I've been having the exact same problem with my Core i5 Lenovo Y460 laptop (64bit). I've updated various kernel's but to no avail. It is really frustrating specially since the radeon modeset workaround I found on another bug thread actually worked for my other laptop which is a 32bit Lenovo Thinkpad T60.
I've been having the exact same problem with my Core i5 Lenovo Y460 laptop (64bit). I've updated various kernel's but to no avail. It is really frustrating specially since the radeon modeset workaround I found on another bug thread actually worked for my other laptop which is a 32bit Lenovo Thinkpad T60.