Sometimes CPU hardware bugs make them report the cache size incorrectly. Override pmtimer IOPort with a hex value. Currently this function knows a and chips. With this option set, extended tables will not be used even on hardware which claims to support them. Only supported option is baud rate. This is the the default.

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Also note the kernel might malfunction if you disable some critical bits.

We have interrupts disabled while waiting for the ACK, so if this is set too high interrupts may be lost! These just stress RCU, they don’t participate libqta the actual test, hence the “fake”.

This may not work reliably with all consoles, but is known to work with serial and VGA consoles. Normally a brightness value of 0 indicates backlight switched off, and the maximum of the brightness value sets the backlight to maximum brightness.

Anatomy of a SATA Device Driver

The default value is 64 megabytes. Note there is a space following “–” and before the added option. The documentation is not bad but it is written by Linux programmers for Linux programmers. List entries are separated by commas. Just pass the driver to filter for as the parameter.

  IBM MT-M 8309-72G DRIVER

Forcing ASPM on may cause system lockups.

As long as there’s no ambiguity shortcut notation is allowed. This is the time required before an idle device will be autosuspended.

Common kernel problems

Other procedures, such as editing the boot menu lines, can be used on either the LiveCD or on an installed system. It can also be changed with klogd or other programs. But then the bug reports will start flooding in as users try every cheap i. Wikj all controllers in which they are implemented, bit transfers are enabled by default.

With libata, you will quickly discover there are templates for each piece of hardware. Look for Assistive Technologies and at-spi in Synaptic. This is a member array composed of values ranging from NOTE that such command can only affect the OSI support state, thus specifying it multiple times through kernel command line is also meaningless.

BootOptions – Community Help Wiki

This is actually a boot loader parameter; the value is passed to the kernel using a special protocol. Pressing F6 brings up the popup menu. The most common failure mode is ‘black screen on resuming’, but the system may also hang while suspending.


Accessibility options may also assugn added after installation. When not using this parameter you use sysrq-g to break into the kernel debugger. There is no formula or how to for porting software from other operating systems. Use this if your machine has a non-standard PCI host bridge. Set your framebuffer resolution to VESA mode xxx. Although unlikely, in the extreme case this might damage your hardware.

This will also cause panics on machine check exceptions. Ubuntu now uses Grub 2 as its bootloader.

Enable suspend to both for in-kernel hibernation. This will guarantee that all the other pcrs are saved. This is a community maintained site.