Ok, thanks Charles. It seems that it didn't like that option that was added to /etc/modprobe.d/options - you can remove it now, it was a suggestion from some one in #ubuntu-kernel.
With it, we see
Jan 30 19:50:15 Tardis-T500 kernel: [ 12.263200] thinkpad_acpi: Unknown parameter `backlight'
I'll mark this bug as Triaged now so a developer can look at it. There is a wealth of information here, though they might ask for more. Thank you again for reporting this.
Ok, thanks Charles. It seems that it didn't like that option that was added to /etc/modprobe. d/options - you can remove it now, it was a suggestion from some one in #ubuntu-kernel.
With it, we see
Jan 30 19:50:15 Tardis-T500 kernel: [ 12.263200] thinkpad_acpi: Unknown parameter `backlight'
I'll mark this bug as Triaged now so a developer can look at it. There is a wealth of information here, though they might ask for more. Thank you again for reporting this.