kernel26 2.6.12.2-1 "mtrr: type mismatch"

ozar · 2005-07-09 01:59:05

Anyone know why I'm getting the following "mtrr: type mismatch" comments at system boot after upgrading to the newly released kernel?

Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,4000000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,2000000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,1000000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,800000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,400000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,200000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,100000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,80000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,40000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,20000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,10000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,8000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,4000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,2000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: type mismatch for e0000000,1000 old: write-back new: write-combining
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x800  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x400  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x200  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x100  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x80  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x40  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x20  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x10  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x8  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x4  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x2  base: 0xe0000000
Jul  8 20:34:53 compuser mtrr: size and base must be multiples of 4 kiB
Jul  8 20:34:53 compuser mtrr: size: 0x1  base: 0xe0000000

I never had this with any of the previous kernels.

Thanks in advance for any help!

Edit: Okay, I've gone ahead and opened a bug report on this because I haven't changed anything on the system other than upgrading to the new kernel.

phrakture · 2005-07-12 18:27:03

hmmm - grep mtrr /etc/sysctrl.conf ? does that return anything? if so, I'd say comment it out - otherwise, do nothing, heh 8)

ozar · 2005-07-12 23:08:15

Hi, phrakture - - thanks for the suggestion but I've already returned to the previous kernel and the long series of mtrr messages went away. I didn't run across any other problems with the kernel.

The default Archlinux kernels usually work well for me so I might wait for the next kernel upgrade, or perhaps go ahead and compile a custom kernel.

Thanks again!

ozar · 2005-10-23 16:25:21

Update in case anyone else is experiencing this...

I've still been getting these errors on all the updated stock kernels ever since 2.6.12 was released. It appears to be a kernel bug, and hopefully will be patched soon.

In the interim, the only two ways I've found to stop these errors are to add video=vesafb:nomtrr to the kernel line in my menu.lst file, or add video=vesafb:mtrr:2 to the same line.

Arch Linux

#1 2005-07-09 01:59:05

kernel26 2.6.12.2-1 "mtrr: type mismatch"

#2 2005-07-12 18:27:03

Re: kernel26 2.6.12.2-1 "mtrr: type mismatch"

#3 2005-07-12 23:08:15

Re: kernel26 2.6.12.2-1 "mtrr: type mismatch"

#4 2005-10-23 16:25:21

Re: kernel26 2.6.12.2-1 "mtrr: type mismatch"

Board footer