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diff --git a/docs/howtos/grub_boot_installer.html b/docs/howtos/grub_boot_installer.html index 9cd05ac..3886f34 100644 --- a/docs/howtos/grub_boot_installer.html +++ b/docs/howtos/grub_boot_installer.html @@ -21,87 +21,108 @@ <h1>Boot a GNU/Linux installer on USB</h1> <aside>Or <a href="../index.html">back to main index</a></aside> </header> - <h2>How to boot from USB</h2> - <p> - Connect the USB drive. Check dmesg:<br/> - <b>$ dmesg</b> - </p> + + <h2>Prepare the USB drive (in GNU/Linux)</h2> + <p> - Check that it wasn't automatically mounted. If it was, unmount it. For example:<br/> - <b>$ sudo umount /dev/sdb1</b><br/> - <b># umount /dev/sdb1</b> + Connect the USB drive. Check dmesg:<br/> + <b>$ dmesg</b><br/> + + Check lsblk to confirm which drive it is:<br/> + <b>$ lsblk</b> </p> + <p> - dmesg told you what device it is. Overwrite the drive, writing your distro ISO to it with dd. For example:<br/> - <b>$ sudo dd if=gnulinux.iso of=/dev/sdb bs=8M; sync</b><br/> - <b># dd if=gnulinux.iso of=/dev/sdb bs=8M; sync</b> + Check that it wasn't automatically mounted. If it was, unmount it. For example:<br/> + <b>$ sudo umount /dev/sdb1</b><br/> + <b># umount /dev/sdb1</b> </p> + <p> - Boot it in GRUB using the "Parse ISOLINUX config (USB)" option (it's in default libreboot grub.cfg, at least). + dmesg told you what device it is. Overwrite the drive, writing your distro ISO to it with dd. For example:<br/> + <b>$ sudo dd if=gnulinux.iso of=/dev/sdb bs=8M; sync</b><br/> + <b># dd if=gnulinux.iso of=/dev/sdb bs=8M; sync</b> </p> + + <h2>Booting the USB drive (in GRUB)</h2> + <p> - If the ISOLINUX parser won't work, then press C to get to GRUB command line.<br/> - <b>ls</b><br/> - Get the device from above output, eg (usb0). Example:<br/> - <b>cat (usb0)/isolinux/isolinux.cfg</b><br/> - Either this will show the ISOLINUX menuentries for that ISO, or link to other .cfg files, for example /isolinux/foo.cfg.<br/> - If it did that, then you do:<br/> - <b>cat (usb0)/isolinux/foo.cfg</b><br/> - And so on, until you find the correct menuentries for ISOLINUX. + Boot it in GRUB using the <i>Parse ISOLINUX config (USB)</i> option (it's in default libreboot grub.cfg, at least). + + A new menu should appear in GRUB, showing the boot options for that distro; this is a GRUB menu, converted from the usual + ISOLINUX menu provided by that distro. </p> + <p> - Now look at the ISOLINUX menuentry. It'll look like:<br/> - <pre> - kernel /path/to/kernel - append PARAMETERS initrd=/path/to/initrd MAYBE_MORE_PARAMETERS - </pre> - GRUB works the same way, but in it's own way. Example GRUB commands:<br/> - <b>linux (usb0)/path/to/kernel PARAMETERS MAYBE_MORE_PARAMETERS</b><br/> - <b>initrd (usb0)/path/to/initrd</b><br/> - <b>boot</b><br/> - Of course this will vary from distro to distro. If you did all that correctly, it should now be booting the ISO - the way you specified. - </p> + If the ISOLINUX parser won't work, then press C to get to GRUB command line.<br/> + grub> <b>ls</b><br/> - <h1>Troubleshooting</h1> + Get the device from above output, eg (usb0). Example:<br/> + grub> <b>cat (usb0)/isolinux/isolinux.cfg</b><br/> - <p> - Most of these issues occur when using libreboot with coreboot's 'text mode' instead of the coreboot framebuffer. - This mode is useful for booting payloads like memtest86+ which expect text-mode, but for GNU/Linux distributions - it can be problematic when they are trying to switch to a framebuffer because it doesn't exist. - </p> + Either this will show the ISOLINUX menuentries for that ISO, or link to other .cfg files, for example /isolinux/foo.cfg.<br/> - <p> - In most cases, you should use the vesafb ROM's. Example filename: libreboot_ukdvorak_vesafb.rom. - </p> + If it did that, then you do:<br/> + grub> <b>cat (usb0)/isolinux/foo.cfg</b><br/> - <h2>parabola won't boot in text-mode</h2> + And so on, until you find the correct menuentries for ISOLINUX. + </p> - <p> - Use one of the ROM images with vesafb in the filename (uses coreboot framebuffer instead of text-mode). - </p> + <p> + Now look at the ISOLINUX menuentry. It'll look like:<br/> + <b> + kernel /path/to/kernel<br/> + append PARAMETERS initrd=/path/to/initrd MAYBE_MORE_PARAMETERS<br/> + </b> + + GRUB works the same way, but in it's own way. Example GRUB commands:<br/> + grub> <b>linux (usb0)/path/to/kernel PARAMETERS MAYBE_MORE_PARAMETERS</b><br/> + grub> <b>initrd (usb0)/path/to/initrd</b><br/> + grub> <b>boot</b><br/> + + Of course this will vary from distro to distro. If you did all that correctly, it should now be booting the ISO + the way you specified. + </p> - <h2>debian-installer (trisquel net install) graphical corruption in text-mode</h2> - <p> - When using the ROM images that use coreboot's "text mode" instead of the coreboot framebuffer, - booting the Trisquel net installer results in graphical corruption because it is trying to switch to a framebuffer which doesn't - exist. Use that kernel parameter on the 'linux' line when booting it:<br/> - <b>vga=normal fb=false</b> - </p> + <h1>Troubleshooting</h1> - <p> - Tested in Trisquel 6 (and 7). This forces debian-installer to start in text-mode, instead of trying to switch to a framebuffer. - </p> + <p> + Most of these issues occur when using libreboot with coreboot's 'text mode' instead of the coreboot framebuffer. + This mode is useful for booting payloads like memtest86+ which expect text-mode, but for GNU/Linux distributions + it can be problematic when they are trying to switch to a framebuffer because it doesn't exist. + </p> - <p> - If selecting text-mode from a GRUB menu created using the ISOLINUX parser, you can press E on the menu entry to add this. - Or, if you are booting manually (from GRUB terminal) then just add the parameters. - </p> + <p> + In most cases, you should use the vesafb ROM's. Example filename: libreboot_ukdvorak_vesafb.rom. + </p> - <p> - This workaround was found on the page: <a href="https://www.debian.org/releases/stable/i386/ch05s04.html">https://www.debian.org/releases/stable/i386/ch05s04.html</a>. - It should also work for gNewSense, Debian and any other apt-get distro that provides debian-installer (text mode) net install method. - </p> + <h2>parabola won't boot in text-mode</h2> + + <p> + Use one of the ROM images with vesafb in the filename (uses coreboot framebuffer instead of text-mode). + </p> + + <h2>debian-installer (trisquel net install) graphical corruption in text-mode</h2> + <p> + When using the ROM images that use coreboot's "text mode" instead of the coreboot framebuffer, + booting the Trisquel net installer results in graphical corruption because it is trying to switch to a framebuffer which doesn't + exist. Use that kernel parameter on the 'linux' line when booting it:<br/> + <b>vga=normal fb=false</b> + </p> + + <p> + Tested in Trisquel 6 (and 7). This forces debian-installer to start in text-mode, instead of trying to switch to a framebuffer. + </p> + + <p> + If selecting text-mode from a GRUB menu created using the ISOLINUX parser, you can press E on the menu entry to add this. + Or, if you are booting manually (from GRUB terminal) then just add the parameters. + </p> + + <p> + This workaround was found on the page: <a href="https://www.debian.org/releases/stable/i386/ch05s04.html">https://www.debian.org/releases/stable/i386/ch05s04.html</a>. + It should also work for gNewSense, Debian and any other apt-get distro that provides debian-installer (text mode) net install method. + </p> <hr/> |