Comment 46 for bug 1434581

Ah, that now makes sense. And since I could reach and search the older git trees today I found that we had only one SAUCE patch to vesafb in Saucy/13.10. Which was a combination of previous patches but titled as modularization patch. So having vesafb as a module was special and since Trusty/14.04 we did not need it to be a module any longer. So the patch was dropped without noticing the mtrr part.

As a quick band-aid for production systems you could add "video=vesafb:mtrr:3" to standard kernels, which should result in the same. Though I think we should reintroduce the write-combining as default.