UEFI – Disable SMM system management mode

My question is very simple how to disable the SMM. I know there are some methods that are listed here.
Ref: https://patents.google.com/patent/US9977682B2/en

But I have not found anything where it is explained in more detail. It is not easy to understand for newbies.
I want to check the behavior of the system without SMM.

I think the best way would be to turn off SMM via. MSR Write in the register. If it's not read-only.
Or MOD the UEFI BIOS. (Set the bits in the right place or remove the SMM modules / firmware?)

Thank you in advance.

Reviving the Windows start in the UEFI Steup with two hard drives

Disclaimer: I haven't had dual boot windows in 15 years and I'm pretty inexperienced. So please take my description of the situation with a grain of salt.

I have two separate hard drives /dev/nvme0n1 what I used for Ubuntu 19.10 and /dev/sda A solid state for Windows 10. The way I installed followed this question. Summary: Install Windows, then Ubuntu with efi, swap, and / Partitions. After that, I can simply log in to my Ubuntu.

However, my Windows installation is nowhere to be seen. sudo parted -l gives:

Model: ATA Samsung SSD 850 (scsi)
Disk /dev/sda: 256GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name                          Flags
 1      1049kB  17,8MB  16,8MB               Microsoft reserved partition  msftres
 2      17,8MB  256GB   256GB   ntfs         Basic data partition          msftdata

Model: Samsung SSD 960 EVO 250GB (nvme)
Disk /dev/nvme0n1: 250GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system     Name  Flags
 1      1049kB  650MB   649MB   fat32                 boot, esp
 2      650MB   20,6GB  20,0GB  linux-swap(v1)
 3      20,6GB  250GB   229GB   ext4

I suppose gpt The parition tells me that both are in EFI mode …

os-prober does not return anything and efibootmgr returns:

BootCurrent: 0003
Timeout: 1 seconds
BootOrder: 0003,0008,0009,0001,0002
Boot0001  UEFI: IP4 Intel(R) Ethernet Connection (2) I219-V
Boot0002  UEFI: IP6 Intel(R) Ethernet Connection (2) I219-V
Boot0003* ubuntu
Boot0008* UEFI: IP4 Intel(R) Ethernet Connection (2) I219-V
Boot0009* UEFI: IP6 Intel(R) Ethernet Connection (2) I219-V

in the /boot/efi/EFI/ I have the following (no WINDOW)

├── BOOT
│   ├── BOOTX64.EFI
│   ├── fbx64.efi
│   └── mmx64.efi
└── ubuntu
    ├── BOOTX64.CSV
    ├── grub.cfg
    ├── grubx64.efi
    ├── mmx64.efi
    └── shimx64.efi

By inspection /boot/grub/grub.cfg visually (I can't open the Grub menu during startup) there seems to be menuentry and submenu for Ubuntu options, but no mention of Windows.

Can you still imagine that I can bring back the Windows stuff without reinstalling everything?

It cannot be started from the USB drive UEFI USB that is not listed in the start menu

I recently decided to use Ubuntu. After trying it on a VM, I decided to dual boot next to Windows 10. Windows 10 runs on my Samsung 850 SSD. I decided to partition my hard drive and run Ubuntu there instead.
After a while I decided on another SSD just for Ubuntu. I just naively deleted the partition on the hard drive with Ubuntu because I thought that would simply remove it completely. Of course, Ubuntu is still listed in my boot menu.
The problem I have now is that I can't boot Ubuntu's ISO from the USB drive I'm using.
In the boot menu I don't get the option to boot from "UEFI USB" or anything like that. Instead, the only relevant option is simply "Sandisk".
I tried to change the start order and to deactivate the safe start. I used Etcher to flash the drive. I have no idea what to do now. I didn't have these problems before when I dual booted on the partitioned drive, but I used a different USB drive that I no longer have.

Any help with this problem is greatly appreciated!

Many thanks

Bios / Grub / UEFI is only displayed when the DVI monitor is connected, black screen for HDMI

Therefore, I recently installed Ubuntu as a dual boot on my PC and encountered some problems, in short: I couldn't get the grub options for Ubuntu / Windows to work and was always thrown into Ubuntu immediately.

After discussing the comments on this answer, I was advised to remove everything and reinstall both Windows and Ubuntu from scratch.

Now at the time I didn't want to get through since it was the end of this weekend. Next weekend I realized that it is quite difficult to erase a hard drive while the system is running. So I tried accessing Grub again. I noticed that the screen just stayed black when I started & # 39; esc & # 39; used. I didn't really pay attention to that at first. But now I followed the assumption that my monitor somehow did not display the menu. Connecting my old monitor with a DVI cable and removing the new monitor led me to the start menu. In particular, I was able to boot Windows. I came across a few other curiosities:

  • Oddly, using the Recovery boot option for Ubuntu eliminated my login delays, but when I use the normal boot option, they came back
  • There were two Ubuntu options there. The second caused a crash.
  • I ran some diagnostics, updated the BIOS, etc. using the HP Diagnostic Tool, and then tried again to boot with the new monitor connected via HDMI. Now the screen was just black instead of throwing me directly into Ubuntu
Old monitor: Asus 24" ?? from 2011
New monitor: LG 27UK600-W
Processor: Intel® Core™ i7-6700 CPU @ 3.40GHz × 8
Graphics: llvmpipe (LLVM 9.0, 256 bits) 
Ubuntu: Ubuntu 18.04.4 LTS

There should actually be an NVIDIA graphics card, but this is shown in the settings, so I think the DVI connection may lead to the integrated graphics card. I will try to connect the Asus with an HDMI cable and see what results I get from it.

hp – Install Ubuntu 18.04 on UEFI and delete Windows 8


HP 19-2113w ALL IN ONE PC With Windows 8 (sticker). I think they have upgraded to Windows 10.

Just reset to factory settings (which have been restored to Windows 8). Seems to be working properly.

I want to install Ubuntu 18.04 but can't get the PC to see a USB drive or Ubuntu installation DVD. I think it has something to do with Secure Boot. If you try to restart the PC, you have to deactivate the safe start (what I do in the BIOS) and activate the legacy start (cannot because it is grayed out). You can only enable legacy startup if you disable the Safe Start menu says it is disabled.

I haven't used Windows since XP and I'm not sure what it will do. If I could just start my USB stick and erase the hard drive and install Ubuntu, everything would be fine. Any ideas would be welcome.

I have another 500 GB hard drive. If I plug it into my Ubuntu computer, install Ubuntu 18.04 and then replace the hard drives, the PC boots on Ubuntu without screwing with Secure Boot

Linux – Are there other distrons that work on UEFI and Intel Atom CPUs (instead of Lubutnu)?

Hey, I'm looking for a ** very light ** Linux distribution to set it up on a small trashy notebook. I will use this equipment to learn and play with server software like Apache http server, Nginx, maybe some FTP servers etc.

I have Lubuntu here now, but I need to check something else. Is it possible to run CentOS or (please God) Debian on this evil configuration? I remember there are some issues with the operating system working correctly on this setup, but I believe that Lubuntu is not my only option.

PS: I don't care about the sound, the network (I have a few external sticks). Please guide me to uncovered Linux land on my future server

uefi – Which OS Type setting should be used for the dual booting of Ubuntu 18.04 with Windows 10?

I am new to Ubuntu / Linux and am trying to set up dual boot on my Windows 10 computer for in-depth learning. I am in the process of deactivating the safe start. I have an ASUS machine. I'm a bit confused by the UEFI / BIOS terms and how that works in Ubuntu.

I wonder what exactly it means to disable Safe Boot and what UEFI / BIOS means in this context. In the advanced UEFI firmware settings, I can change the operating system type from Windows UEFI mode to "other operating system". If I deactivate the safe start, do I have to change the operating system type to "other operating system"?

I was able to boot Unbuntu from a live USB device without disabling Safe Start, but in every tutorial that I watched, I was advised to disable Safe Start. That also confuses me!

Basically, I am very new to this area, and even the terminology was quite a hurdle for me. Any instructions will be greatly appreciated. This is what my machine looks like

boot – How to make external USB hard drives for BIOS and UEFI bootable

It seems almost fine, but the names of the directories under EFI are critical. I'm assuming your disk partitioning is legacy, so no explicit 2M bios grub partition is required. UEFI and DOS partitioning is not the standard method (use GPT and an explicit bios-grub partition and an EFI partition), but it really makes no difference in your case.

Example of an EFI partition directory layout from which you are deploying it.

  • /EFI/Boot/bootx64.efi – This is the boot loader that is used. So make a copy of shimx64.efi for a safe start, otherwise a copy of grubx64.efi (or just set up Secure Boot and it works both ways.

  • /EFI/Boot/grubx64.efi – If bootx64.efi is a copy of shimx64.efi, put the signed grubx64.efi file in the same directory.

  • / EFI / ubuntu /grub.cfg – The grub stub configuration file.

Example of the stub file grub.cfg with the root directory on the eighth partition:

search.fs_uuid Your-UUID-here root hd0,gpt8 
set prefix=($root)'/boot/grub'
configfile $prefix/grub.cfg