ubuntu-x-swat team mailing list archive

[ticket <tickettothemoon2004@xxxxxxxxxxx>]

Although I understand this issue is fixed in karmic, I found that if I
issue (under karmic)

  cat /proc/mtrr

I see the output shows that mtrr is not set up.
I can fix it for my gpu card by issuing a

sudo -s
echo "base=0xe0000000 size=0x10000000 type=write-combining" >| /proc/mtrr

If I put the echo command inside  /etc/gdm/PostLogin/Default , it is
ignored in karmic (wasn't in jaunty).  I can make it stick by putting it
in /etc/rc.local  (but with the provisos noted by the posts above).

With mtrr correctly setup, their is a very slight improvement in flash
performance, so it appears to be doing something.  I am not using an
intel gpu - I have an nVidia one.

My /boot/config-2.6.31-15-generic contains

CONFIG_MTRR=y
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=0
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
CONFIG_X86_PAT=y

So does this mean I don't need to set up mtrr in karmic?  And it is safe
to ignore the wrong setup reported by  cat /proc/mtrr ?

-- 
[i915GM] MTRR entry gets removed when restarting xorg - causes corruption on ttys
https://bugs.launchpad.net/bugs/314928
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