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Difference between revisions of "Boot-args (iBoot variable)"
(Reformatted into a table) |
m (rd/rootdev confusion; I don't backlight-level is a boot-arg, only an env variable) |
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! Description |
! Description |
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! Notes |
! Notes |
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| − | |- |
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| − | | backlight-level=# |
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| − | | <code>1</code>-<code>128</code> |
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| − | | Set LCD backlight level |
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| − | | |
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|- |
|- |
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| debug=# |
| debug=# |
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| rd=? |
| rd=? |
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| <code>'md#'</code> |
| <code>'md#'</code> |
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| − | | Specify |
+ | | Specify the root device to boot from |
| − | | Used when [[Restore Process|restoring]] |
+ | | Used when [[Restore Process|restoring]]; same as <code>rootdev</code> |
| + | |- |
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| + | | rootdev=? |
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| + | | <code>'md#'</code> |
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| + | | Specify the root device to boot from |
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| + | | Same as <code>rd</code> |
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|- |
|- |
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| serial=# |
| serial=# |
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Latest revision as of 21:15, 9 June 2020
These are boot arguments that the iOS kernel accepts. These can be booted with a patched iBoot; untethered BootROM jailbreaks such as redsn0w and checkra1n do this when you set custom boot-args.
Known Boot Arguments
| boot-arg | Values | Description | Notes |
|---|---|---|---|
| debug=# | 0x09: Kernel debugging
|
Set kernel debug options | |
| nand-enable-reformat=# | 0, 1
|
Set whether or not to reformat NAND when restoring | Used when restoring |
| pmd=#.# | Start/end address of ramdisk | Specify a ramdisk in memory to boot from | Used in the Ramdisk Hack |
| -progress | N/A | Enable progress bar when restoring | Used when restoring |
| rd=? | 'md#'
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Specify the root device to boot from | Used when restoring; same as rootdev
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| rootdev=? | 'md#'
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Specify the root device to boot from | Same as rd
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| serial=# | 3: Debug output over serial
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Set serial debug options | Same as debug-uarts
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| -v | N/A | Enable verbose booting |
