I have recently installed Ubuntu 18.04 (Not upgrade, a clean install). In Ubuntu 18.04, the rendering LaTeX function in Inkscape is not working. Following is the error output:

*** WARNING - the DELAYBIND command has been deprecated, and will be

           removed in the next version. For now you can restore

           the behaviour by using -dREALLYDEALYBIND but if you

           require continued use of this command you should contact

           the Ghostscript developers. Commercial customers of

           Artifex should email their support contact, free users

           are encouraged to talk to us on the #ghostscript IRC

           channel on irc.freenode.net.



Unrecoverable error: undefined in DELAYBIND

PostScript/PDF Interpreter finished. Return status 65280 executed command : /usr/bin/gs -q -dDELAYBIND -dWRITESYSTEMDICT -dNODISPLAY -dNOEPS "/tmp/psin5eNNQ0"

The interpreter seems to have failed, cannot proceed !

Traceback (most recent call last):
  File "eqtexsvg.py", line 160, in <module>
    e.affect()
  File "/usr/share/inkscape/extensions/inkex.py", line 283, in affect
    self.effect()
  File "eqtexsvg.py", line 154, in effect
    svg_open(self, svg_file)
  File "eqtexsvg.py", line 81, in svg_open
    doc = inkex.etree.parse(filename)
  File "src/lxml/etree.pyx", line 3426, in lxml.etree.parse
  File "src/lxml/parser.pxi", line 1839, in lxml.etree._parseDocument
  File "src/lxml/parser.pxi", line 1865, in lxml.etree._parseDocumentFromURL
  File "src/lxml/parser.pxi", line 1769, in lxml.etree._parseDocFromFile
  File "src/lxml/parser.pxi", line 1162, in lxml.etree._BaseParser._parseDocFromFile
  File "src/lxml/parser.pxi", line 600, in lxml.etree._ParserContext._handleParseResultDoc
  File "src/lxml/parser.pxi", line 710, in lxml.etree._handleParseResult
  File "src/lxml/parser.pxi", line 639, in lxml.etree._raiseParseError
  File "/tmp/inkscape-Y11679/eq.svg", line 1
lxml.etree.XMLSyntaxError: Document is empty, line 1, column 1

From the google search, what I have found that the problem is arising because of the ghostscript. The Render>LaTeX extension actually calls pstoedit which in terns calls ghostscript using DELAYBIND flag to convert from LaTeX to SVG. But in the newer version of ghostscript the flag DELAYBIND has been deprecated. The solution is to downgrade ghostscript to or below 9.20 version. The following are the methods that I have tried to downgrade ghostscript without any success.

Downgrading ghostscript from apt or aptitute

I have tried to downgrade the ghostrict using the following command.

sudo aptitude install ghostscript=9.18~dfsg~0-0ubuntu2

Or by using

sudo apt install ghostscript=9.18~dfsg~0-0ubuntu2

I am getting the following output

Unable to find a version "9.18~dfsg~0-0ubuntu2" for the package "ghostscript"

or

E: Version '9.18~dfsg~0-0ubuntu2' for 'ghostscript' was not found

I have tried some other version, like 9.20 of ghost script. Nothing worked.

Installing from ghostscript website:

I have downloaded the ghostscript from the ghostscript website, and installed using the following command

sudo ./configure
sudo make
sudo make install

It seems the installation is done, but if I am running the command

ghostscript  --version

It is showing the version as 9.22.

All the online solution that I am able to find is pointing towards the downgrading the ghostscript. But I don't know how to do it in Ubuntu 18.04.

Any solution?

I am trying to connect gmail using kmail from Ubuntu 16.04, but it is not connecting. After doing google search I came to know that, gmail using oauth 2 for authentication of desktop app. Is there a way I can use oauth in kmail for gmail in Ubuntu 16.04. I don't want to enable 'less secure access' in gmail.

Can I tag mp3 file such a way that banshee or rhythmbox music player can recognize the multiple artist separately. Right now the different artist are showing together like Arijit Singh & Harshjeep. I mean banshee is recognizing the whole entry as a separate artist, not individual one. So I can't effectively filter music using artist's name.

I want to install Adobe Reader X (10 or 11) in my system. But there is no native application available for Linux. After doing Google I have seen that Adobe Reader 10.1.14 is given gold rating with Wine 1.5.19. But when I have tried, the installation is going fine without any error, but I could not find the Adobe Reader in menu. So I have tried it through PlayOnLinux and getting error that "wine crashed". I really need the Adobe Reader x as Adobe Reader 9 does not support lots of commenting and writing tools of Adobe Reader x. Please help me to install it.

I am using Ubuntu 12.10 64 bit. I have tried to install Adobe Reader 10.1.14 and 11.0.01 with Wine 1.4 and 1.5.19 through PlayOnLinux.

I have recently brought HP LaserJet 1106 printer. I have installed it and it is working fine. But problem is I want to print on both side of the paper. But I am not getting any option to do that. I am not even getting the option to print only odd or even pages. Can any one help me in this regards. Thanks in advance.

I was using ibus-avro with ibus input method to write Bengali in Ubuntu 12.04. Recently I have upgraded Ubuntu from 12.04 to 12.10, now ibus-avro was removed. I have tried to install it again but was getting error message as follows

Some packages could not be installed. This may mean that you have  
requested an impossible situation or if you are using the unstable  
distribution that some required packages have not yet been created  
or been moved out of Incoming.  
The following information may help to resolve the situation:  

The following packages have unmet dependencies:  
ibus-avro : Depends: gir1.2-gjsdbus-1.0 but it is not installable  

When I am running some software using sudo command it showing error like

cannot connect to X server

For example if I run the following command:

$ sudo gedit /etc/profile

I am getting following command

(gedit:6758): WARNING **: Command line `dbus-launch --autolaunch=84b871d735f31ffe014dc9ba00000009 --binary-syntax --close-stderr' 
exited with non-zero exit status 1: 
Autolaunch error: X11 initialization failed. 
Cannot open display:
Run 'gedit --help' to see a full list of available command line options.

Or if I am running super-boot-manager I am getting following error

buc: cannot connect to X server

Please help.

I used to use mobile to connect via usb. Recently I have upgraded to ubuntu 11.04. Now I can not enable the mobile broadband. When ever I am enabling by checking the mobile it automatically getting disabled. It was working fine with the other version like 10.04 and 10.10. Can any one tell me how to enable mobile broadband. Thanking you A.Paul.