The screen is disrupted.

[Hiroki Saito]

Hello everyone.

I'm trying to install gentoo using iso (install-amd64-minimal-20200708T103427Z ,flashed to USB). However, when I press enter in grub to start gentoo, the screen gets messed up and I The installation process cannot continue.
Install with UEFI.

Model: HP Probook 450G2
cpu: intel Celeron 2957U

screenshot https://drive.google.com/file/d/133hxfkiPbhMb29C4htePN7iazFewhGeM

[Hiroki Saito]

(Added 11/07/2020.)

The boot was set to UEFI native mode.

When I tried to boot in UEFI hybrid mode (CSM enabled), the console was displayed. What is wrong with it?

[NeddySeagoon]

Hiroki Saito,

Welcome to Gentoo.

It sounds like EFI mode is trying to drive your display in a mode that it doesn't quite support and CSM uses a different mode.
Your image shows a video artefact caused by the horizontal syncs no being obeyed by the display, so you have horizontal tearing.

The fix is to edit the grub.cfg file but that's hard on a read only filesystem, so don't do that.

The Gentoo liveCD is not like the binary distro installers you are used to. Its only a set of tools to accomplish the install.
You will be the installer.
The up side to this is that you can use any live system or an existing Linux install to install Gentoo.
Boot the live media of your choice. Get a root shell. Give the command

[DONAHUE]

The only reference to UEFI in the users manuals for HP Probook 450G2 is for "UEFI diagnostics".
http://h10032.www1.hp.com/ctg/Manual/c04949683 pages 67/68 for example.
The term BIOS is used throughout the manuals where UEFI would be the correct term for a UEFI motherboard..
I can't find Secure Boot in the manuals.
HP's implementation of UEFI appears to me to want to insist on using CSM BIOS mode and to prevent booting the OS from UEFI GPT mode.

If CSM BIOS works for installing and booting gentoo you may want to use it.
If you want true UEFI GPT, possibly HP can be defeated by installing gentoo stub kernel or grub or rEFInd as HP specifies the diagnostic ware be installed. Then set up boot menu to boot the "diagnostic" as first choice.
_________________
Defund the FCC.

[Hiroki Saito]

Hello,NeddySeagoon

I'm worried I'm not getting it right, so let me make sure I'm getting it right. Is the following approach correct?



(1) Launch the Gentoo live image.

(2) After presuming that livecd gentoo # is displayed, run mkdir /mnt/gentoo.

(3) Install Gentoo as described in the Gentoo AMD64 Handbook ( From the Configuring the network section?)


Best regards.
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　Hiroki Saito

[Hiroki Saito]

Hello,DONAHUE

I checked the settings. Secure Boot was disabled. 　　　　　　　　　　　


Best regards.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　Hiroki Saito

[NeddySeagoon]

Hiroki Saito,

Your first step is incorrect.

Do not use the Gentoo live image at all.
Use some other non gentoo live image of your choosing.

The gentoo image provides /mnt/gentoo for you. When you use a non gentoo live image, you must make it for yourself.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

[Hiroki Saito]

I have been trying to install using the gentoo live install image from the beginning.

What do you mean by using other images?

Sorry for my lack of understanding.

[ian.au]

@Hiroki Saito

You don't need to install gentoo from gentoo, the boot media is irrelevant - any linux image that can boot on your hardware will do the job, you build your installation in a chroot anyway.

You could try the gentoo minimal install cd from https://www.gentoo.org/downloads/ (on the downloads page you will also see the last live image is dated 2016. You don't want that.)

Or just get a small distro and burn it to your boot media and follow the handbook from there.

[Hiroki Saito]

Sorry for the late posting.
Using the LiveDVD iso image solved this problem.

Thank you to everyone who supported me.