work around this issue. -- Hard crash entering X with Intel 82845G chipset https://bugs.launchpad.net/bugs/285250 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
