Qubes 4.0-rc1 installer won't boot

[Jason Holt]

Can't get past grub when booting from USB.

When I select USB stick from boot device menu with secure boot on, screen clears and almost immediately comes back to boot device menu. Disabled secure boot, and now it gets to grub menu, but all 4 options clear screen and immediately come back to boot menu. On perhaps 1 out of 10 tries, it looks like a single line of text might appear during the screen clear, but I haven't been able to catch it (maybe something about qubes 4.0, no more than 30 chars).

Qubes-R4.0-rc1-x86_64.iso installing to 5th gen Lenovo Carbon X1. dd'ed to USB stick correctly (to disk, not partition).

[Jason Holt]

Rebooting in legacy mode allowed me to install, but then it wouldn't boot. Tried the standard fixes listed in the docs, but didn't see how they were supposed to work with 4.0, gave up. Optimistic for the future of qubes, anyway.

[David Hobach]

On 09/04/2017 05:35 AM, Jason Holt wrote:
> Rebooting in legacy mode allowed me to install, but then it wouldn't boot. Tried the standard fixes listed in the docs, but didn't see how they were supposed to work with 4.0, gave up. Optimistic for the future of qubes, anyway.
>

Try modifying the Xen options in grub, in particular try removing
iommu=gpuonly or so.