多个64位版本(Kubuntu、Lubuntu和Xubuntu)一旦安装在我的ThinkPad R60上,就会显示3GB的内存,而不是正确的4GB内存。上周,我拥有了4GB的RAM (与BIOS相匹配),本周我有3GB的可用内存。好奇的人想知道。详情如下:
Linux R60 3.11.0-12-泛型#19-Ubuntu 10月9日16:20:46 UTC 2013 x86_64 GNU/Linux r60
free -m报告:
_ total used free shared buffers cached
Mem: 3001 854 2146 0 22 486
-/+ buffers/cache: 346 2655
Swap: 0 0 0
. . . . . .lshw显示:
description: Notebook
product: 9459AT8 ()
vendor: LENOVO
version: ThinkPad R60/R60i
serial: redacted
width: 64 bits
capabilities: smbios-2.4 dmi-2.4 vsyscall32
configuration: administrator_password=disabled boot=normal chassis=notebook family=ThinkPad R60/R60i frontpanel_password=unknown keyboard_password=disabled power-on_password=disabled uuid=126E4001-48CA-11CB-9D53-B982AE0D1ABB
*-core
description: Motherboard
product: 9459AT8
vendor: LENOVO
physical id: 0
version: Not Available
*-firmware
description: BIOS
vendor: LENOVO
physical id: 0
version: 7CETC1WW (2.11 )
date: 01/09/2007
size: 144KiB
capacity: 1984KiB
capabilities: pci pcmcia pnp upgrade shadowing escd cdboot bootselect socketedrom edd acpi usb biosbootspecification
{snip}
*-memory
description: System Memory
physical id: 29
slot: System board or motherboard
size: 4GiB
*-bank:0
description: SODIMM DDR2 Synchronous
physical id: 0
slot: DIMM 1
size: 2GiB
width: 64 bits
*-bank:1
description: SODIMM DDR2 Synchronous
physical id: 1
slot: DIMM 2
size: 2GiB
width: 64 bitsdpkg -l linux-*返回:
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Description
+++-======================================-=======================================-==========================================================================
un linux-doc-3.2.0 <none> (no description available)
ii linux-firmware 1.79.6 Firmware for Linux kernel drivers
ii linux-generic 3.2.0.52.62 Complete Generic Linux kernel
un linux-headers <none> (no description available)
un linux-headers-3 <none> (no description available)
un linux-headers-3.0 <none> (no description available)
un linux-headers-3.2.0-23 <none> (no description available)
un linux-headers-3.2.0-23-generic <none> (no description available)
ii linux-headers-3.2.0-52 3.2.0-52.78 Header files related to Linux kernel version 3.2.0
ii linux-headers-3.2.0-52-generic 3.2.0-52.78 Linux kernel headers for version 3.2.0 on 64 bit x86 SMP
ii linux-headers-generic 3.2.0.52.62 Generic Linux kernel headers
un linux-image <none> (no description available)
un linux-image-3.0 <none> (no description available)
ii linux-image-3.2.0-52-generic 3.2.0-52.78 Linux kernel image for version 3.2.0 on 64 bit x86 SMP
ii linux-image-generic 3.2.0.52.62 Generic Linux kernel image
un linux-initramfs-tool <none> (no description available)
un linux-kernel-headers <none> (no description available)
un linux-kernel-log-daemon <none> (no description available)
ii linux-libc-dev 3.2.0-52.78 Linux Kernel Headers for development
un linux-restricted-common <none> (no description available)
ii linux-sound-base 1.0.25+dfsg-0ubuntu1.1 base package for ALSA and OSS sound systems
un linux-source-3.2.0 <none> (no description available)
un linux-tools <none> (no description available)发布于 2013-12-02 03:59:30
http://forums.lenovo.com/t5/R-and-L-Series-ThinkPad-Laptops/Lenovo-R60-memory/m-p/127896/highlight/true#M9099在R60中显示了一个BIOS限制,可以阻止超过3GB的可用。我必须混合了另一个ThinkPad (一个SL400)的结果,它确实可以使用4GB。
发布于 2013-10-31 16:23:58
你在测量苹果和橘子。
您的内核仍然可以看到4G内存。free只返回可映射的内存.您有1G内存无法访问。这可能是因为几件事,但我想,更新更新的视频驱动程序和您的卡是“使用”部分的RAM。
您可能需要检查您的内存是否使用BadRam之类的东西“标记为坏”。
最后,您可能希望查看(虽然我不认为是这样),以确保内核不是以一种奇怪的方式映射RAM。
cat /var/log/dmesg | grep -a 40 "BIOS-provided physical RAM map:"
应该让你开始沿着这条路走下去。尽管您可能尝试加载旧内核,如果您做了一个更新和查看。
基本上,你需要找出丢失的记忆在哪里。它就在那里,你的系统看到了,它只是映射到了与你以前不同的东西上。
https://askubuntu.com/questions/364901
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