Stephan: Does applying the patch in #19 to 3.12.6 help?
Please post the output of `sudo lspci -vvv`, `sudo lspci -vvv -n`, and `sudo dmidecode`. Who is your motherboard manufacturer?
Stephan: Does applying the patch in #19 to 3.12.6 help?
Please post the output of `sudo lspci -vvv`, `sudo lspci -vvv -n`, and `sudo dmidecode`. Who is your motherboard manufacturer?