[Bug 464817] New: AMD64X2 + 4GB RAM - Aperture pointing to e820 RAM. Ignoring - loss of memory
https://bugzilla.novell.com/show_bug.cgi?id=464817 Summary: AMD64X2 + 4GB RAM - Aperture pointing to e820 RAM. Ignoring - loss of memory Product: openSUSE 11.1 Version: Final Platform: 64bit OS/Version: openSUSE 11.1 Status: NEW Severity: Normal Priority: P5 - None Component: Kernel AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: morgancoxuk@gmail.com QAContact: qa@suse.de Found By: Community User Hi. athlon64 X2 4600 motherboard : gigabyte GA-M55S-S3 2 X 2GB ram Nvidia 8500 PCI-E - latest stable driver I have recently upgraded my desktop from 1GB ram to 4GB. Previous i was getting Aperture beyond 4GB messages, I now get In dmesg it shows:- -------------------------------------------------- Checking aperture... No AGP bridge found Node 0: aperture @ 20000000 size 32 MB Aperture pointing to e820 RAM. Ignoring. Your BIOS doesn't leave a aperture memory hole Please enable the IOMMU option in the BIOS setup This costs you 64 MB of RAM Mapping aperture over 65536 KB of RAM @ 20000000 PCI: MCFG area at f0000000 reserved in E820 -------------------------------------------------- The memory used is not available - i.e i lose 64 MB. Also the nvidia driver seems slower with 4 GB. There is no iommu option in bios, even in advanced (ctrl +f1) . I do not get this in 32bit linux using a kernel compiled with PAE - i can see all my memory. After reading around forums I tried iommu=memaper=3 - what excatly does this do ? I noticed that Aperture was set to 256MB with this option - and I lost the 256MB.. I also notice that if I reduce my memory to 2 or 3 GB (mem=2GB) I do not get that message. After reading around forums I tried adding to the grub kernel line - iommu=memaper=3 - I noticed that Aperture was set to 256MB with this option - and I lost the 256MB.. What should I set my aperture to ? My gfx card is geforce 8500 256mb PCI-E - do i actually use it. I have also noticed that setting iommu=memaper=0 only uses 32MB - if this setting is not needed then it should be set to this ? Is there a way to use all my ram. Any sugestions ? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=464817 User jdluhos@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=464817#c1 Jiri Dluhos <jdluhos@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jdluhos@novell.com --- Comment #1 from Jiri Dluhos <jdluhos@novell.com> 2009-01-09 05:56:29 MST --- I have observed the same problem on one of my computers (a Gigabyte motherboard, 4GB of memory, AMD Phenom X4 processor). I would guess that the motherboard is not able to address more than 4GB of memory, and when that much physical memory is installed, it does not have any unused address space to put the aperture to. But it's just a wild guess. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=464817 User jdluhos@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=464817#c2 Jiri Dluhos <jdluhos@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|bnc-team-screening@forge.provo.novell.com |kernel-maintainers@forge.provo.novell.com --- Comment #2 from Jiri Dluhos <jdluhos@novell.com> 2009-01-09 05:58:27 MST --- Reassigning to the kernel team; they will probably know right away what this is. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=464817 User gregkh@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=464817#c3 Greg Kroah-Hartman <gregkh@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |INVALID --- Comment #3 from Greg Kroah-Hartman <gregkh@novell.com> 2009-01-25 17:52:43 MST --- THis is a bios bug, nothing we can do about this. Please either switch to a 64bit kernel/system, or complain to your manufacturer. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=464817 User morgancoxuk@gmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=464817#c4 --- Comment #4 from morgan cox <morgancoxuk@gmail.com> 2009-01-27 03:42:48 MST --- Hi. I am using a 64bit kernel and 64bit CPU. I have raised a ticket with giga-byte (my MB manufacturer) they sent me a beta bios with memory remapping option , however I still get this message, Does anyone know If I actually use this memory - if not i'll set it to the lowest value as it is reducing my ram . -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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