I tried updating from 13.04 to 13.10, it upgraded with errors. I'm not sure of the errors it faced while updating. I have Nvidia NVS 300 graphics card.
On reboot my system stuck on splash screen. No recovery options or older kernel attempts succeed. Edited grub to bypass plymouth and have text based screen. It boots well on text based screen.
tried updating grub and fixing configuration files with dpkg but all fails.
HAL was creating issues. I removed HAL. And removed pid file once.
UPDATE: System passes splash screen but boots into text mode after failure of GDM and lightgdm. I have installed nvidia-current. Any further solutions?