Re: Upgrade to 12.10 - can't log in through lightdm or gdm
As your ' linux-headers-generic' was updated, try Purging and Re-installing your video driver.
There is a lot of trouble about with 12.10 updates not properly installing that file and the video driver - both AMD & NVIDIA- failing to create the needed kernal module as a result.
"Better Solutions may bring Worsened Problems": After Lao Tse, b. circa 405BC. a contemporary of Confucius, who died circa 600BC.
They did things differently in those days, apparently!!