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#1 2012-10-09 03:17:54

spud
Member
From: Australia, NSW
Registered: 2012-10-09
Posts: 4

x86_64 installation won't boot after memory upgrade

Hello all,
I have installed Arch x86_64 on my laptop with 3gb ram. This worked fine. I upgraded to 4gb ram and now it won't boot. I'm unable to determine where the process fails because my 'pause' button won't pause the output.
Interestingly, it will no longer boot the Arch dual-boot iso. I have tried the latest update to that and still no go.
Linux Mint x86_64 boots fine. I realize they are entirely different distributions, but thought it wise to mention that. My bios picks up the new ram and I have run the Memtest from the iso and it all passed. Both sticks of ram are DDR2-333 and the CAS is 5-5-5-15 for both.
I'm a bit flumoxed by this and don't understand the reason the memory upgrade would cause the installation to fail. Any input would be greatly appreciated.

Spud

Last edited by spud (2012-10-09 03:21:59)

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#2 2012-10-09 06:22:27

alephomega
Member
From: Barcelona (for now)
Registered: 2012-09-19
Posts: 15

Re: x86_64 installation won't boot after memory upgrade

How far (approximately) into the boot process does it fail? It does it make it to the bootloader? Does it unpack the initramfs? How is it failing?

Have you done anything besides change memory since your last reboot?
Does replacing the old memory make it boot again?

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#3 2012-10-09 06:42:18

spud
Member
From: Australia, NSW
Registered: 2012-10-09
Posts: 4

Re: x86_64 installation won't boot after memory upgrade

Yes, it does make it to the bootloader. If I try to boot into the OS it fails just after the initramfs, by this I mean it cycles the computer back to a restart. If I try to boot the ISO it gets a bit farther, but produces the same result (restart).
I have done nothing but change the ram to cause this problem.
Yes, if I downgrade the memory back to 3gb it will boot again. What seems odd to me is that Linux Mint x86_64 live cd will boot into the desktop and that the bios and memtest see the additional ram.
I'm not sure where in the boot process it is recognizing the difference in the ram size and if that might be something that I can change. Do you have any suggestions?

The computer is a Lenovo 3000 N500 Laptop.

Last edited by spud (2012-10-09 06:59:33)

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#4 2012-10-09 16:31:58

alephomega
Member
From: Barcelona (for now)
Registered: 2012-09-19
Posts: 15

Re: x86_64 installation won't boot after memory upgrade

Sorry; I'm going to have to step aside, here. I was just making sure it was actually arch-related somehow, and gather more information for the more knowledgeable members of the forums. smile

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#5 2012-10-09 16:34:14

WonderWoofy
Member
From: Los Gatos, CA
Registered: 2012-05-19
Posts: 8,412

Re: x86_64 installation won't boot after memory upgrade

Just a shot in the dark, but have you tried switching the positions of the ram modules?

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#6 2012-10-09 18:57:33

biltong
Member
From: South Africa
Registered: 2011-09-01
Posts: 116

Re: x86_64 installation won't boot after memory upgrade

WonderWoofy wrote:

Just a shot in the dark, but have you tried switching the positions of the ram modules?

This, otherwise the extra RAM you put in is likely faulty. I don't think arch is your problem here.

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#7 2012-10-09 19:13:32

spud
Member
From: Australia, NSW
Registered: 2012-10-09
Posts: 4

Re: x86_64 installation won't boot after memory upgrade

I have switched the position of the ram and I have tried each 2gb stick in combination with a 1gb stick and they both work fine like that. It is only when they are together that it fails to boot. What seems odd to me is that Linux Mint will boot into the live DVD and it recognizes all the ram and it passes memtest without error.

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#8 2012-10-09 19:30:17

biltong
Member
From: South Africa
Registered: 2011-09-01
Posts: 116

Re: x86_64 installation won't boot after memory upgrade

Then it's probably a compatibility issue. Mixing RAM manufactured by different companies can cause these kinds of issues, though that is less of an issue these days.

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#9 2012-10-10 05:17:42

spud
Member
From: Australia, NSW
Registered: 2012-10-09
Posts: 4

Re: x86_64 installation won't boot after memory upgrade

Apparently there is some type of incompatibility, but what is incompatible with what? If it did not work with any other distro or if it failed memtest I could just say the ram is bad or incompatible. It still remains a mystery to me.

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#10 2012-10-10 06:28:28

WonderWoofy
Member
From: Los Gatos, CA
Registered: 2012-05-19
Posts: 8,412

Re: x86_64 installation won't boot after memory upgrade

I think the only way to tell is by getting another matching ram module and testing it out.  So for now I would say you are sh*t out of luck... I just cannot think of a better outcome in this case.

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#11 2012-10-10 12:32:45

nomorewindows
Member
Registered: 2010-04-03
Posts: 2,973

Re: x86_64 installation won't boot after memory upgrade

You might try passing mem= to the arch kernel line, to make sure it detects the right amount of RAM.  It may actually be a limitation of the motherboard BIOS that you can't add more than a certain amount of RAM.


I may have to CONSOLE you about your usage of ridiculously easy graphical interfaces...
Look ma, no mouse.

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