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Merge branch 'yilmi-patch-2'

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Andrew David Wong 2018-02-01 23:42:00 -06:00
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troubleshooting/uefi-troubleshooting.md
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@ -7,6 +7,23 @@ permalink: /doc/uefi-troubleshooting/
Troubleshooting UEFI related problems
========================================
Change installer kernel parameters in UEFI
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If you've installed successfully in legacy mode but had to change some kernel parameters for it to work, you should try installing in UEFI mode with the same parameters.
**Change the xen configuration on a USB media**
01. Attach the usb disk, mount the EFI partition (second partition available on the disk)
02. Edit your xen config (`xen.cfg/BOOTX64.cfg`) changing the `kernel` key to add your kernel parameters on the boot entry of your choice
03. Install using your modified boot entry
**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
Cannot start installation, installation completes successfully but then BIOS loops at boot device selection, hangs at four penguins after choosing "Test media and install Qubes OS" in GRUB menu
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