Plymouth terminates and halts startup

[jvdb]

After upgrading from 8.04LTS to 10.04LTS, when I startup instead of getting a splash screen I get the following message near the bottom of the screen:

init: plymouth-splash main process ($id) terminated with status 1

Then the machine hangs. I can continue by pressing ctrl-alt-del, after which the following message appears:

init: alsa-mixer-save main process ($id) terminated with status 1

Then the machine appears to shutdown (messages such as "asking all processes to shutdown" or similar) but instead lands me at the log-in screen! After that there are no problems. On shutdown I do briefly see the splash screen (the dots below the Ubuntu logo).

[mosi (for-147est)]

I also in the same condition.USB-HDD installed 10.04 by upgrade from 9.10.
When 9.10 , freezed and ait sysrq R E I S U B then out.At the begining to upgrade 10.04 no freeze.This condition occured 1 week ago.

[mosi (for-147est)]

Yesterday, nvidia grafic driver update.Then accident occured in display.So purge nvidia proprietary-driver. Today isn't freeze my display.Maybe bug was fixed. Thanks!