I was wondering how to reset Ubuntu's theme to default because I installed a new theme and now everything is broken despite already resetting the theme.  When I logout it goes to a blank screen and says low graphics mode and I can't do anything else so I have to reboot.    I am unable to show you the login screen and in gnome session nothing loads it is blank.  Ubuntu 13.10
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I've been messing around with Unity and broke something, how do I "start over"?
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After the upgrade from 12.10 to 13.04 my desktop background turns black after I try to set a image for that. How to fix it?  This is my desktop screen:
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When my computer blanks the screen after the timeout (10 minutes) or after I turn off the monitors and turn them back on some time later, I only see a black screen with the mouse pointer. I can move the mouse pointer, but nothing else happens.  I am able to switch to the console with Ctrl + Alt + F3 and then switching back to the display with Ctrl + Alt + F1 gives me the login screen. But after logging in, I get the same problem.  Restarting gdm3 from the console does not seem to help. It gets stuck initializing and then I have to hard shutdown. The only thing that works is to restart the machine from the console, but that is annoying.  Has anyone else experienced this problem or have any ideas on how to fix this?  My machine is Ubuntu 18.04 with the 4.15.0-32-generic kernel.
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System settings is missing. I tried reinstall it as it mentioned , but it seems to be installed and deactivated. This problem occurred when I installed Elementary desktop environment and uninstalled it afterwards.
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is it possible to set different blank screen timeouts in Ubuntu 18.04 with Gnome when on battery or ac? The power settings menu provides only one field which is applied always, no matter of the current mode.  This question was already asked for the Unity desktop a while ago () and they did not find a solution but I had the hope that that might have changed with Gnome now.
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I just installed ubuntu gnome 17.04.  I'm trying to install this theme:    It says just extract the theme into the .themes folder and use the tweak tool to select the gtk and shell themes.  So here's what I have:  ole@mkIV:~$ pwd /home/ole ole@mkIV:~$ ls .themes Gnome-OSX-2.6   I then reboot and attempt to find the new themes.  However they do not show up even though I have User Themes turned on under extensions.  Any ideas on how to fix this?
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How do I change the default session I get when I log in? I'm on Debian jessie. I tried changing settings on gdm3, tried installing lightdm and following  but it's just not working.  For more specificity, I'm trying to default to gnome-classic instead of gnome. I want to turn on the computer, log in as any arbitrary user, and see gnome-classic, not gnome3 (preferably I'd remove the gnome3 default session, if there's a way to do that).
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I've been experimenting with various Desktop Environments, including LXDE, XFCE, KDE.   I'm returning to Unity, and I would like my login screen back to the default for 12.04. I think that it changed when I tried KDE, probably because of an answer I gave to a prompt that I didn't understand.  Any ideas?
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I recently installed Ubuntu 14.04. Shutdown and logout from the top panel are not working.  They worked fine when installing the OS, but a few days back I installed fglrx drivers for my ATI graphics card. They didn't work and I got low resolution problems and Ubuntu didn't boot. I solved it by removing the fglrx graphic driver from the recovery mode and Ubuntu started to boot and work just fine, at least that's what I thought.  But now the shutdown and logout options in the top panel don't work. I have to logout using ctrl+alt+delete and shutdown with the shutdown option in the top panel (shutdown option works after logging out but not when logged in as a user).  I re-installed Ubuntu 14.04 LTS and shutdown options worked fine but after installing updates they stopped working again. I thought its the graphic driver fglrx installation problem but now i know its not that. I think its a problem with some file that got installed from Ubuntu updates.  Does any one know how to solve it?
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I installed Ubuntu 12.10 and at first when I go to check the system information I used to have (unknown) on the graphic card section, I used the synaptic manager and downloaded the fglrx, after that I restarted my laptop and now I don't have any menus, all of them are gone.  Now I am only using the keyboard shortcuts to use Ubuntu. My graphic card is AMD ATI.  What can I do to bring the menus back?
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I wanted to try out different desktop environments so I installed XFCE, KDE, GNOME, etc on top of Unity in Ubuntu 12.04  After a while I decided that I didn't like those other DEs and would stick to Unity. So I changed my default DE to Unity by configuring gdm.  sudo dpkg-reconfigure gdm   Now I am able to choose my DE at login time and all of DEs are working properly.   But the strange thing is that my boot up screen says 'lubuntu', my login screen is KDE, and my desktop is Unity.   How and why is this happening? Why didn't my gdm configuration have any effect? Does login and boot up screen need to be configured separately from the DE?  There are other similar questions here but they are not the same as this one. I do not want to remove the other enviroments I'm quite happy with having a list of DEs to select from. I want to know how to set proper defaults.
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I am experienced the following issue: after hibernation (using command sudo systemctl hibernatein a terminal or the menu on the right top of Ubuntu desktop) I get a black screen (Even though all devices seem to work. The fan works!) and I am forced to reboot the OS because resume failed and I can't back to a "saved state". The content in etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla is:      [Re-enable hibernate by default in upower] Identity=unix-user:* Action=org.freedesktop.upower.hibernate ResultActive=yes  [Re-enable hibernate by default in logind] Identity=unix-user:* Action=org.freedesktop.login1.hibernate;org.freedesktop.login1.handle-hibernate-key;org.freedesktop.login1;org.freedesktop.login1.hibernate-multiple-sessions;org.freedesktop.login1.hibernate-ignore-inhibit ResultActive=yes   Additional info: Ubuntu version: 16.04LTS  Kernel version:   uname -r 4.13.0-26-generic   Graphic info:   udo lspci | grep -E 'VGA|Display' [sudo] password di michele:  00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6730M/6770M/7690M XT] (rev ff) michele@michele-ubuntu:~$ sudo lshw -c display | grep driver        configuration: driver=i915 latency=0   CPU info:  sudo lscpu [sudo] password di michele: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 8 On-line CPU(s) list: 0-7 Thread(s) per core: 2 Core(s) per socket: 4 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 42 Model name: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz Stepping: 7 CPU MHz: 1995.561 CPU max MHz: 2900,0000 CPU min MHz: 800,0000 BogoMIPS: 3991.12 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 6144K NUMA node0 CPU(s): 0-7 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm epb pti tpr_shadow vnmi flexpriority ept vpid xsaveopt dtherm ida arat pln pts   Why does the resuming fail?  Thanks in advance for your help.
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I am using freshly installed Ubuntu 19.10 on a Dell Precision 7530 laptop.  Under settings - background, I cannot change the background to anything other that the default pictures.  According to Ubuntu Desktop Guide » Settings » Display &amp; screen » Change the desktop and lock screen backgrounds, "There are three choices displayed on top:.... "  This is incorrect. There is an "add picture" button, but no wallpapers, colors or pictures buttons.  I will appreciate any help getting this to work properly.  Thanks,  Paul
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I have just started to customize my Ubuntu a little bit and found the Arc-Dark theme to be exactly what I am looking for. There are some small things though. The color of the calendar on top is still white, and the font of the notifications and inside the calendar are off. This is what it looks like right now:  I would like to see the calendar being the same darker color, and maybe having the day numbers font in white. Also the font color of the search bar is off. There is text, but it is just as dark as the background.  It's only visible when you hover over the search bar.  How would I go about changing/tweaking these things? Or did I do something wrong during the installation? Edit: UnKNOWn has answered my question (accepted answer). The css-file was, in my instance, found at /usr/share/themes/Arc-Dark/gnome-shell/gnome-shell.css. I made the small changes to .calendar and .search-entry, saved the file (with sudo rights) and reloaded the theme by simply re-applying it with Gnome-Tweaks!
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I know this may sound stupid, but I was having a problem with my ubuntu, it wasn't loading.   So I was googling solutions and one of them was purging something and installing something   so I did it. The proccess took a couple hours, and it didn't work. It turns out it was something to do with my graphics card (which I fixed), but when I loaded it up, I had lubuntu.   Is there any way of reverting back to ubuntu?   Or is lubuntu better to keep? I have no idea, please help.
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I installed Ubuntu 18.04 After installation, I rebooted the computer, entered the grub menu, pressed e in ubuntu added the nomodeset option and Ubuntu presented the Gnome interface in a resolution of 1024X768 telling me: Unknown Display. So my question is how to install the drivers for my NVIDIA GTX 1050 graphics card
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I am using Ubntu-GNOME 16.04 with GNOME 3.20 When I install Nvidia graphic drivers by sudo apt-get install nvidia-361 , I am facing the following problems. During the installation of Nvidia-361, it asks me to select Default Display Manager with the following options  lightdm gdm3  Consequences of selecting lightdm  : The login screen becomes like this :  I don't want this screen. I want the Default (nice) GNOME login screen. Furthermore.... When I enter my password and press enter, I get this screen for about 5 seconds :  Consequences of selecting gdm3  : Well I get nothing! After rebooting, Ubuntu loads ... then all of a sudden my display turns of. No Light. I have waited enough but alas :( no change. NOTE: I have tried both nvidia-361 in default repositories and nvidia-361 from ppa:graphics-drivers/ppa. No difference. I also tried installing nvidia-364 and nvidia-367 from graphics-drivers:ppa , alas :( no much difference. Using nvidia-364 or nvidia-367 : When I tried these drivers, I could get GUI back. But I got stuck on the login page : login loop