The only suggestion I can think is to reinstall your Lubuntu. If it gives
you the option to upgrade, try that.

‪On Mon, Oct 23, 2017 at 8:34 PM ‫Mohammad Abdullah مُحَمّد عَبدُاﷲ‬‎ <
[email protected]> wrote:‬

> Unable to execute the login shell. I think with apt remove, several base
> system pkgs got removed.
>
> So anything with live usb. Thanks for the time.
>
> --
> Mohammad Abdullah
>
> On 24-Oct-2017 2:13 AM, "Jeremiah Bess" <[email protected]> wrote:
>
>> Wow, the pit just keeps getting deeper! When you are on that error screen
>> you posted, try these steps:
>>
>>    1. ctrl+alt+f2, login, and:
>>    2. sudo systemctl enable lightdm.service
>>    3. sudo systemctl start lightdm.service
>>
>>
>> ‪On Mon, Oct 23, 2017 at 12:07 PM ‫Mohammad Abdullah مُحَمّد عَبدُاﷲ‬‎ <
>> [email protected]> wrote:‬
>>
>>> Entrapped in a very unusual situation.
>>>
>>> While installing and reinstalling themes. I broken my system.
>>>
>>> Now I'm unable to reach to login screen and neither able to invoke tty
>>> login through ALT+Fn keys.
>>>
>>> The screenshot is attached. I removed the theme named *adwaita. *And
>>> then all goes blank.
>>>
>>> Kindly rescue. I've live usb with Lubuntu.
>>>
>>> Thanks.
>>>
>>> --
>>> Mohammad Abdullah
>>>
>>>
>>> On 23-Oct-2017 4:24 PM, "Jeremiah Bess" <[email protected]> wrote:
>>>
>>> I don't think the GTK error is what is causing the crash. But try
>>> running this command to install the missing theme, and see if the crash
>>> problem persists:
>>>
>>> sudo apt install gnome-themes-standard
>>>
>>> ‪On Sun, Oct 22, 2017 at 11:47 PM ‫Mohammad Abdullah مُحَمّد عَبدُاﷲ‬‎ <
>>> [email protected]> wrote:‬
>>>
>>>> Dear Sir/Madam,
>>>>
>>>> The problem happens with dropbox client as well. I have installed
>>>> dropbox from synaptic repository and also from the .deb pkg downloaded from
>>>> website of dropbox.
>>>>
>>>> Scenario is: LUBUNTU 17.04, i386, 2gb RAM,
>>>> Synchronisation happens well and client is working as is, in background.
>>>> But no user interface or app window does not appears. Though
>>>> notification area shows that dropbox is up and working, files are
>>>> synchronising.
>>>> No menu even on clicking the dropbox icon in notification area.
>>>>
>>>> The logs from terminal is inlined. Kindly help.
>>>>
>>>> -------------------------------------
>>>> Mohammad Abdullah
>>>>
>>>>
>>>>
>>>> *********************************************////////////////////////////////*
>>>> abdullah@idiotbox:~/.dropbox-dist$ ./dropboxd
>>>> dropbox: locating interpreter
>>>> dropbox: logging to /tmp/dropbox-antifreeze-9bCyem
>>>> dropbox: initializing
>>>> dropbox: running python 2.7.11
>>>> dropbox: setting program path
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/dropbox'
>>>> dropbox: setting home path
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29'
>>>> dropbox: setting python path
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29:/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/python-packages-27.zip'
>>>> dropbox: python initialized
>>>> dropbox: running dropbox
>>>> dropbox: setting args
>>>> dropbox: applying overrides
>>>> dropbox: running main script
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/cryptography.hazmat.bindings._constant_time.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/cryptography.hazmat.bindings._openssl.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/cryptography.hazmat.bindings._padding.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/psutil._psutil_linux.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/psutil._psutil_posix.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/linuxffi.pthread._linuxffi_pthread.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/
>>>> tornado.speedups.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/cpuid.compiled._cpuid.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/linuxffi.resolv.compiled._linuxffi_resolv.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/posixffi.libc._posixffi_libc.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/librsyncffi.compiled._librsyncffi.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/linuxffi.sys.compiled._linuxffi_sys.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/PyQt5.QtWebKit.so
>>>> '
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/PyQt5.QtCore.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/
>>>> PyQt5.QtNetwork.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/PyQt5.QtGui.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/
>>>> PyQt5.QtWebKitWidgets.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/
>>>> PyQt5.QtWidgets.so'
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/
>>>> PyQt5.QtPrintSupport.so'
>>>>
>>>> (dropbox:13117): Gtk-WARNING **: Unable to locate theme engine in
>>>> module_path: "adwaita",
>>>>
>>>> (dropbox:13117): Gtk-WARNING **: Unable to locate theme engine in
>>>> module_path: "adwaita",
>>>>
>>>> (dropbox:13117): Gtk-WARNING **: Unable to locate theme engine in
>>>> module_path: "adwaita",
>>>> dropbox: load fq extension
>>>> '/home/abdullah/.dropbox-dist/dropbox-lnx.x86-37.4.29/PyQt5.QtDBus.so'
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *********************************************///////////////////////////////*
>>>>
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>>> --
>>>
>>> Jeremiah Bess
>>>
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>> --
>>
>> Jeremiah Bess
>>
>> --
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-- 

Jeremiah Bess

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