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Generalize ISO offset instructions

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Andrew David Wong 2021-03-10 21:35:28 -08:00
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user/troubleshooting/uefi-troubleshooting.md
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@ -21,10 +21,11 @@ If you've installed successfully in legacy mode but had to change some kernel pa
**Change xen configuration directly in an iso image**
01. Get EFI partition boundaries `parted Qubes-R4.0-rc4-x86_64.iso unit B print`
02. Using the start address and the size of the EFI partition, setup a loop device for it `sudo losetup -o 524288 --sizelimit 30562304 /dev/loop0 Qubes-R4.0-rc4-x86_64.iso`
03. Mount the loop device `sudo mount /dev/loop0 /mnt`
04. Edit `EFI/BOOT/BOOTX64.cfg` to add your params to the `kernel` configuration key
05. Save your changes, unmount and dd to usb device
02. Find the offset for your ISO (see [here](https://unix.stackexchange.com/questions/270171/why-offset-specific-in-loop-mount)).
03. Using the start address and the size of the EFI partition, setup a loop device for it. This depends on the offset you found in the previous step and is specific to your ISO. Here is an example command using a specific Qubes ISO (if your ISO is different, you will have to adjust the command accordingly): `sudo losetup -o 524288 --sizelimit 30562304 /dev/loop0 Qubes-R4.0-rc4-x86_64.iso`
04. Mount the loop device `sudo mount /dev/loop0 /mnt`
05. Edit `EFI/BOOT/BOOTX64.cfg` to add your params to the `kernel` configuration key
06. Save your changes, unmount and dd to usb device
## Installation freezes before displaying installer ##