....hmmm So what could it be that my bios is telling me I have 4 GB installed (what I did) and is telling to the kernel that it could only use 3GB?
the bios has not that much options to play with.... thanks anyway Oliver Andy Whitcroft wrote: > On Wed, Dec 17, 2008 at 10:16:49AM -0000, diefans wrote: >> here is my dmesg output. >> >> ** Attachment added: "dmesg.txt" >> http://launchpadlibrarian.net/20493232/dmesg.txt > > [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009f000 (usable) > [ 0.000000] BIOS-e820: 000000000009f000 - 00000000000a0000 (reserved) > [ 0.000000] BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved) > [ 0.000000] BIOS-e820: 0000000000100000 - 00000000bfed0000 (usable) > [ 0.000000] BIOS-e820: 00000000bfed0000 - 00000000bfedf000 (ACPI data) > [ 0.000000] BIOS-e820: 00000000bfedf000 - 00000000bff00000 (ACPI NVS) > [ 0.000000] BIOS-e820: 00000000bff00000 - 00000000c0000000 (reserved) > [ 0.000000] BIOS-e820: 00000000f0000000 - 00000000f4000000 (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: 00000000ff800000 - 0000000100000000 (reserved) > > This e820 output implies there is not 4GB of ram in this system. > Only the usable sections are literally usable for storage by the kernel. > That is these two, which is memory from 0 to close to 3GB give or take a > few blocks. So the kernel is doing the right thing given the information > it appears to be being given by the BIOS. > > [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009f000 (usable) > [ 0.000000] BIOS-e820: 0000000000100000 - 00000000bfed0000 (usable) > > Compare that to mine, where there is RAM from 4GB to 5GB physical and > all of the reserved areas are actually pulled down below 3GB. > > ] BIOS-e820: 0000000000000000 - 000000000009c400 (usable) > ] BIOS-e820: 0000000000100000 - 00000000bd4a1000 (usable) > ] BIOS-e820: 00000000bd4a7000 - 00000000bd5ba000 (usable) > ] BIOS-e820: 00000000bd60f000 - 00000000bd708000 (usable) > ] BIOS-e820: 00000000bd90f000 - 00000000bd918000 (usable) > ] BIOS-e820: 00000000bd91f000 - 00000000bd963000 (usable) > ] BIOS-e820: 00000000bd99f000 - 00000000bd9e4000 (usable) > ] BIOS-e820: 00000000bd9ff000 - 00000000bda00000 (usable) > ] BIOS-e820: 0000000100000000 - 0000000140000000 (usable) > > Things to look at would include whether you have a BIOS option to shift > the RAM layout to keep the 3GB-4GB range free. Typically IO space and > the AGP aperture get dropped in there, which can wack a huge chunk of > ram. Not that I see that being mentioned in your dmesg. > -- Trouble viewing beyond 3GB of available 4GB memory using 64bit kernel https://bugs.launchpad.net/bugs/114258 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
