Since the Edgy driver didn't help, please upgrade to the Feisty driver again (you can use Update Manager).
Mike, if you can find an Edgy live CD to try, it would be interesting to know if it's a regression. w4ett tweaks would not help since 1) memory detection works fine 2) FBDev usually makes things worse (it's off by default) 3) You have a PCI card, so it can not run AGP .
Since the Edgy driver didn't help, please upgrade to the Feisty driver again (you can use Update Manager).
Mike, if you can find an Edgy live CD to try, it would be interesting to know if it's a regression. w4ett tweaks would not help since 1) memory detection works fine 2) FBDev usually makes things worse (it's off by default) 3) You have a PCI card, so it can not run AGP .