diff options
Diffstat (limited to 'chapter06/hotplug.xml')
| -rw-r--r-- | chapter06/hotplug.xml | 47 |
1 files changed, 28 insertions, 19 deletions
diff --git a/chapter06/hotplug.xml b/chapter06/hotplug.xml index 31ddf022f..dccc2cf3f 100644 --- a/chapter06/hotplug.xml +++ b/chapter06/hotplug.xml @@ -11,10 +11,11 @@ <sect2 role="package"><title/> -<para>The Hotplug package contains scripts that react upon various changes -in the kernel state, in particular, addition and removal of hardware. This -package also detects existing hardware during boot and inserts the relevant -modules into the running kernel. +<para>The Hotplug package contains scripts that react upon hotplug events +generated by the kernel. Such events correspond to every change in the +in the kernel state visible in the "sysfs" filesystem, e.g., the addition and +removal of hardware. This package also detects existing hardware during +boot and inserts the relevant modules into the running kernel. </para> <segmentedlist> <segtitle>&buildtime;</segtitle> @@ -28,31 +29,34 @@ modules into the running kernel. <title>Installation of Hotplug</title> <para> -Apply the patch that avoids bogus dependencies of the -<command>usb.rc</command> script -upon <application>which</application> and -<application>usbutils</application> packages: +The <command>usb.rc</command> script provided by the +<application>Hotplug</application> package depends on the programs +<command>usbutils</command> and <command>which</command> being present. +However, these programs are not called for any useful purpose. +Apply the patch that removes those dependencies: </para> <screen><userinput>patch -Np1 -i ../hotplug-&hotplug-version;-bogus_deps-1.patch</userinput></screen> <para> -USB coldplugging is somewhat broken in Hotplug by default. Fix this with the -following patch: +USB coldplugging is somewhat broken in <application>Hotplug</application> +by default: the DEVICE environment variable is not passed to user-defined USB +hotplug handlers. Fix this with the following patch: </para> <screen><userinput>patch -Np1 -i ../hotplug-&hotplug-version;-device-2.patch</userinput></screen> +<!-- Waiting for hotplug-2004_04_01-isapnp-4.patch <para> -At last, there is an optional patch that adds ISAPNP hardware detection -capabilities to Hotplug. It is not well tested. If you chose to apply it, -run the following command: +There is an optional patch that adds ISAPNP hardware detection +capabilities to Hotplug. It is not well tested and in fact contains known +bugs. If you chose to apply it, run the following command: </para> <screen><userinput>patch -Np1 -i ../hotplug-&hotplug-version;-isapnp-2.patch</userinput></screen> +--> - -<para>And finally install the Hotplug package:</para> +<para>Now install the Hotplug package:</para> <screen><userinput>make install</userinput></screen> @@ -61,6 +65,11 @@ the script including with LFS-Bootscripts:</para> <screen><userinput>rm -rf /etc/init.d</userinput></screen> +<para>Network device hotplugging is not supported by LFS bootscripts yet. For +that reason, remove the network hotplug agent:</para> + +<screen><userinput>rm -f /etc/hotplug/net.agent</userinput></screen> +<!-- Will be useless with version 4 of the isapnp patch <para> If you have applied the ISAPNP patch, add some required entries to <filename>/etc/modprobe.conf</filename>:</para> @@ -81,7 +90,7 @@ EOF</userinput></screen> <para>These entries may not be needed in newer versions of the Linux kernel, since Marco d'Itri will try to convince developers to put them into the corresponding modules themselves.</para> - +--> </sect2> @@ -109,8 +118,8 @@ specific actions upon hardware already present during system startup. They are called by the <filename>hotplug</filename> initscript that comes from the lfs-bootscripts package. The <command>*.rc</command> -scripts try to find kernel modules corresponding to your hardware and insert -them into the running kernel. +scripts try to recover hotplug events that were lost during system boot +because, e.g., the root filesystem was not mounted by the kernel. </para> </listitem> </varlistentry> @@ -179,7 +188,7 @@ call for each USB device, based on its vendor, id and other attributes. <indexterm zone="ch-system-hotplug hotplug-hotplug.d"><primary sortas="e-/etc/hotplug.d">/etc/hotplug.d</primary></indexterm> <para>This directory contains programs (or symlinks to them) -that are interested in receiving all hotplug events. E.g., +that are interested in receiving hotplug events. E.g., <application>udev</application> puts its symlink here during installation. </para> </listitem> |