I am suspicious that the following mtrrs though reasonable looking are actually the issue:
[ 0.000000] MTRR variable ranges enabled: [ 0.000000] 0 base 000000000 mask F80000000 write-back [ 0.000000] 1 base 07E800000 mask FFF000000 uncachable [ 0.000000] 2 base 07F800000 mask FFF800000 uncachable [ 0.000000] 3 base 07E700000 mask FFFF00000 uncachable Note that 1 and 2 overlap, this is normally a situation which triggers 'undefined' behaviour including doing utterly the wrong thing. We should try booting with enable_mtrr_cleanup and see if that helps any. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/816035 Title: Memory upgrade makes Ubuntu painfully slow To manage notifications about this bug go to: https://bugs.launchpad.net/null/+bug/816035/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
