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.