i have a lenovo Y330 laptop with ati radeon graphics card. i have been running ubuntu on it for 1 month, and it's been working fine. however, since yesterday, whenever I boot up, it works fine , everything loads perfectly until it reaches the point where the login screen should be appearing. instead, i see a black screen, with only the cursor( the very same cursor which appears just before login) with a busy sign. im able to login to text mode. some people suggested me to change some stuff in the xorg.conf file, but it has been unsuccessful so far. please help me out..

also, my Xorg.0.log file has the following error:
(EE) Radeon (0) : Acceleration initialization failed

I have a toshiba laptop with a radeon card. Are you using the kernel tree driver, and not some ATI thing?

Anyway, if you post your xorg.conf file I could check it against mine, or possibly recommend what to eliminate ("acceleration" failure might mean try taking out the glx and dri references).

my xorg.conf file:
Section "Device"
Identifier "Configured Video device"
EndSection

Section "monitor"
Identifier "configured monitor"
Endsection

Section "Screen"
Identifier "Default screen"
Monitor "Configured monitor"
Device "configured video device"
Defaultdepth 24
Endsection

guys .. please help me out... i really dont want to be stuck with vista

anyone?