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Laptop detects only part of the RAM memory
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Laptop detects only part of the RAM memory
by Jonas Andradas
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Hello,
last week, when booting a virtual machine, I discovered that my laptop only recognizes one of the RAM modules (supposed to be 1 GB, but truly providing 880 MB). I realized this when VirtualBox complained that I had configured more than the available RAM to the virtual machine. I had not changed the virtual machine configuration, and the virtual machine had about 950 MB assigned (and my physical host, only had 880 MB). Since I previously had 2 GB of RAM, I assumed one of the chips was broken somehow. I replaced one of them, and I still got this output for the "free" command: $ free total used free shared buffers cached Mem: 902264 892608 9656 0 23624 621432 So I put the original module back on, and changed the other one. I entered the BIOS, and it detected 2048 MB of RAM. I run a test on the memory (from the BIOS), and everything seemed allright. But my Debian keeps seeing only 902264 of RAM. I downloaded a new Kernel, re-compiled, but everything is still the same. I am running Debian Sid, if that could matter, but I can't see how that would affect the amount of RAM available. Running lshw, I get the following ouput: *-memory description: System Memory physical id: a slot: System board or motherboard size: 2GiB *-bank:0 description: SODIMM DDR2 Synchronous 533 MHz (1.9 ns) product: 9905293-014.A00LF vendor: 7F98000000000000 physical id: 0 serial: 41CC9DE7 slot: DIMM #1 size: 1GiB width: 64 bits clock: 533MHz (1.9ns) *-bank:1 description: SODIMM DDR2 Synchronous 667 MHz (1.5 ns) product: 9905295-066.A00LF vendor: 7F98000000000000 physical id: 1 serial: 66078142 slot: DIMM #2 size: 1GiB width: 64 bits clock: 667MHz (1.5ns) Could the difference between the clocks available on the RAM chips only allow for one of them to be used? Thank you in advance, Best Regards, -- Jonás Andradas Skype: jontux LinkedIn: http://www.linkedin.com/in/andradas GPG Fingerprint: 678F 7BD0 83C3 28CE 9E8F 3F7F 4D87 9996 E0C6 9372 Keyservers: pgp.mit.edu | pgp.rediris.es |
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Re: Laptop detects only part of the RAM memory
by Aioanei Rares
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j.andradas@... wrote:
> Hello, > > last week, when booting a virtual machine, I discovered that my laptop > only recognizes one of the RAM modules (supposed to be 1 GB, but truly > providing 880 MB). I realized this when VirtualBox complained that I > had configured more than the available RAM to the virtual machine. I > had not changed the virtual machine configuration, and the virtual > machine had about 950 MB assigned (and my physical host, only had 880 MB). > > Since I previously had 2 GB of RAM, I assumed one of the chips was > broken somehow. I replaced one of them, and I still got this output > for the "free" command: > > $ free > total used free shared buffers > cached > Mem: 902264 892608 9656 0 23624 621432 > > > So I put the original module back on, and changed the other one. I > entered the BIOS, and it detected 2048 MB of RAM. I run a test on > the memory (from the BIOS), and everything seemed allright. But my > Debian keeps seeing only 902264 of RAM. > > I downloaded a new Kernel, re-compiled, but everything is still the > same. I am running Debian Sid, if that could matter, but I can't see > how that would affect the amount of RAM available. > > Running lshw, I get the following ouput: > > *-memory > description: System Memory > physical id: a > slot: System board or motherboard > size: 2GiB > *-bank:0 > description: SODIMM DDR2 Synchronous 533 MHz (1.9 ns) > product: 9905293-014.A00LF > vendor: 7F98000000000000 > physical id: 0 > serial: 41CC9DE7 > slot: DIMM #1 > size: 1GiB > width: 64 bits > clock: 533MHz (1.9ns) > *-bank:1 > description: SODIMM DDR2 Synchronous 667 MHz (1.5 ns) > product: 9905295-066.A00LF > vendor: 7F98000000000000 > physical id: 1 > serial: 66078142 > slot: DIMM #2 > size: 1GiB > width: 64 bits > clock: 667MHz (1.5ns) > > > Could the difference between the clocks available on the RAM chips > only allow for one of them to be used? > > Thank you in advance, > > Best Regards, > > -- > Jonás Andradas > > Skype: jontux > LinkedIn: http://www.linkedin.com/in/andradas > GPG Fingerprint: 678F 7BD0 83C3 28CE 9E8F > 3F7F 4D87 9996 E0C6 9372 > Keyservers: pgp.mit.edu | pgp.rediris.es > -- To UNSUBSCRIBE, email to debian-laptop-REQUEST@... with a subject of "unsubscribe". Trouble? Contact listmaster@... |
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Re: Laptop detects only part of the RAM memory
by Harry Rickards
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1 On 27/09/09 14:57, Aioanei Rares wrote: > j.andradas@... wrote: >> Hello, >> >> last week, when booting a virtual machine, I discovered that my laptop >> only recognizes one of the RAM modules (supposed to be 1 GB, but truly >> providing 880 MB). I realized this when VirtualBox complained that I >> had configured more than the available RAM to the virtual machine. I >> had not changed the virtual machine configuration, and the virtual >> machine had about 950 MB assigned (and my physical host, only had 880 >> MB). >> >> Since I previously had 2 GB of RAM, I assumed one of the chips was >> broken somehow. I replaced one of them, and I still got this output >> for the "free" command: >> >> $ free >> total used free shared buffers >> cached >> Mem: 902264 892608 9656 0 23624 621432 >> >> >> So I put the original module back on, and changed the other one. I >> entered the BIOS, and it detected 2048 MB of RAM. I run a test on >> the memory (from the BIOS), and everything seemed allright. But my >> Debian keeps seeing only 902264 of RAM. >> >> I downloaded a new Kernel, re-compiled, but everything is still the >> same. I am running Debian Sid, if that could matter, but I can't see >> how that would affect the amount of RAM available. >> >> Running lshw, I get the following ouput: >> >> *-memory >> description: System Memory >> physical id: a >> slot: System board or motherboard >> size: 2GiB >> *-bank:0 >> description: SODIMM DDR2 Synchronous 533 MHz (1.9 ns) >> product: 9905293-014.A00LF >> vendor: 7F98000000000000 >> physical id: 0 >> serial: 41CC9DE7 >> slot: DIMM #1 >> size: 1GiB >> width: 64 bits >> clock: 533MHz (1.9ns) >> *-bank:1 >> description: SODIMM DDR2 Synchronous 667 MHz (1.5 ns) >> product: 9905295-066.A00LF >> vendor: 7F98000000000000 >> physical id: 1 >> serial: 66078142 >> slot: DIMM #2 >> size: 1GiB >> width: 64 bits >> clock: 667MHz (1.5ns) >> >> >> Could the difference between the clocks available on the RAM chips >> only allow for one of them to be used? >> Thank you in advance, >> >> Best Regards, >> >> -- >> Jonás Andradas >> >> Skype: jontux >> LinkedIn: http://www.linkedin.com/in/andradas >> GPG Fingerprint: 678F 7BD0 83C3 28CE 9E8F >> 3F7F 4D87 9996 E0C6 9372 >> Keyservers: pgp.mit.edu | pgp.rediris.es >> > Please post the output of your dmesg. > > Thanks Harry Rickards <hrickards@...> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iJwEAQECAAYFAkq+MfUACgkQ+9DWHFhEn2/kwwQAlcNfsn2wUAoJUuWWpJOtcvQY vAVD1Wcu/VpQG3RsLruKOZ8g9PvQhImqVj838xmc1eyb2uiotl95+HCwVEtT9QfV Gms6e24N1whV8atu6wEXWfYjE+7/GtUcL5MqavADUglwf4GY8ivQGe9zjm5i5ZNu oXhbkjzUbmoIVE0fmro= =gWng -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to debian-laptop-REQUEST@... with a subject of "unsubscribe". Trouble? Contact listmaster@... |
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Re: Laptop detects only part of the RAM memory
by Jonas Andradas
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On Sat, Sep 26, 2009 at 17:23, Harry RIckards <hrickards@...> wrote: -----BEGIN PGP SIGNED MESSAGE----- Thank you for your replies. Below is the output of "uname -a", and attached is the file "dmesg.txt", obtained by running "dmesg > dmesg.log" ~$ dmesg > /tmp/dmesg.log ~$ uname -a Linux porjoaa 2.6.31 #2 SMP PREEMPT Sun Sep 20 03:15:53 CEST 2009 i686 GNU/Linux I am having some issues attaching the file, so I am posting it at "http://jonas.andradas.es/dmesg.log" Thank you very much again, Regards, -- Jonás Andradas Skype: jontux LinkedIn: http://www.linkedin.com/in/andradas GPG Fingerprint: 678F 7BD0 83C3 28CE 9E8F 3F7F 4D87 9996 E0C6 9372 Keyservers: pgp.mit.edu | pgp.rediris.es |
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Re: Laptop detects only part of the RAM memory
by Jonas Andradas
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Sorry for top-posting. It's the only option from my mobile. I think I might have the root of the problem: I have the Kernel configuration parameter of Highmem to off, as I have less than 4 GB. But from the help found in kernel config, I have read that if the available RAM is between 1 and 3 GB, it should be set to "4GB" I am currently recompiling the Kernel and will submit my results when I boot back up. Thank you once again, Regards, Jonás El 26/09/2009 19:11, "Jonas Andradas" <j.andradas@...> escribió: |
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Re: Laptop detects only part of the RAM memory
by Alex Hieronymi
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Aioanei Rares wrote:
> j.andradas@... wrote: >> Hello, >> >> last week, when booting a virtual machine, I discovered that my >> laptop only recognizes one of the RAM modules (supposed to be 1 GB, >> but truly providing 880 MB). I realized this when VirtualBox >> complained that I had configured more than the available RAM to the >> virtual machine. I had not changed the virtual machine >> configuration, and the virtual machine had about 950 MB assigned (and >> my physical host, only had 880 MB). >> >> Since I previously had 2 GB of RAM, I assumed one of the chips was >> broken somehow. I replaced one of them, and I still got this output >> for the "free" command: >> >> $ free >> total used free shared >> buffers cached >> Mem: 902264 892608 9656 0 23624 >> 621432 >> >> >> So I put the original module back on, and changed the other one. I >> entered the BIOS, and it detected 2048 MB of RAM. I run a test on >> the memory (from the BIOS), and everything seemed allright. But my >> Debian keeps seeing only 902264 of RAM. >> >> I downloaded a new Kernel, re-compiled, but everything is still the >> same. I am running Debian Sid, if that could matter, but I can't see >> how that would affect the amount of RAM available. >> >> Running lshw, I get the following ouput: >> >> *-memory >> description: System Memory >> physical id: a >> slot: System board or motherboard >> size: 2GiB >> *-bank:0 >> description: SODIMM DDR2 Synchronous 533 MHz (1.9 ns) >> product: 9905293-014.A00LF >> vendor: 7F98000000000000 >> physical id: 0 >> serial: 41CC9DE7 >> slot: DIMM #1 >> size: 1GiB >> width: 64 bits >> clock: 533MHz (1.9ns) >> *-bank:1 >> description: SODIMM DDR2 Synchronous 667 MHz (1.5 ns) >> product: 9905295-066.A00LF >> vendor: 7F98000000000000 >> physical id: 1 >> serial: 66078142 >> slot: DIMM #2 >> size: 1GiB >> width: 64 bits >> clock: 667MHz (1.5ns) >> >> >> Could the difference between the clocks available on the RAM chips >> only allow for one of them to be used? >> Thank you in advance, >> >> Best Regards, >> >> -- >> Jonás Andradas >> >> Skype: jontux >> LinkedIn: http://www.linkedin.com/in/andradas >> GPG Fingerprint: 678F 7BD0 83C3 28CE 9E8F >> 3F7F 4D87 9996 E0C6 9372 >> Keyservers: pgp.mit.edu | pgp.rediris.es >> > Please post the output of your dmesg. > > "shared" video memory? -- To UNSUBSCRIBE, email to debian-laptop-REQUEST@... with a subject of "unsubscribe". Trouble? Contact listmaster@... |
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Re: Laptop detects only part of the RAM memory
by Imre Vida-3
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hi may be a very trivial question, but have you switched to 4 GB under "Processor type and features/High Memory Support" in the kernel config? imre On Sat, Sep 26, 2009 at 03:44:15PM +0200, j.andradas@... wrote: > Hello, > > last week, when booting a virtual machine, I discovered that my laptop > only recognizes one of the RAM modules (supposed to be 1 GB, but truly > providing 880 MB). I realized this when VirtualBox complained that I had > configured more than the available RAM to the virtual machine. I had not > changed the virtual machine configuration, and the virtual machine had > about 950 MB assigned (and my physical host, only had 880 MB). > > Since I previously had 2 GB of RAM, I assumed one of the chips was broken > somehow. I replaced one of them, and I still got this output for the > "free" command: > > $ free > total used free shared buffers > cached > Mem: 902264 892608 9656 0 23624 621432 > > So I put the original module back on, and changed the other one. I > entered the BIOS, and it detected 2048 MB of RAM. I run a test on the > memory (from the BIOS), and everything seemed allright. But my Debian > keeps seeing only 902264 of RAM. > > I downloaded a new Kernel, re-compiled, but everything is still the same. > I am running Debian Sid, if that could matter, but I can't see how that > would affect the amount of RAM available. > > Running lshw, I get the following ouput: > > *-memory > description: System Memory > physical id: a > slot: System board or motherboard > size: 2GiB > *-bank:0 > description: SODIMM DDR2 Synchronous 533 MHz (1.9 ns) > product: 9905293-014.A00LF > vendor: 7F98000000000000 > physical id: 0 > serial: 41CC9DE7 > slot: DIMM #1 > size: 1GiB > width: 64 bits > clock: 533MHz (1.9ns) > *-bank:1 > description: SODIMM DDR2 Synchronous 667 MHz (1.5 ns) > product: 9905295-066.A00LF > vendor: 7F98000000000000 > physical id: 1 > serial: 66078142 > slot: DIMM #2 > size: 1GiB > width: 64 bits > clock: 667MHz (1.5ns) > > Could the difference between the clocks available on the RAM chips only > allow for one of them to be used? > > Thank you in advance, > > Best Regards, > > -- > Jonás Andradas > > Skype: jontux > LinkedIn: http://www.linkedin.com/in/andradas > GPG Fingerprint: 678F 7BD0 83C3 28CE 9E8F > 3F7F 4D87 9996 E0C6 9372 > Keyservers: pgp.mit.edu | pgp.rediris.es -- Imre Vida, M.D., Ph.D. Division of Neuroscience and Biomedical Systems IBLS, University of Glasgow West Medical Building Glasgow, G12 8QQ, U.K. Tel.: 0044 141 330 5143 Fax.: 0044 141 330 5481 eMail: i.vida@... -- -- To UNSUBSCRIBE, email to debian-laptop-REQUEST@... with a subject of "unsubscribe". Trouble? Contact listmaster@... |
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Re: Laptop detects only part of the RAM memory
by Jonas Andradas
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On Mon, Sep 28, 2009 at 02:10, Alex Hieronymi <alex@...> wrote:
Hello, I have solved the problem. When prompted for dmesg output, I saw that "NOHIGHMEM" was present. I re-checked the Kernel configuration and documentation and, indeed, I had NOHIGHMEM set. I know I previously had this option set to "4GB", because I previously did see my 2 GB of RAM. At some point, which I can't recall, I must have used a fresh .config or changed that option without noticing. Probably even if I saw "NOHIGHMEM", I wasn't worried at all, since I thought that the "4GB" option was only needed if you had more than 4GB, and the "64GB" option only if the system had more than that RAM. But, reading the docs, I saw that, NOHIGHMEM is for systems with less thatn 1 GB of RAM, and for systems between 1 and 3 GB, the "4GB" option must be used. I changed that, I recompiled, and everything works great. Thank you very much for your help and prompt responses.
No, my on-board graphics card does not have that feature. As I said before, somehow I had changed my Kernelconfig, and was using the "nohighmem" option, instead of the correct "4GB" option, as I have between 1 and 3 GB of RAM. Best Regards, -- Jonás Andradas Skype: jontux LinkedIn: http://www.linkedin.com/in/andradas GPG Fingerprint: 678F 7BD0 83C3 28CE 9E8F 3F7F 4D87 9996 E0C6 9372 Keyservers: pgp.mit.edu | pgp.rediris.es |
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Re: Laptop detects only part of the RAM memory
by Jonas Andradas
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On Mon, Sep 28, 2009 at 08:33, Imre Vida <I.Vida@...> wrote:
Hello Imre, indeed, I had *not* switched to 4 GB. It was very trivial, and in the past I did had 4GB set. At some point I must have changed it (I don't recall doing it, but I did it anyway), and since I previously had it set to 4GB, I did not think of that. Then, probably, even if I saw it, I overlooked it, since I mistakenly thought that the 4GB setting was for 4GB or more. Once I set the switch to 4 GB all my RAM "returned" ;) Thank you for your reply. Regards, Jonás.
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