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Pixelgeek
235 lines
10 KiB
ReStructuredText
235 lines
10 KiB
ReStructuredText
.. _change-kernel-boot:
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Change Kernel Boot
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########################
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This tutorial explains the process of change kernel boot entry |CL-ATTR|.
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.. contents::
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:local:
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:depth: 1
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Description
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***********
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For this tutorial, you will modify your kernel list to boot with the kernel you want to use. This process is valid when you cannot compile third-party kernel modules and need to come back to old, or if you compile your custom kernel.
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Get the current boot status
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***************************
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.. code-block:: bash
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bootctl status
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This is an example output:
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.. code-block:: bash
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System:
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Firmware: UEFI 2.70 (HP 265.256)
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Firmware Arch: x64
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Secure Boot: disabled
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TPM2 Support: yes
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Measured UKI: no
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Boot into FW: supported
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Current Boot Loader:
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Product: systemd-boot 255
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Features: ✓ Boot counting
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✓ Menu timeout control
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✓ One-shot menu timeout control
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✓ Default entry control
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✓ One-shot entry control
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✓ Support for XBOOTLDR partition
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✓ Support for passing random seed to OS
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✓ Load drop-in drivers
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✓ Support Type #1 sort-key field
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✓ Support @saved pseudo-entry
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✓ Support Type #1 devicetree field
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✓ Enroll SecureBoot keys
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✓ Retain SHIM protocols
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✓ Menu can be disabled
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✓ Boot loader sets ESP information
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ESP: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
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File: └─/EFI/org.clearlinux/loaderx64.efi
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Random Seed:
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System Token: set
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Exists: yes
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Available Boot Loaders on ESP:
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ESP: /boot (/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5)
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File: ├─/EFI/systemd/systemd-bootx64.efi (systemd-boot 255)
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└─/EFI/BOOT/BOOTX64.EFI (systemd-boot 255)
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Boot Loaders Listed in EFI Variables:
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Title: Linux bootloader
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ID: 0x0007
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Status: active, boot-order
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Partition: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
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File: └─/EFI/org.clearlinux/bootloaderx64.efi
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Title: Linux Boot Manager
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ID: 0x0001
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Status: active, boot-order
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Partition: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
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File: └─/EFI/systemd/systemd-bootx64.efi
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Title: Windows Boot Manager
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ID: 0x0000
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Status: active, boot-order
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Partition: /dev/disk/by-partuuid/48d8a9eb-d84d-4a62-8302-edff383290e5
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File: └─/EFI/Microsoft/Boot/bootmgfw.efi
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Boot Loader Entries:
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$BOOT: /boot (/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5)
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token: clear-linux-os
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Default Boot Loader Entry:
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type: Boot Loader Specification Type #1 (.conf)
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title: Clear Linux OS (Clear-linux-native-6.8.10-1434.conf)
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id: Clear-linux-native-6.8.10-1434.conf
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source: /boot//loader/entries/Clear-linux-native-6.8.10-1434.conf
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linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.8.10-1434
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initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
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/boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.8.10-1434
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/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
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/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
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options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall>
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lines 20-71/71 (END)
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✓ Support @saved pseudo-entry
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✓ Support Type #1 devicetree field
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✓ Enroll SecureBoot keys
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✓ Retain SHIM protocols
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✓ Menu can be disabled
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✓ Boot loader sets ESP information
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ESP: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
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File: └─/EFI/org.clearlinux/loaderx64.efi
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Random Seed:
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System Token: set
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Exists: yes
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Available Boot Loaders on ESP:
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ESP: /boot (/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5)
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File: ├─/EFI/systemd/systemd-bootx64.efi (systemd-boot 255)
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└─/EFI/BOOT/BOOTX64.EFI (systemd-boot 255)
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Boot Loaders Listed in EFI Variables:
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Title: Linux bootloader
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ID: 0x0007
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Status: active, boot-order
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Partition: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
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File: └─/EFI/org.clearlinux/bootloaderx64.efi
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Title: Linux Boot Manager
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ID: 0x0001
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Status: active, boot-order
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Partition: /dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5
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File: └─/EFI/systemd/systemd-bootx64.efi
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Title: Windows Boot Manager
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ID: 0x0000
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Status: active, boot-order
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Partition: /dev/disk/by-partuuid/48d8a9eb-d84d-4a62-8302-edff383290e5
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File: └─/EFI/Microsoft/Boot/bootmgfw.efi
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Boot Loader Entries:
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$BOOT: /boot (/dev/disk/by-partuuid/ea2e4278-5c0c-4498-bc99-dfc48a71ceb5)
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token: clear-linux-os
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Default Boot Loader Entry:
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type: Boot Loader Specification Type #1 (.conf)
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title: Clear Linux OS (Clear-linux-native-6.8.10-1434.conf)
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id: Clear-linux-native-6.8.10-1434.conf
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source: /boot//loader/entries/Clear-linux-native-6.8.10-1434.conf
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linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.8.10-1434
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initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
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/boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.8.10-1434
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/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
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/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
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options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall_debug intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 rootfstype=ext4,btrfs,xfs,f2fs tsc=reliable rw module.sig_unenforce rootflags=x-systemd.device-timeout=0
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Get the kernel list installed
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*****************************
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.. code-block:: bash
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bootctl list
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And example output:
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.. code-block:: bash
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type: Boot Loader Specification Type #1 (.conf)
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title: Clear Linux OS (Clear-linux-preempt_rt-6.1.38-105.conf)
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id: Clear-linux-preempt_rt-6.1.38-105.conf
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source: /boot//loader/entries/Clear-linux-preempt_rt-6.1.38-105.conf
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linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.preempt_rt.6.1.38-105
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initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
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/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
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/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
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options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall_debug intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 rootfstype=ext4,btrfs,xfs t>
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type: Boot Loader Specification Type #1 (.conf)
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title: Clear Linux OS (Clear-linux-native-6.9.1-1436.conf)
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id: Clear-linux-native-6.9.1-1436.conf
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source: /boot//loader/entries/Clear-linux-native-6.9.1-1436.conf
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linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.9.1-1436
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initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
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/boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.9.1-1436
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/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
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/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
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options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall_debug intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 rootfstype=ext4,btrfs,xfs,f>
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type: Boot Loader Specification Type #1 (.conf)
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title: Clear Linux OS (Clear-linux-native-6.8.10-1434.conf) (default) (selected)
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id: Clear-linux-native-6.8.10-1434.conf
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source: /boot//loader/entries/Clear-linux-native-6.8.10-1434.conf
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linux: /boot//EFI/org.clearlinux/kernel-org.clearlinux.native.6.8.10-1434
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initrd: /boot//EFI/org.clearlinux/freestanding-00-early-ucode.cpio
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/boot//EFI/org.clearlinux/initrd-org.clearlinux.native.6.8.10-1434
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/boot//EFI/org.clearlinux/freestanding-clr-init.cpio.gz
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/boot//EFI/org.clearlinux/freestanding-i915-firmware.cpio
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options: root=UUID=67e7ac9a-f7a1-4d5e-bbd6-012f5fa81cb5 rd.luks.uuid=abe6aaf2-3425-4eb1-b7f5-3f36746426fa quiet console=tty0 console=ttyS0,115200n8 cryptomgr.notests init=/usr/bin/initra-desktop initcall_debug intel_iommu=igfx_off kvm-intel.nested=1 no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 rootfstype=ext4,btrfs,xfs,f>
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type: Automatic
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title: Reboot Into Firmware Interface
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id: auto-reboot-to-firmware-setup
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source: /sys/firmware/efi/efivars/LoaderEntries-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f
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Set default kernel to boot
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**************************
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You can check the id from the latest command:
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.. code-block:: bash
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bootctl list |grep id: |cut -f 2 -d ":"
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id: Clear-linux-preempt_rt-6.1.38-105.conf
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id: Clear-linux-native-6.9.1-1436.conf
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id: Clear-linux-native-6.8.10-1434.conf
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id: auto-reboot-to-firmware-setup
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Set the kernel
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.. code-block:: bash
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sudo bootctl set-default ID
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For example to set 6.9.1 entry:
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.. code-block:: bash
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sudo bootctl set-default Clear-linux-native-6.9.1-1436.conf
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Just reboot
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.. code-block:: bash
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sudo systemctl reboot
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You will boot with the kernel set before.
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