I have Kubuntu 14.10 with 3.16.0-28 kernel and the issue still exists.
When I choose 3.11.0-20 during boot in Grub - 2560x1440@60Hz works perfectly without any xorg-config changing.
But versions 3.11.0-22 and 3.16.0-28 support only up to 1920x1200@60Hz or something like that.
So, 3.11.0-20 is the last kernel version I've used, that worked correctly for high-resolution monitors with DVI-D connection.
I have Kubuntu 14.10 with 3.16.0-28 kernel and the issue still exists.
When I choose 3.11.0-20 during boot in Grub - 2560x1440@60Hz works perfectly without any xorg-config changing.
But versions 3.11.0-22 and 3.16.0-28 support only up to 1920x1200@60Hz or something like that.
So, 3.11.0-20 is the last kernel version I've used, that worked correctly for high-resolution monitors with DVI-D connection.
Does this regression still exist and not solved?