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On Mon, Jun 14, 2021 at 12:20:44AM +0100, Neil Bothwick wrote |
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> On Sun, 13 Jun 2021 18:57:49 -0400, Walter Dnes wrote: |
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> |
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> /etc/default/grub is only used when you call grub-mkconfig. |
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> |
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> > 1) Is "insmod extfs3" necessary? I've built extfs3 into the kernels. |
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> |
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> If the kernel is on an ext3 filesystem, yes. This is GRUB's module, it |
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> uses it to read an ext3 filesystem in order to load the kernel. |
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Some confusion here. "fdisk -l" on my new machine gives... |
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Device Start End Sectors Size Type |
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/dev/sda1 2048 526335 524288 256M EFI System |
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/dev/sda2 526336 1886416303 1885889968 899.3G Linux filesystem |
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/dev/sda3 1886418352 1953523119 67104768 32G Linux filesystem |
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The EFI Systen partition is fat32. The web examples I read show |
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"insmod <filesystem>" matching the filesystem of the linux system being |
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booted. But all entries in grub.cfg on my new machine are "insmod fat". |
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I wonder if the web documentation was referring to BIOS-booting machines. |
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grub.cfg would be sitting on an xfs or extfs3 or whatever file system, |
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and would need to read it off that filesystem. |
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I have a UEFI system which demands a fat32 boot partition. Since grub |
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and the kernels are sitting on a fat32 partition, my machine needs |
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"insmod fat". |
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Things that make you go hmmmm... |
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* you need to put "insmod fat" in grub.cfg to tell grub that the kernels |
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are sitting on a fat32 partition |
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* but grub has to first read grub.cfg on the fat32 partition before it |
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knows that it must read a fat32 partition |
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I wonder if this is due to the verbose automagic configuration. I |
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also noticed that all menuentries on my machine contain "insmod gzio |
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and "insmod part_gpt", so I'm including them here. Here is my proposed |
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grub.cfg. If anybody sees any problems, please let me know. Otherwise, |
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I'll try the following tomorrow on the new machine... |
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======================================================================== |
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set timeout_style=menu |
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set timeout=15 |
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insmod vga |
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set gfxpayload=640x480 |
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insmod gzio |
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insmod part_gpt |
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insmod fat |
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set root='hd0,gpt1' |
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menuentry 'Linux Experimental' --class gnu-linux { |
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linux /vmlinuz-experimental root=/dev/sda2 ro noexec=on net.ifnames=0 intel_pstate=disable ipv6.disable=1 |
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} |
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menuentry 'Linux Experimental Recovery' --class gnu-linux { |
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linux /vmlinuz-experimental root=/dev/sda2 ro |
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} |
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menuentry 'Linux Production' --class gnu-linux { |
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linux /vmlinuz-production root=/dev/sda2 ro noexec=on net.ifnames=0 intel_pstate=disable ipv6.disable=1 |
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} |
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menuentry 'Linux Production Recovery' --class gnu-linux { |
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linux /vmlinuz-production root=/dev/sda2 ro |
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} |
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-- |
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Walter Dnes <waltdnes@××××××××.org> |
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I don't run "desktop environments"; I run useful applications |
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