X Server 1.11.3(Ubuntu 12.04) crashes just after start on Geforce 9400(driver 295.40)

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I have Mac mini (Early 2009) which use Nvidia Geforce 9400 and install Ubuntu 11.10 with Nvidia driver version 290 (sorry, I forget minor version.) 280.13. It's running just fine until I upgrade to 12.04. After reboot, the screen turn on for boot message for a while, then it just turn off because there isn't any signal. But I still can SSH to my Mac, so I look at /var/log/Xorg.0.log and found these word:

(EE) NVIDIA(GPU-0): Failed to tear down EVO channel
(EE) NVIDIA(GPU-0): EVO Push buffer channel allocation failed
(EE)  *** Aborting ***
(EE) NVIDIA(GPU-0): Failed to allocate EVO DMA push buffer
(EE)  *** Aborting ***

So, I disabled lightdm and reboot. Then I start X with `startx -- -logverbose 6` (as recommend in guide), then I run nvidia-bug-report.sh as root to generate bug report. I have attached it below.
Sorry for my poor English (I'm not native speaker.) and hopefully these data will be enough for diagnose.

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I have tried Nvidia driver 295.49 from Nvidia download page today. The result isn't much difference. I have include bug report below. But sometimes when I really lucky (usually after I re-install new version of driver) it's magically working. So I created bug report when working and attach it below as well.

I will now try 302.07.