Many times after the boot of the PC the application lens doesn't return any result

[Nicola Jelmorini]

I use Ubuntu 12.04 64bit, and I have found that frequently, when I boot my PC, the Applications Lens doesn't return any result.
To make the lens working again, I have to use the command "unity --replace" to restart unity.

So, to find out what's going wrong, I have stopped the process "unity-applications-daemon", and restarted it in a terminal. These are the error messages displayed:

#################################################################################
close: Descrittore di file errato <== (Bad file descriptor)
unable to join the environment

(process:4912): unity-applications-daemon-WARNING **: daemon.vala:121: Unable to open ratings database environment '/home/nicola/.cache/software-center/reviews.ubuntu.com_reviews_api_1.0_review-stats-pkgnames.p__5.1.db.dbenv': Risorsa temporaneamente non disponibile <== (Resource temporarily unavailable)
#################################################################################

I haven't found a mean to restart this lens without restarting all Unity, and I don't know why sometimes this issue happens and sometimes not.

[Omer Akram (om26er)]

on logi, open and close the dash. check open a terminal and check if unity-applications-daemon is actually running, paste the output the below command in this bug report. I am not sure if restarting unity does actually starts the application daemon, so it may as well be another issue.

[Nicola Jelmorini (jelmorini)]

Hi Omer,

I can confirm you that the "unity-applications-daemon" is already running after the boot of the PC. I don't need to open the Dash. In fact if I execute in a terminal the command "/usr/lib/unity-lens-applications/unity-applications-daemon" the response is:

"Another instance of the Unity Applications Daemon already appears to be running. Bailing out"

Then I open and close the Dash, but, as always, the Applications Lens has no result.

You ask me to paste the output of the "below command" in this bug report, but, I'm sorry, I don't see any command to run.

[Omer Akram (om26er)]

sorry about that really :/

$ ps aux | grep "unity-applications-daemon"

[Omer Akram (om26er)]

could you "pkill unity-applications-daemon" and start the dash. This will make sure all instances of the daemon are killed.

[Nicola Jelmorini (jelmorini)]

I have used the command you suggested before the pkill and this is the output:

########################################################################
nicola@nicola-Pangolino:~$ ps aux | grep "unity-applications-daemon"
nicola 2687 0.0 0.3 495412 15528 ? Sl 08:41 0:01 /usr/lib/unity-lens-applications/unity-applications-daemon
nicola 8463 0.0 0.0 13616 928 pts/0 S+ 12:42 0:00 grep --color=auto unity-applications-daemon
nicola@nicola-Pangolino:~$
########################################################################

Then I have tried the command pkill, but the daemon doesn't close. It remains running. So I have run the system monitor and killed the daemon from there. After, I have opened the Dash and finally executed again your command. Here the output:

########################################################################
nicola@nicola-Pangolino:~$ ps aux | grep "unity-applications-daemon"
nicola 8470 0.0 0.0 13612 928 pts/0 S+ 12:46 0:00 grep --color=auto unity-applications-daemon
nicola@nicola-Pangolino:~$
########################################################################

Until I restarts it, there is no more applications daemon running on my system. And if I restarts the daemon, there is the message I have pasted in the bug description.

[Omer Akram (om26er)]

Its seems this bug has already been reported by someone else as bug 987689. marking this as duplicate. There is a workaround there which seems to have worked for two people

[Nicola Jelmorini (jelmorini)]

Thank you Omer, I will follow the other bug and try the workaround.

[Michal Hruby (mhr3)]

When you run the daemon from the terminal and try searching for something then, does anything else get output on the console? (try waiting up to 30seconds after the search)

[Nicola Jelmorini (jelmorini)]

Hello Michal,

no, the message is the same as above, and is the only one displayed in the console.