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Date: Thu, 11 Jun 2009 11:59:59 +0100 From: Matthew Garrett <mjg59@...f.ucam.org> To: "Trenton D. Adams" <trenton.d.adams@...il.com> Cc: Robert Hancock <hancockrwd@...il.com>, Yinghai Lu <yhlu.kernel@...il.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: Macbook 4G only see 3G On Wed, Jun 10, 2009 at 10:48:00PM -0600, Trenton D. Adams wrote: > On Wed, Jun 10, 2009 at 10:23 PM, Robert Hancock<hancockrwd@...il.com> wrote: > > Your dmesg shows your chiset is 945GM. > > == > > intelfb 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 > > intelfb: 00:02.0: Intel(R) 945GM, aperture size 256MB, stolen memory 16124kB > > intelfb: Non-CRT device is enabled ( LVDS port ). Disabling mode switching. > > intelfb: Video mode must be programmed at boot time. > > == > > As far as I can found in English/Japanese forum, 945GM/PM? series can't handle > > 4G memory. (Then, 64bit Vista can't handle it, either) > > That's my graphics card though, not my motherboard chipset. The > chipset is ICH7. ICH7 is the southbridge. 945 is the northbridge and includes the memory controller. It can only access 4GB of address space, which includes PCI and any other memory mapped resources. This means that it's not possible to use 4GB of RAM. -- Matthew Garrett | mjg59@...f.ucam.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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