Since last week, my Ubuntu 13.04 installation started booting up in low graphics mode out of nowhere. I tried a number of solutions found on this site but to no avail. The other night, I decided to upgrade to 13.10 to see if the issue would be fixed in the process. Since then, the system starts fine, but when I login to my account, I'm just presented with a black screen. I switched to the terminal and did any necessary updates, but to no avail. I don't even know where to start debugging this issue, so I'd appreciate if someone could point me towards the first place to start looking?
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lightdmdisplay manager? You can reconfigure it by executingsudo dpkg-reconfigure lightdmand when ask to select default display manager, chose lightdm from the list. and then OK. After that try to re-start your system:sudo reboot– Saurav Kumar Oct 28 '13 at 21:45