SecureBoot support enabled causes only low resolutions to be available and makes most live CD unusable

ventoy / Ventoy

A new bootable USB solution.

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SecureBoot support enabled causes only low resolutions to be available and makes most live CD unusable #502

Open rossengeorgiev opened 4 years ago

rossengeorgiev commented 4 years ago

Hi, while I am able to successfully boot iso (ubuntu, winpe), I end up in stupidly low resolutions. 640x480 or 800x600. That makes many GUI unusable (both installers and live) as they don't fit those resolution. It not possible to change the resolution after the fact, as there is only 1 option (the current resolution). Is there a way to fix this?

rossengeorgiev commented 4 years ago

The latest ventoy seems to work ok for winpe. After some experimentation Ubuntu20/Fedora31 issue is to do with having nvidia gpu. I tried many things to get the resolution to work for live mode, but nothing worked. Likely a driver issue. There are other linux distros that seems to boot fine and run in 1980x1080. Therefore, this is not a ventoy issue

rossengeorgiev commented 3 years ago

I've rebuilding my usb flash drives I realized that enabling secureboot support is what caused the low resolution issue. Without that all live CDs work fine.

Various WINPE based iso - low resolution
Ubuntu ISO - low resolution
Kali Linux - normal resolution

cclloyd commented 3 years ago

I had this issue as well. Multiple make/models of computer. The bootloader itself is 1080p but most things that boot boot at 800x600.

Gparted Live worked fine. But anything that booted WinPE was stuck at low resolution. Even if secure boot was enabled and enrolled. Even with it disabled in the bios.

Only thing that worked was using Ventoy without secure boot support.

ThomasWaldmann commented 1 year ago

Just wasted some hours before finding this ticket:

could not get macrium reflect rescue media working with high screen resolution, only 640x480
UEFI boot, but secure boot disabled in machine setup (does not have legacy boot any more)
latest ventoy, updated via the linux script (I did not activate secure boot support in ventoy, but this seems the be the default now, although the script options help tells otherwise)
nothing helped ("CLI" text mode, using misc. older winpe versions, ...) - always only unusable 640x480
showed windows logo with spinning dots / circle below

Then I used the linux ventoy GUI updater, disabled ventoy secure boot support in the menu and updated my ventoy usb ssd.

Now it works again with high (usable) resolution and shows lenovo logo with spinning dots / circle below.

antipiot commented 1 year ago

Then I used the linux ventoy GUI updater, disabled ventoy secure boot support in the menu and updated my ventoy usb ssd.

I know i'm being kind of late here, but wanted to say that, on my side: enabling the secure boot option in ventoy allowed me to have a decent resolution on a Lenovo notebook. Anyway, your comment made me try it so thanks you!