Unity Tweak tool fails to start with the error "com.canonical.unity.webapps schema is missing"

Question

enter image description here

com.canonical.unity.webapps
In order to work properly, Unity Tweak Tool recommends you install the necessary packages

I have uploaded a screenshot of the problem. Please check it out. — Muddassir Nazir, Apr 18 '14 at 17:35
-1 to whoever wrote that error message. Yuck. (if they only added a filename one could try apt-file search). — Rmano, Apr 18 '14 at 18:29
@Rmano they did, I found it just fine using apt-file search. the full filename is com.canonical.unity.webapps.gschema.xml; maybe you need to run sudo apt-file update? — mchid, Jul 28 '15 at 10:14

score 80 · Accepted Answer · answered Apr 18 '14 at 17:49

80

Install the package unity-webapps-service

answered Apr 18 '14 at 17:49

Florian Diesch

87,389

3

I have the same problem but can't install the package. I get this error message:
The following packages have unmet dependencies. unity-webapps-service : Depends: webapp-container
– Mrokii Feb 24 '15 at 10:12
3

sudo apt-get install unity-webapps-service IS proper command – Pratik Joshi Apr 04 '15 at 05:47
2

I dont want webapps in my Desktop PC... Why can I not use a tweak tool without having a completely useless Ubuntu browser – inimene May 02 '15 at 17:52
@Mrokii Here, this worked for me. I had the same problem. http://askubuntu.com/a/668336/289337 – thesdog Sep 02 '15 at 14:11
2

@Florian: Wow! For me that pulled 120MB of qt dependencies. – ccpizza Sep 28 '15 at 17:38
6

Does this mean that the package for Unity Tweak Tool should have this package as a dependency but doesn't? – andrybak Oct 12 '15 at 21:28
2

For me this popped up after 15.04 to 15.10 upgrade. – Dennis Nov 12 '15 at 10:14
No need for webApps-service. Follow this: sudo apt install unity-lens-applications WORKED for me – Besan Vadim Apr 18 '20 at 05:25

mchid · Answer 2 · 2016-04-01T17:00:26.073

18

Just a command line way to do jackyzy823's answer:

mkdir tweak;cd tweak
sudo apt-get download unity-webapps-service
ar xvf *
tar xvf data*
sudo mv usr/share/glib-2.0/schemas/com.canonical.unity.webapps.gschema.xml /usr/share/glib-2.0/schemas/
sudo glib-compile-schemas /usr/share/glib-2.0/schemas/
cd ..; sudo rm -Rf tweak

edited Apr 01 '16 at 17:00

answered Jul 28 '15 at 10:11

mchid

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4

Beautiful! Works like a charm if you can't get the webapps-service to install. Thanks. – Andrew Fielden Oct 28 '15 at 10:23
2

Thanks, I have upvoted both answers. Just a suggestion, though: you might want to specify which answer you mean by 'above' - in this case jackyzy823's answer. – Hitechcomputergeek Nov 08 '15 at 02:24
1

In my case I didn't install anything. My theme and custom icon pack randomly stopped working and returned to default. Trying to re-configure it with Unity Tweak Tool failed with the same error as the OP. This answer fixed it. – Nahuel May 09 '16 at 19:10
1

In my case, I was getting this error because I actually do not have the notify-osd package installed; I am using xfce4-notifyd instead. So my fix was exactly as @mchid explained, only I downloaded notify-osd instead of unity-webapps-service. Works like a charm. – Jonathan E. Landrum Feb 28 '17 at 20:57

score 14 · Answer 3 · answered May 26 '15 at 03:37

14

A tricky way for this,because i do not want to download so many dependencies for unity-webapps-service.

extract the file com.canonical.unity.webapps.gschema.xml (you can see it in http://packages.ubuntu.com/trusty/amd64/unity-webapps-service/filelist) in package unity-webapps-service,put this file to /usr/share/glib-2.0/schemas/ and finally sudo glib-compile-schemas /usr/share/glib-2.0/schemas/ and it works.

answered May 26 '15 at 03:37

jackyzy823

141

2

Thanks! This is the best answer, as unity-webapps-service refuses to be installed. – Sumit Jain Jul 13 '15 at 06:19
Where do I find the schema file? – thesdog Sep 01 '15 at 21:55
@thesdog go here http://packages.ubuntu.com/trusty/unity-webapps-service. Download the deb package, and unpack using the instructions in the post below by mchid. – Andrew Fielden Oct 28 '15 at 10:18

score 10 · Answer 4 · answered Oct 01 '14 at 14:16

10

Simple solution.

Just Install necessary packages.

sudo apt-get install unity-webapps-common

answered Oct 01 '14 at 14:16

Brunno Bettini

109
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2

1

Installing this package solves the problem. At least for 14.10. – Grzegorz Żur Feb 04 '15 at 12:46
2

I get this error:
The following packages have unmet dependencies: unity-webapps-common : Depends: unity-webapps-service (>= 2.3.8-0ubuntu3) but it is not going to be installed E: Unable to correct problems, you have held broken packages.

Synaptic says I have no broken packages.
– Marc May 04 '15 at 01:13
how did you know to install unity-webapps-common ? It's not mentioned at all in the error screen shown in OP. Is it mystic knowledge that comes to you when you sleep? – frumbert May 07 '15 at 10:23

score 4 · Answer 5 · edited Oct 11 '16 at 17:02

I had no problem installing webapps service and webapps common. My exact problem was the package

 com.canonical.unity.FileLens

was missing. I misread the screenshot in this question, and spent more than half an hour trying to figure out why even though unity webapps service and webapps common are installed unity tweak tool is not working. Finally I found out the above package was missing instead of the one mentioned in the screenshot.

To solve this error, install the unity-lens-files package

sudo apt-get install unity-lens-files

That's it. Unity Tweak Tool is now working! (finally!)

rustyx · Answer 6 · 2020-05-24T10:45:04.320

2

In case of Ubuntu 19 or later, install the unity-lens-applications package by running:

sudo apt install unity-lens-applications

edited May 24 '20 at 10:45

answered Oct 18 '19 at 21:00

rustyx

917

score 2 · Answer 7 · edited Oct 18 '19 at 01:13

2

For those who still need a solution: the problem occurs if one uninstalls the overlay scrollbars. To solve the problem, install the overlay scroll bars again (sudo apt-get install overlay-scrollbar) and disable them via the Unity Tweak Tool itself. (System > Scrolling)

edited Oct 18 '19 at 01:13

Zanna

70,465

answered Feb 08 '16 at 07:54

Marcos Jacoby

541

score 1 · Answer 8 · edited Apr 25 '15 at 02:41

1

Simple, and effective type

sudo apt-get install unity-webapps-common unity-webapps-service

into the terminal

edited Apr 25 '15 at 02:41

muru

197,895
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answered Apr 25 '15 at 01:22

cgameing

11

yes..dear, that answer in already given above. Installing unity-webapps-service is enough. – Muddassir Nazir Apr 25 '15 at 14:56

score 0 · Answer 9 · answered Oct 04 '18 at 15:49

0

Go to the terminal and run the following commands. This works for me. Hope it works for you.

sudo apt-get install --reinstall notify-osd
sudo apt-get install --reinstall overlay-scrollbar

answered Oct 04 '18 at 15:49

Sylvester

23

score 0 · Answer 10 · edited Dec 13 '17 at 18:02

0

You need is to use synaptic. Try these:

Install synaptic: "sudo apt-get install synaptic" in the terminal.
Open Synaptic from the dash or from terminal sudo synaptic.
Click on Custom Filters then Missing Recommended Packages.
Highlight all and right click mark for installation
Click apply on the toolbar.

edited Dec 13 '17 at 18:02

Muddassir Nazir

4,461

answered Dec 04 '17 at 05:33

H.sboui

1

Unity Tweak tool fails to start with the error "com.canonical.unity.webapps schema is missing"

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