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Installing_Manjaro_on_E585.md

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Installing Manjaro on the Lenovo ThinkPad E585

Make sure to update your FIRMWARE of your laptop.

Lenovo E585 support website

Firmware updates can be done with an USB flash drive.

Get the Manjaro ISO.

Manjaro

Use Etcher or Rufus to make a bootable iso.

BalenaEtcher For Linux, MacOS and Windows.

Rufus For Windows only.

Installing Manjaro

  1. After inserting USB flash drive and turning on your laptop make sure to press F12 during boot and select your USB flash drive or Ubuntu installation.
  2. make sure to hold or press SHIFT a couple of times to enter the GRUB menu.
  3. Highlight "Installing Boot: Manjaro.x86_64"
  4. Press the "E" key on your keyboard to edit.
  5. add without quotes "iommu=soft" to the list.
# Set arguments above with editor

        linux /boot/vmlinuz-$2
        initrd /boot/amd_ucode.img /boot/intel_ucode.img /boot/initramsfs-x86_64.img iommu=soft
  1. Press F10 to boot Manjaro.

Configuring GRUB

Open your terminal with the keys Super key (Windows key) + 4 and do the following:

sudo nano /etc/default/grub
  1. Add GRUB_CMDLINE_LINUX="iommu=soft"
  2. It should look like this
1 GRUB_DEFAULT=saved
2 GRUB_TIMEOUT=5
3 GRUB_TIMEOUT_STYLE=menu
4 GRUB_DISTRIBUTOR='Manjaro'
5 GRUB_CMDLINE_LINUX_DEFAULT="quiet   cryptdevice=UUID=826fc543-9373-4b18-bea5-ff6dfbb0135e:luks-826fa543-7873-4b189
6 GRUB_CMDLINE_LINUX="iommu=soft"
7 
8 # If you want to enable the save default function, uncomment the following
9 # line, and set GRUB_DEFAULT to saved.
10 GRUB_SAVEDEFAULT=true

  1. Press CTRL + O to save and CTRL + X to exit.

  2. Update GRUB with:

     sudo update-grub

Done

Explanation about 'iommu=soft'

Quoted from Tim Kennedy at https://unix.stackexchange.com/questions/469153/what-are-the-implication-of-iommu-soft

'iommu=soft' tells the kernel to use a software implementation to remap memory for applications that can't read above the 4GB limit.

The kernel documentation for these options is here: https://github.com/spotify/linux/blob/master/Documentation/x86/x86_64/boot-options.txt#L207

What's preferable is a solution that satisfies your expectations for performance, system temperature, battery life, etc, etc. If iommu=soft give you satisfactory performance, temperature, and battery life, then I would say go with that.