Matthew Burgess wrote:
Forwarding from blfs-dev, where an ALSA related thread went just a
little off-topic for BLFS :)
Thanks Alexander, I'll try to get these changes in a.s.a.p.
Matthew Burgess wrote:
I'll have to bite the bullet and see to getting all the module
hotplugging related bugs sorted out
This means just the following steps:
1) Upgrade udev to 071 to resolve the udev_run_hotplugd installation bug
2) Add these two rules to LFS default rules file:
ENV{UDEVD_EVENT}=="1", RUN+="/sbin/udev_run_hotplugd"
RUN+="/sbin/udev_run_devd"
Don't think that RUN+="/sbin/udev_run_devd" is requires for LFS as it
doesn't use devfs any more.
3) Change instructions to:
make EXTRAS=extras/run_directory/
make EXTRAS=extras/run_directory/ install
cp ../udev-config-5.rules /etc/udev/rules.d/25-lfs.rules
install -m644 -D docs/writing_udev_rules/index.html \
/usr/share/doc/udev-071/index.html
After that ends up in the book, we can try eliminating the hotplug
package gradually. E.g., for a start, build the firmware helper in
EXTRAS and use it instead of hotplug's firmware.agent.
Some cleanup of the current rules file is also needed. E.g., I would
change the following rules:
KERNEL=="dm-*", GROUP="disk", MODE="0640"
KERNEL=="card*", NAME="dri/card%n", GROUP="video"
to
KERNEL=="dm-*", NAME=""
KERNEL=="card*", NAME=""
in order for udev to completely ignore the corresponding devices.
Rationale:
dm: /dev/dm-* is not the proper name for such devices. Both "dmsetup"
and lvm2-related programs make the corresponding devices automatically
and with proper names, without udev and associated races.
card*: the X server makes those devices anyway without any help from
udev. I don't want udev to step on its back (aka race with permissions)
and recreate the devices.
I think that you can also add:
Add the rules to /etc/udev/rules.d/60-hotplug.rules
#
# usbfs-like device nodes
SUBSYSTEM="usb_device", PROGRAM="/bin/sh -c 'X=%k X=$${X#usbdev}
B=$${X%%%%.*} D=$${X#*.}; echo bus/usb/$$B/$$D'", SYMLINK+="%c"
# be backward compatible for a while with the /etc/dev.d and
/etc/hotplug.d/ systems
# run /etc/hotplug.d/ stuff only if we came from a hotplug event, not
for udevstart
ENV{UDEVD_EVENT}=="1", RUN+="/sbin/udev_run_hotplugd"
I'm not 100% sure but I think that pciutils (plus
pcimodules-pciutils-2.1.11.diff patch) and usbutils are also needed.
Build usbutils with:
./configure \
--prefix=/usr \
--sysconfdir=/etc \ #may not re required
--datadir=/usr/share \
--enable-usbmodules
To log hotplug events you could also add:
in /etc/hotplug/hotplug.functions change the lines:
if [ -t 1 or -z "$LOGGER" ]; then
to
if [ -z "$LOGGER" ]; then
and
$LOGGER -t $(basename $0)"[$$]" "$@"
to
$LOGGER -p local1.info -t $(basename $0)"[$$]" "$@"
Add to /etc/syslog.conf
local1.* -/var/log/hotplug.log
or
local1.* -/var/log/hotplug/messages.log
The syslog needs to be started after mounting the file systems rw and
before hotplugging.
Works for me.
Duncan
BTW Acpid is also quite useful for laptops and powering down by a quick
press of the power button.
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