Lennart Sorensen wrote: > On Tue, Jul 21, 2009 at 12:08:58AM +0400, James Brown wrote: > >> I have a laptop Acer TravelMate 3043WTMi under Lenny AMD64 with 4GD RAM. >> But the system "see" only 3GB: >> dmesg |grep Memory >> [ 0.004000] Memory: 3081184k/3136000k available (2225k kernel code, >> 54428k reserved, 1080k data, 392k init) >> $ cat /proc/meminfo >> MemTotal: 3088108 kB >> >> How can I get all my 4GB memory? >> > > Could you get the output of dmesg? It would tell us exactly what the > BIOS reports for memory. Many older chipsets did not support remapping of > memory, so whatever area of the memory space PCI requried was simply lost. > > Something like this is the key part: > BIOS-provided physical RAM map: > BIOS-e820: 0000000000000000 - 000000000009ac00 (usable) > BIOS-e820: 000000000009ac00 - 00000000000a0000 (reserved) > BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) > BIOS-e820: 0000000000100000 - 00000000bffc7440 (usable) > BIOS-e820: 00000000bffc7440 - 00000000bffceac0 (ACPI data) > BIOS-e820: 00000000bffceac0 - 00000000c0000000 (reserved) > BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) > BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved) > BIOS-e820: 0000000100000000 - 0000000240000000 (usable) > > ~$ dmesg | grep BIOS [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009f800 (usable) [ 0.000000] BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved) [ 0.000000] BIOS-e820: 0000000000100000 - 00000000bf680000 (usable) [ 0.000000] BIOS-e820: 00000000bf680000 - 00000000bf700000 (ACPI NVS) [ 0.000000] BIOS-e820: 00000000bf700000 - 00000000c0000000 (reserved) [ 0.000000] BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) [ 0.000000] BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) [ 0.000000] BIOS-e820: 00000000fed00000 - 00000000fed00400 (reserved) [ 0.000000] BIOS-e820: 00000000fed14000 - 00000000fed1a000 (reserved) [ 0.000000] BIOS-e820: 00000000fed1c000 - 00000000fed90000 (reserved) [ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) [ 0.000000] BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved) [ 0.000000] ACPI: BIOS bug: multiple APIC/MADT found, using 0 [ 0.000000] early res: 0 [0-fff] BIOS data page [ 0.000000] early res: 4 [9f800-fffff] BIOS reserved [ 0.004000] Calgary: detecting Calgary via BIOS EBDA area [ 0.264998] ACPI: BIOS _OSI(Linux) query ignored via DMI
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