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* On the [[Nokia N900]] and many device that use uboot (like [[MangoPi MQ-Pro (mangopi-mq-pro)]] , [[Xunlong Orange Pi 3 (xunlong-orangepi3)]]) , u-boot provides a mechanism to select the OS. See [[Nokia N900#Installation]] and [https://u-boot.readthedocs.io/en/latest/usage/cmd/bootmenu.html|See bootmenu on uboot doc]  
* On the [[Nokia N900]] and many device that use uboot (like [[MangoPi MQ-Pro (mangopi-mq-pro)]] , [[Xunlong Orange Pi 3 (xunlong-orangepi3)]]) , u-boot provides a mechanism to select the OS. See [[Nokia N900#Installation]] and [https://u-boot.readthedocs.io/en/latest/usage/cmd/bootmenu.html|See bootmenu on uboot doc]  
* One more way with u-boot: [[U-Boot_porting#Implement_multiboot_involving_Android_in_a_device_aport]]
* One more way with u-boot: [[U-Boot_porting#Implement_multiboot_involving_Android_in_a_device_aport]]
* On some amlogic device 's uboot . there are a multiboot mode : [[Amlogic#Boot process]]
* On fastboot devices that have an SD card, it is possible to install postmarketOS on the SD card, and boot through <syntaxhighlight lang="bash" inline>pmbootstrap flasher boot</syntaxhighlight>. This has the advantage of not modifying anything on the phone itself, but a USB cable and a host device (like a computer) are needed to boot the device with this procedure.
* On fastboot devices that have an SD card, it is possible to install postmarketOS on the SD card, and boot through <syntaxhighlight lang="bash" inline>pmbootstrap flasher boot</syntaxhighlight>. This has the advantage of not modifying anything on the phone itself, but a USB cable and a host device (like a computer) are needed to boot the device with this procedure.
* On most devices, the recovery partition holds a recovery image (or fastboot boot image (on some deivce)) . With the postmarketOS boot image flashed to the recovery partition and the root image flashed to either an internal partition or an sdcard, you will able to dualboot but doing that will make you lose the android recovery mode (this works on xiaomi-santoni and samsung-degaswifi)
* On most devices, the recovery partition holds a recovery image (or fastboot boot image (on some deivce)) . With the postmarketOS boot image flashed to the recovery partition and the root image flashed to either an internal partition or an sdcard, you will able to dualboot but doing that will make you lose the android recovery mode (this works on xiaomi-santoni and samsung-degaswifi)
* On msm8916 devices with lk2nd the boot image is loaded from an ext2 boot partition either on EMMC or SD card. Since [[lk2nd]] keeps backwards compatibility with android boot images, you can flash your android boot.img via lk2nd and it will boot that image unless an SD card with postmarketOS is inserted.
* On devices with lk2nd the boot image is loaded from an ext2 boot partition either on EMMC or SD card. Since [[lk2nd]] keeps backwards compatibility with android boot images, you can flash your android boot.img via lk2nd and it will boot that image unless an SD card with postmarketOS is inserted.
* Some uefi Implementation for android phone like ([https://efidroid.org efidroid],[[Renegade Project]]) can be used together with postmarketOS (see [[OnePlus_6_(oneplus-enchilada)/Dual_Booting_and_Custom_Partitioning#Dual booting pmos with other uefi based os (like openbsd , netbsd , freebsd,windows,etc) via Renegade Project | Guides for Dual boot pm os with other uefi based os via Renegade Project (with included guides for booting pm os via Renegade Project) on oneplus 6/6t  but some part of it can be reused on some other device as well.]])
* Some uefi Implementation for android phone like ([https://efidroid.org efidroid],[[Renegade Project]]) can be used together with postmarketOS (see [[OnePlus_6_(oneplus-enchilada)/Dual_Booting_and_Custom_Partitioning#Dual booting pmos with other uefi based os (like openbsd , netbsd , freebsd,windows,etc) via Renegade Project | Guides for Dual boot pm os with other uefi based os via Renegade Project (with included guides for booting pm os via Renegade Project) on oneplus 6/6t  but some part of it can be reused on some other device as well.]])
* On uefi / bios based device , grub can be used for dual booting (see [https://wiki.archlinux.org/title/Dual_boot_with_Windows Dual boot with Windows on arch wiki])
* On uefi / bios based device , grub can be used for dual booting (see [https://wiki.archlinux.org/title/Dual_boot_with_Windows Dual boot with Windows on arch wiki])

Revision as of 14:49, 31 August 2023

Icon This page could use some expansion. If you'd like to help out, feel free to edit this article!
In particular: This huge list could be split up into more specific tutorials. Perhaps include the contents from Use PostmarketOS Community pre-built image on your device here?

Dual Booting, also sometimes called Multiboot, is a process by which you can install multiple operating systems on your device, and select between them when booting it up.

postmarketOS currently might able to dual booting through recovery (kind of)

There are a few ways this can be achieved:

See also