11.10 Too slow after memory upgrade

[chrisreichel]

Hi.

I have a Sony Vaio VGN-FW170J, the standard configuration is with 4GB RAM.

I made a fresh install 2 days ago, everything was working fine, this release is very good.

Today I made a memory upgrade, now my laptop have 8GB RAM.
I bought the memory from All4Memory (8GB DDR2-800 (PC2-6400)). The original memory is from Samsung ($GB DDR2-666).

I checked in the BIOS, the amount is correct and the boot proceed without any hardware issues.

But something really strange happen: the Ubuntu 11.10 (64bit) boot process became very slow, it's been 15 minutes and no GDM has show.

I open the tty2, the login shell was very slow, so was the `sudo bash`.

I checked the load and background process, everything is normal. Does anybody has a clue of whats going on?

ps: I found this bug, but now answer yet.

[diasf]

are you sure your motherboard supports DDR2 800?

Something similar happened to me when i used memory of different frequency (133 instead of 100, it was a while ago!)

[chrisreichel]

The fix is:

1 - sudo vi /etc/default/grub

change GRUB_CMDLINE_LINUX="" to GRUB_CMDLINE_LINUX="enable_mtrr_cleanup mtrr_spare_reg_nr=1"

save the file

2 - sudo update-grub

3 - restart

4 - It should work... but it doens't

references:
https://bugs.launchpad.net/null/+bug/816035
http://hawknotes.blogspot.com/2010/0...rr-errors.html

[chrisreichel]

are you sure your motherboard supports DDR2 800?

Yes, according Sony Manuals.

[Theferris]

Run a memory test on it.
You could have been given a faulty stick

[trozamon]

If there was a memory problem, there's a good chance it wouldn't boot (No reason not to run a memtest thought)

OP, are you running 32-bit or 64-bit?

[chrisreichel]

I'm running the 64bit version.

I saw something related to "mtrr". Something with the video card.

With windows everything is fine, so I believe that's not regarding hardware.

I'll boot with 8Gb and collect some logs and do the same with 4Gb. Let's see.