I am trying to install Ubuntu 14.04 on Dell Inspiron 5537, and the installation completes with no errors, but when I boot into Ubuntu I get a popup window saying:      the system is running in low-graphics mode ... device settings could not detected correctly.   This model iscertified by Canonical! When I choose re-configure, I keep getting the same window! When I press esc, I get a black screen, and nothing happens.  How can I fix it?
Note: This is an attempt to create a canonical question that covers all instances of &quot;low-graphics mode&quot; error that occurs to a user, including but not limited to installation of wrong drivers, incorrect or invalid lightdm greeters, low disk space, incorrect installation of graphics card like ATI and Nvidia, incorrect configuration of xorg.conf file while setting up multiple monitors among others. If you are experiencing the &quot;low-graphics mode&quot; error when trying to login but none of the following answers work for you, please do ask a new question and then update the answers of this canonical question as and when your new question gets answered.   When I try to boot into my computer, I am getting this error:  The system is running in low-graphics mode Your screen, graphics cards, and input device settings could not be detected correctly. You will need to configure these yourself.   How do I fix the failsafe X mode and login into my computer?  Answer index:
What's the easiest way to unrar a file? I just realized I can't unrar .rar files on my Ubuntu machine!  What's the easiest way to accomplish this fundamental task? If possible I'd love something like 7Zip that I can just right Click, and extract and have the program worry about how to do it regardless if it's a .zip, a .rar or a .foo compressed file. E2099 Overflow in conversion or arithmetic operation What do all those cryptic number and letter codes in a lens name mean? What is the difference between #include  and #include "filename"? Do scimitars and rapiers count as swords for the magic items in the 5E DMG? Are rapiers and scimitars considered swords for magic items like:   Dancing Sword Defender Dragon Slayer Flame Tongue Frost Brand Giant Slayer Holy Avenger Luck Blade Nine Lives Stealer Sword of Life Stealing Sword of Sharpness (scimitar) Sword of Vengeance Sword of Wounding Vorpal Sword (scimitar)   Or are only shortswords (not Sword of Sharpness or Vorpal Sword), longswords and greatswords swords for these items and therefore available? How to use ampscript in order to pull user data from a second data extension? We have several data extensions that have data relationships with each other.  How can I send an email using one data extension while pulling data from a second data extension to personalize my email with ampscript?  I've tried Lookup in many different ways, but I've only managed to pull one specific row (the same row which is not personalized to each user) or all rows at once. I haven't been able to pull personalized data for each user.  In practice, I want to pull data from a DE called "Survey". Each user has a specific ID and some users have an "AnswerID", which varies. I want to to create IF/THEN statements based on that AnswerID.  Thanks, Sylvie What the #$@&%*! is that called? How to use Parameterized MessageFormat with non-Value attributes of JSF components Invoking JavaScript code in an iframe from the parent page How long should I keep my tax documents, and why? Proof that the Earth rotates? What is the proof, without leaving the Earth, and involving only basic physics, that the earth rotates around its axis?  By basic physics I mean the physics that the early physicists must've used to deduce that it rotates, not relativity. Combinatorial Proof Question: Vandermonde convolution identity How can I find help for new Ubuntu users? I've just started using Lubuntu 13.10. It's the first time I've ever used Linux.  Can any of you send me a tutorial-video for new users or explain the basics to me? If $|f(z)|\leq |f(z^2)|$ on the unit disk, show that $f$ is a constant function. Suppose $f$ is holomorphic in the unit disk $D=\{z: |z|&lt;1\}$ and $|f(z)|\leq |f(z^2)|$ on $D$. Show that $f$ is a constant function.   My Try:  I wanted to use Strong Maximum Principle, but failed to prove that $f$ is bounded on $D$. I want to try this problem in my own. Can anybody please give me just a hint? I just installed the lastest version of . I works fine but in order to use it, I have to enter the following in the terminal: cd ugene-1.11.5/ then execute ./ugene -ui to launch UGENE GUI.   This takes too long. I would like to build a .desktop file for UGENE to be used in Ubuntu 12.04 so that I can simply open it from the unity launcher.  Not sure if this is helpful but the website says: By default ugene script launches the command-line version of UGENE.  Here's what I have (not sure if it's right):  [Desktop Entry] Version=1.0 Name=my Unipro UGENE GenericName=Integrated Bioinformatics Suite Comment=Unipro UGENE is a cross-platform visual environment for DNA and protein sequence analysis. MimeType=text/english;text/plain;text/x-makefile;text/x-c++hdr;text/x-c++src;text/x-chdr;text/x-csrc;text/x-java;text/x-moc;text/x-pascal;text/x-tcl;text/x-tex;application/x-shellscript;text/x-c;text/x-c++; Exec=/home/samuel/ugene-1.11.5 ./ugene -ui -c %F Icon=/usr/share/icons/hicolor/scalable/apps/ugene.svg Type=Application Terminal=true Categories=Utility;Development; StartupWMClass=UGENE   I added the launcher named my Unipro UGENE to my unity bar and tried opening it but it doesn't appear. I must be missing something. I don't know what the StartWMCClass field is suppose to be nor do I know whether I entered the correct MimeType. Maybe a stupid question but how can I tell if I have a static IP address or a dynamic IP address? Running Fedora-13 $S^2 \times S^2$ is diffeomophic to $G_2(\mathbb{R}^4)$ $G_2(\mathbb{R}^4)$ is the Grassmannian manifold of two-dimensional subspaces of $\mathbb{R}^4$. I would like a detailed proof. Can it be done explicitly? I mean, showing the map and checking its differentiability using charts? Prove that $ \int _a^b\:f\left(x\right)\:\:dx\:=\:\int _a^b\:f\left(a+b-x\right)\:\:dx $ This is the prove- $y=a+b-x$. Then $dy/dx=-1$ and thus $$\int_a^bf(a+b-x)dx= \int_b^a-f(y)dy = \int_a^bf(x)dx$$  But I dont understand the last part of this - Why ? $$\int_b^a-f(y)dy = \int_a^bf(x)dx$$  I know that $\int_b^a-f(y)dy = \int_a^bf(y)dy $. But something is not clear to me. Multivariable limit proof: $\lim\limits_{(x,y)\rightarrow (0,0)}\frac{\left|x\right|^a\left|y\right|^b}{\left|x\right|^c + \left|y\right|^d} = 0$ I have some trouble with this: Show that if $a, b \ge 0$, $c, d &gt; 0$ and $\frac{a}{c} + \frac{b}{d} &gt; 1$ then   $$\lim_{(x,y)\rightarrow (0,0)}\frac{\left|x\right|^a\left|y\right|^b}{\left|x\right|^c + \left|y\right|^d} = 0$$  we were not really shown how to evaluate multivariable limits other than trying different paths, which wouldn't work when the limit exists, or by applying the squeeze theorem which is my initial plan. Unfortunately I cannot find a proper bound for the denominator and so I am quite lost right now. Any help would be appreciated. Are there rules for falling in water vs. diving vs. just jumping in for various depths of water? Just realized that in DMing 5e I have unconsciously used a falling-in-water rule-of-thumb that I inherited from somewhere (maybe 2e or AD&amp;D or maybe even Pathfinder). The ruling I've been using is as follows:   No damage for 20 feet of falling. Half-damage next 20 feet. Normal damage beyond that.   Realizing there should be a Strength (Athletics) for "swimming" (in context, "diving") to take even less damage with a proper dive in sufficiently deep water, I started to look for specifics on that. Am I just missing it somewhere? (Also didn't find it searching this stack.)  Are there clear 5e rules for both jumping and diving in water of various depths?