Difference between revisions of "Hwdetect"
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==Example== | ==Example== | ||
| − | You can use the following method to disable {{ | + | You can use the following method to disable {{Ic|MOD_AUTOLOAD}} in [[rc.conf]]. This should improve boot times, as time will not be spent discovering modules. |
# hwdetect --modules | # hwdetect --modules | ||
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MODULES=(ac battery button processor thermal video cdrom ....) | MODULES=(ac battery button processor thermal video cdrom ....) | ||
| − | Copy this output to replace the {{ | + | Copy this output to replace the {{Ic|MODULES}} section in {{Filename|/etc/rc.conf}} and change {{Ic|MOD_AUTOLOAD}} from "yes" to "no". The system should now skip the auto-load and boot faster. |
==Tips== | ==Tips== | ||
Revision as of 16:32, 11 December 2011
hwdetect is a hardware detection script primarily used to load or list modules for use in rc.conf or mkinitcpio.conf. The script makes use of information exported by the sysfs subsystem employed by the Linux kernel.
Contents
Installation
The Template:Package Official package is available in [extra]:
# pacman -S hwdetect
Usage
Options: --kernel_version= use kernel version (no autodetect) --ide-legacy use old ide modules instead of pata --load-modules load all detected modules --unload-modules unload all detected modules --show-modules show all detected modules --show-modules-order shows load order of detected modules --show-agp show AGP modules --show-ide show IDE modules --show-scsi show SCSI modules --show-sata show SATA modules --show-usb show USB modules --show-fw show FIREWIRE modules --show-net show NETWORK modules --show-input show INPUT modules --show-irda show IRDA modules --show-isdn show ISDN modules --show-pcmcia show PCMCIA modules --show-sound show SOUND modules --show-video show VIDEO modules --show-other show OTHER modules For /etc/mkinitcpio.conf use: --hostcontroller show MODULES= for all hostcontrollers --vmware add BusLogic to MODULES for vmware --hooks show HOOKS= --hooks-dir use this directory for HOOKS check --dsdt add dsdt to HOOKS= --raid add raid to HOOKS= --raid-partitions add raid-partitions to HOOKS= --encrypt add encrypt to HOOKS= --lvm2 add lvm2 to HOOKS= --keymap add keymap to HOOKS= --usb add usb to HOOKS= --fw add fw to HOOKS= --pcmcia add pcmcia to HOOKS= --nfs add net to HOOKS= For /etc/rc.conf use: --net show network MODULES --modules show all detected MODULES
Example
You can use the following method to disable MOD_AUTOLOAD in rc.conf. This should improve boot times, as time will not be spent discovering modules.
# hwdetect --modules
The command should output something similar to the following (of course, output depends on the system):
MODULES=(ac battery button processor thermal video cdrom ....)
Copy this output to replace the MODULES section in Template:Filename and change MOD_AUTOLOAD from "yes" to "no". The system should now skip the auto-load and boot faster.
Tips
List generated with "hwdetect --modules" is very long. You might be interested only with those which are not actually loaded. Script does the job:
eval $(hwdetect --modules)
for m in ${MODULES[*]}; do
if ! grep -sq $(echo $m|tr - _) <(lsmod); then
echo $m;
fi
done