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On Wednesday, May 04, 2016 09:58:37 AM John Blinka wrote: |
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> Hello, Gentooers: |
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> |
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> I have a new Dell 17 5759 with core i5-6200U skylake cpu on which I'm |
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> trying to dual boot windows 10 and gentoo. All the rest of my gentoo |
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> hardware is much older, so this new laptop introduces 2 technologies new to |
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> me: uefi and 64 bit kernels. |
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> |
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> I installed gentoo using the x86 handbook and a recent sysrescuecd usb |
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> drive. The install was unremarkable except for trying to build a 64 bit |
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> kernel. No matter what I do, the kernel build fails very early with the |
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> message: |
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> |
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> kernel/bounds.c:1:0 error: CPU you selected does not support x86-64 |
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> instruction set. |
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> |
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> Looking at bounds.c does not enlighten me. |
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> |
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> I've tried specifying a 64 bit kernel in various ways: |
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> |
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> setting CONFIG_64BIT=y and CONFIG_X86_64=y via make menuconfig, |
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> |
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> make defconfig, which claims it uses an x86_64_defconfig, and sets the 2 |
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> configuration variables above to "y", |
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> |
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> and genkernel, which says it's getting arch-specific config.sh from |
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> /usr/share/genkernel/arch/x86_64/config.sh, which also sets the 2 variables |
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> above to "y". |
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> |
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> So, a 64 bit sysrescuecd kernel does run on this box, and its /proc/cpuinfo |
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> tells me that it does indeed have a core i5-6200U cpu which, per Google, |
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> does support the x86-64 instruction set. I believe I've told the kernel |
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> make system that I want a 64 bit kernel and that the cpu I want to run it |
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> on supports the x86-64 instruction set. Not trusting my kernel config |
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> knowledge, I've tried letting clean kernel installations produce a 64 bit |
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> kernel configuration for me via make defconfig and genkernel, both of which |
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> appear to be attempting 64 bit configurations. All of these attempts fail |
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> the same way. I've tried all of this on gentoo-sources-4.4.6 and |
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> -4.1.15-r1. |
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> |
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> Any help would be greatly appreciated. Thanks! |
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|
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You should use the AMD64 handbook, not the x86 handbook, if you're trying to |
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install on x86_64 hardware. |
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|
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https://wiki.gentoo.org/wiki/Handbook:AMD64 |
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|
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More importantly, you should be booted into a 64-bit environment. That means |
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using a 64-bit live image for your initial boot, and using an amd64 stage3. |
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|
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EFI has similar requirements; you'll need to be booted via EFI in the first |
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place in order to set up the bootloader properly; your firmware won't make the |
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necessary hardware calls available to register your bootloader if you're not |
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booted in EFI mode. |
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|
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HTH. |
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|
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-- |
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:wq |
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