Problem was that vesafb.c moved from drivers/video to drivers/video/fbdev which caused the patch no longer to apply. So it was accidentally dropped at some point between Vivid and now. The Trusty patch was:
commit 24924c740ea3c5c15a27f391171fad2ca93582a2 Author: Stefan Bader <[email protected]> Date: Tue Apr 21 14:54:52 2015 +0200 UBUNTU: SAUCE: vesafb: Set mtrr:3 (write-combining) as default ** Also affects: linux (Ubuntu Xenial) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1605662 Title: Console extremely slow with 4.4 kernels for servers with Matrox G200er2 or similar To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1605662/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
