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add section about removing noexitboot and mapbs

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awokd 2018-05-06 15:43:08 +00:00 committed by GitHub
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troubleshooting/uefi-troubleshooting.md
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@ -143,9 +143,41 @@ Ctrl-Alt-F2), or booting from installation media in "Rescue a Qubes system" mode
efibootmgr -v -c -u -L Qubes -l /EFI/qubes/xen.efi -d /dev/sda -p 1 "placeholder /mapbs /noexitboot"
Installation freezes before getting to Anaconda
-----------------------------------------------
Some systems can freeze with the default UEFI install options.
You can try the following to remove `noexitboot` and `mapbs`.
If you have an Nvidia card, see also [Nvidia Troubleshooting](/doc/nvidia-troubleshooting/#disabling-nouveau).
1. Follow the [steps above](/doc/uefi-troubleshooting/#change-installer-kernel-parameters-in-uefi) to edit the `[qubes-verbose]` section of your installer's `xen.cfg`.
You want to comment out the `mapbs` and `noexitboot` lines.
The end result should look like this:
~~~
[qubes-verbose]
options=console=vga efi=attr=uc
# noexitboot=1
# mapbs=1
kernel=vmlinuz inst.stage2=hd:LABEL=Qubes-R4.0-x86_64 i915.alpha_support=1
ramdisk=initrd.img
~~~
2. Boot the installer and continue to install as normal, but don't reboot the system at the end when prompted.
3. Go to `tty2` (Ctrl-Alt-F2).
4. Use your preferred text editor (`nano` works) to edit `/mnt/sysimage/boot/efi/EFI/qubes/xen.cfg`, verifying the `noexitboot` and `mapbs` lines are not present.
This is also a good time to make permanent any other changes needed to get the installer to work, such as `nouveau.modeset=0`.
For example:
~~~
[4.14.18-1.pvops.qubes.x86_64]
options=loglvl=all dom0_mem=min:1024M dom0_mem=max:4096M iommu=no-igfx ucode=scan efi=attr=uc
~~~
5. Go back to `tty6` (Ctrl-Alt-F6) and click `Reboot`.
6. Continue with setting up default templates and logging in to Qubes.
Installation freezes before getting to Anaconda / disable EFI runtime services
------------------------------------------------------------------------------
On some early, buggy UEFI implementations, you may need to disable EFI under Qubes completely.
This can sometimes be done by switching to legacy mode in your BIOS/UEFI configuration.
If that's not an option there, or legacy mode does not work either, you can try the following to add `efi=no-rs`.