Ubuntu
hal package

hal-disable-polling can't be reversed

Bug #358390 reported by Mario on 2009-04-09

This bug affects 4 people

Affects		Status	Importance	Assigned to	Milestone
	hal (Ubuntu)	Invalid	Undecided	Unassigned
Nominated for Karmic by mclaud2000

Bug Description

Binary package hint: hal

If I disable the polling of my cdrom using hal-disable-polling, after I'm not able to restore the polling feature. I can do that only if I reboot my laptop or (maybe) restard the 'hal' service.
I'll try to explain the case as follows:
- this is the state of the hal-related process before any action:
$ ps aux | grep hal
111 5999 0.0 0.1 36528 5208 ? Ss 12:53 0:00 /usr/sbin/hald
root 6065 0.0 0.0 15816 1264 ? S 12:53 0:00 hald-runner
root 6098 0.1 0.0 28480 2156 ? S 12:53 0:02 /usr/lib/hal/hald-addon-rfkill-killswitch
root 6100 0.0 0.0 28484 2080 ? S 12:53 0:00 hald-addon-input: Listening on /dev/input/event8 /dev/input/event11 /dev/input/event0 /dev/input/event9 /dev/input/event10 /dev/input/event1 /dev/input/event5 /dev/input/event3 /dev/input/event7
root 6124 0.0 0.0 28476 2076 ? S 12:53 0:00 /usr/lib/hal/hald-addon-generic-backlight
root 6154 0.0 0.0 28492 2044 ? S 12:53 0:00 /usr/lib/hal/hald-addon-cpufreq
111 6155 0.0 0.0 32392 2036 ? S 12:53 0:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
root 6156 0.0 0.0 28484 2068 ? S 12:53 0:00 hald-addon-storage: polling /dev/sr0 (every 2 sec)
mario 6882 0.0 0.1 56328 4248 ? S 12:54 0:00 /usr/lib/gvfs/gvfs-hal-volume-monitor
mario 8430 0.0 0.0 7544 920 pts/0 S+ 13:25 0:00 grep hal

- then I try to disable the polling:
$ sudo hal-disable-polling --device /dev/cdrom 'hal'
[sudo] password for mario:
Following symlink from /dev/cdrom to /dev/sr0.
Polling for drive /dev/cdrom have been disabled. The fdi file written was
/etc/hal/fdi/information/media-check-disable-storage_model_DVD_RAM_UJ862AS.fdi

$ ps aux | grep hal
111 5999 0.0 0.1 36528 5208 ? Ss 12:53 0:00 /usr/sbin/hald
root 6065 0.0 0.0 15816 1268 ? S 12:53 0:00 hald-runner
root 6098 0.1 0.0 28480 2168 ? S 12:53 0:03 /usr/lib/hal/hald-addon-rfkill-killswitch
root 6100 0.0 0.0 28484 2080 ? S 12:53 0:00 hald-addon-input: Listening on /dev/input/event8 /dev/input/event11 /dev/input/event0 /dev/input/event9 /dev/input/event10 /dev/input/event1 /dev/input/event5 /dev/input/event3 /dev/input/event7
root 6124 0.0 0.0 28476 2076 ? S 12:53 0:00 /usr/lib/hal/hald-addon-generic-backlight
root 6154 0.0 0.0 28492 2044 ? S 12:53 0:00 /usr/lib/hal/hald-addon-cpufreq
111 6155 0.0 0.0 32392 2036 ? S 12:53 0:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
mario 6882 0.0 0.1 56328 4248 ? S 12:54 0:00 /usr/lib/gvfs/gvfs-hal-volume-monitor
mario 8847 0.0 0.0 7544 916 pts/0 R+ 13:34 0:00 grep hal

- it is effectively disabled (good!);
- let's try to revert the operation:
$ sudo hal-disable-polling --device /dev/cdrom 'hal' --enable-polling
Following symlink from /dev/cdrom to /dev/sr0.
Cannot find storage device /dev/cdrom.

$ sudo hal-disable-polling --device /dev/sr0 'hal' --enable-polling
Following symlink from /dev/sr0 to /dev/sr0.
Cannot find storage device /dev/sr0.

$ cat /etc/fstab | grep cdrom
/dev/sr0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0

- it doesn't work! The only way it to reboot the computer or to restart the hal service:
$ sudo /etc/init.d/hal restart
* Restarting Hardware abstraction layer hald

$ ps aux | grep hal
mario 6882 0.0 0.1 56328 4248 ? S 12:54 0:00 /usr/lib/gvfs/gvfs-hal-volume-monitor
111 8910 1.2 0.1 36664 5056 ? Ss 13:38 0:00 /usr/sbin/hald
root 8911 0.0 0.0 15944 1280 ? S 13:38 0:00 hald-runner
root 8946 0.0 0.0 28480 2108 ? S 13:38 0:00 /usr/lib/hal/hald-addon-rfkill-killswitch
root 8948 0.0 0.0 28484 2084 ? S 13:38 0:00 hald-addon-input: Listening on /dev/input/event8 /dev/input/event11 /dev/input/event0 /dev/input/event10 /dev/input/event1 /dev/input/event5 /dev/input/event9 /dev/input/event3 /dev/input/event7
root 8983 0.0 0.0 28476 2028 ? S 13:38 0:00 /usr/lib/hal/hald-addon-generic-backlight
root 9039 0.0 0.0 28492 2044 ? S 13:38 0:00 /usr/lib/hal/hald-addon-cpufreq
111 9041 0.0 0.0 32392 2040 ? S 13:38 0:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
root 9043 0.0 0.0 28484 2060 ? S 13:38 0:00 hald-addon-storage: no polling on /dev/sr0 because it is explicitly disabled
mario 9050 0.0 0.0 7544 920 pts/0 S+ 13:38 0:00 grep hal

$ sudo hal-disable-polling --device /dev/cdrom 'hal' --enable-polling
Following symlink from /dev/cdrom to /dev/sr0.
Polling for drive /dev/cdrom have been enabled. The fdi file deleted was
/etc/hal/fdi/information/media-check-disable-storage_model_DVD_RAM_UJ862AS.fdi

- it says that the polling is restored but it doesn't work; let's restart (another time!) the service:
$ ps aux | grep hal
mario 6882 0.0 0.1 56328 4248 ? S 12:54 0:00 /usr/lib/gvfs/gvfs-hal-volume-monitor
111 8910 0.2 0.1 36664 5056 ? Ss 13:38 0:00 /usr/sbin/hald
root 8911 0.0 0.0 15944 1292 ? S 13:38 0:00 hald-runner
root 8946 0.1 0.0 28480 2108 ? S 13:38 0:00 /usr/lib/hal/hald-addon-rfkill-killswitch
root 8948 0.0 0.0 28484 2084 ? S 13:38 0:00 hald-addon-input: Listening on /dev/input/event8 /dev/input/event11 /dev/input/event0 /dev/input/event10 /dev/input/event1 /dev/input/event5 /dev/input/event9 /dev/input/event3 /dev/input/event7
root 8983 0.0 0.0 28476 2028 ? S 13:38 0:00 /usr/lib/hal/hald-addon-generic-backlight
root 9039 0.0 0.0 28492 2044 ? S 13:38 0:00 /usr/lib/hal/hald-addon-cpufreq
111 9041 0.0 0.0 32392 2040 ? S 13:38 0:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
mario 9197 0.0 0.0 7540 900 pts/0 R+ 13:40 0:00 grep hal

$ sudo /etc/init.d/hal restart
* Restarting Hardware abstraction layer hald

$ ps aux | grep hal
mario 6882 0.0 0.1 56328 4248 ? S 12:54 0:00 /usr/lib/gvfs/gvfs-hal-volume-monitor
111 9253 6.0 0.1 36664 5068 ? Ss 13:41 0:00 /usr/sbin/hald
root 9254 0.6 0.0 15952 1272 ? S 13:41 0:00 hald-runner
root 9289 0.0 0.0 28480 2108 ? S 13:41 0:00 /usr/lib/hal/hald-addon-rfkill-killswitch
root 9291 0.0 0.0 28484 2076 ? S 13:41 0:00 hald-addon-input: Listening on /dev/input/event8 /dev/input/event11 /dev/input/event0 /dev/input/event3 /dev/input/event1 /dev/input/event5 /dev/input/event9 /dev/input/event10 /dev/input/event7
root 9332 0.0 0.0 28476 2020 ? S 13:41 0:00 /usr/lib/hal/hald-addon-generic-backlight
root 9382 0.0 0.0 28492 2040 ? S 13:41 0:00 /usr/lib/hal/hald-addon-cpufreq
111 9385 0.0 0.0 32392 2036 ? S 13:41 0:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
root 9387 0.0 0.0 28484 2060 ? D 13:41 0:00 hald-addon-storage: polling /dev/sr0 (every 2 sec)
mario 9394 0.0 0.0 7540 908 pts/0 R+ 13:41 0:00 grep hal

- the polling continues to be not working: it may depend from the broken connection between the hal service and the desktop components caused by the service restart.

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
Package: hal 0.5.12~rc1+git20090403-0ubuntu1
ProcEnviron:
PATH=(custom, user)
LANG=it_IT.UTF-8
SHELL=/bin/bash
SourcePackage: hal
Uname: Linux 2.6.28-11-generic x86_64

See original description

Tags:

Revision history for this message

Mario (diraimondo) wrote on 2009-04-09:

Dependencies.txt Edit (1.9 KiB, text/plain; charset="utf-8")

description:

updated

Revision history for this message

Jonathan Blackhall (johnny-one-eye) wrote on 2009-04-28:

I'm having the same problem. Confirming.

Changed in hal (Ubuntu):
status:	New → Confirmed

Revision history for this message

Harald (haraldboehmecke) wrote on 2009-05-13:

I am having a similar problem. I am able to disable it, but when I try to re-enable it, it won't find /dev/cdrom:

oot@bdi12718:/etc/hal/fdi/information# hal-disable-polling --device /dev/cdromFollowing symlink from /dev/cdrom to /dev/sr0.
Polling for drive /dev/cdrom have been disabled. The fdi file written was
/etc/hal/fdi/information/media-check-disable-storage_model_DVD_RAM_UJ_852.fdi
root@bdi12718:/etc/hal/fdi/information# hal-disable-polling --device /dev/cdrom --enable-polling
Following symlink from /dev/cdrom to /dev/sr0.
Cannot find storage device /dev/cdrom.
root@bdi12718:/etc/hal/fdi/information#

I am on JJ 9.04.

Worth opening a new bug report?

Revision history for this message

Harald (haraldboehmecke) wrote on 2009-05-13:

Sorry, it actually is the same issue. After restarting hal I am still unable to poll the cdrom drive. I did notice that ejecting the whole drive from the multi-bay and re-inserting it, restores the original behaviour, whithout the need to restart hal.

Revision history for this message

Mario (diraimondo) wrote on 2009-05-13: Re: [Bug 358390] Re: hal-disable-polling can't be reversed

Harald ha scritto:
> Sorry, it actually is the same issue.

Nobody is taking care of this report... :(

> After restarting hal I am still
> unable to poll the cdrom drive. I did notice that ejecting the whole
> drive from the multi-bay and re-inserting it, restores the original
> behaviour, whithout the need to restart hal.

I haven't tested this method but it looks "too manual" for my tastes. :)

Mario

Revision history for this message

Greg Oliver (oliver-greg) wrote on 2009-05-29:

You can just remove the fdi file and restart hal as a workaround...

-Greg

Revision history for this message

Mario (diraimondo) wrote on 2009-05-29:

<email address hidden> wrote:
> You can just remove the fdi file and restart hal as a workaround...

As long as I remember the restart of the hal service has some
side-effects: the connection with gnome-power-manager is lost and, for
example, it doesn't react to the changes of the power system
(battery/AC). This is a bad workaround.

Mario

Revision history for this message

Mario (diraimondo) wrote on 2010-10-11:

It has been fixed in Ubuntu Maverick 10.10

Revision history for this message

dino99 (9d9) wrote on 2013-05-24:

http://www.freedesktop.org/wiki/Software/hal/