Difference between revisions of "Kernel parameters"
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! parameter !! description | ! parameter !! description | ||
|- | |- | ||
| − | | acpi | + | | {{bootparm|acpi|off}} || disables ACPI (keeps it from overriding APM) |
|- | |- | ||
| − | | acpi_sleep | + | | {{bootparm|acpi_sleep|s3_bios}} || makes the system call the video BIOS to reenable video on resume from suspend-to-ram (use this if you experience a blank display after resume while your system seems elsewise awake) |
|- | |- | ||
| − | | idebus | + | | {{bootparm|idebus|66}} || set IDE bus speed to 66 MHz (66 is maximum supported) |
|- | |- | ||
| − | | nolapic || tells the kernel not to use the local APIC (use if you have problems with ACPI) | + | | {{bootparm|nolapic|}} || tells the kernel not to use the local APIC (use if you have problems with ACPI) |
|- | |- | ||
| − | | noresume || boots without resuming after a suspend-to-disk | + | | {{bootparm|noresume|}} || boots without resuming after a suspend-to-disk |
|- | |- | ||
| − | | resume | + | | {{bootparm|resume|/dev/hdaX}} || tells the kernel where to find the suspend-to-disk image to resume from |
|- | |- | ||
| − | | root | + | | {{bootparm|root|/dev/hdaX}} || tells the kernel where to find the root filesystem |
|- | |- | ||
| − | | speedstep_coppermine | + | | {{bootparm|speedstep_coppermine|???}} || supposed to tell the kernel that you have a speedstep capable coppermine processor, but could possibly not work anymore with newer kernels |
|- | |- | ||
| − | | vga | + | | {{bootparm|vga|835}} || for 1400x1050 framebuffer resolution |
|- | |- | ||
| − | | video | + | | {{bootparm|video|radeonfb:vesa:1400x1050-32@60}} || for using accelerated radeonfb framebuffer |
|- | |- | ||
|} | |} | ||
Revision as of 12:20, 2 August 2005
Some aspects of the Linux kernels behaviour are controllable via so called kernel parameters. These are parameters similar to the ones that you would provide for a command like {{{2}}} ls or {{{2}}} cp in a shell, only that they are appended to the kernel/image line in your bootmanagers config file (for lilo this would typically be /etc/lilo.conf, for grub it would be /boot/grub/menu.lst).
An example line from grub could look like this:
kernel /lfskernel-2.6.9 root=/dev/hda6 rw idebus=66 vga=791 splash=silent acpi_sleep=s3_bios
For a complete overview of all available parameters see /lib/modules/`uname -r`/source/Documentation/kernel-parameters.txt.
Typical parameters used on ThinkPads
The following table gives an overview of the kernel parameters typically needed on ThinkPads.
| parameter | description |
|---|---|
acpi=off |
disables ACPI (keeps it from overriding APM) |
acpi_sleep=s3_bios |
makes the system call the video BIOS to reenable video on resume from suspend-to-ram (use this if you experience a blank display after resume while your system seems elsewise awake) |
idebus=66 |
set IDE bus speed to 66 MHz (66 is maximum supported) |
nolapic |
tells the kernel not to use the local APIC (use if you have problems with ACPI) |
noresume |
boots without resuming after a suspend-to-disk |
resume=/dev/hdaX |
tells the kernel where to find the suspend-to-disk image to resume from |
root=/dev/hdaX |
tells the kernel where to find the root filesystem |
speedstep_coppermine=??? |
supposed to tell the kernel that you have a speedstep capable coppermine processor, but could possibly not work anymore with newer kernels |
vga=835 |
for 1400x1050 framebuffer resolution |
video=radeonfb:vesa:1400x1050-32@60 |
for using accelerated radeonfb framebuffer |
