I reinstalled Ubuntu 16.04, then installed nvidia-current and run sudo dpkg-reconfigure xserver-xorg  rebooted and gets stuck in a login loop. My graphic card is GeForce 6150SE nForce 430. Can some help me solve the issue?
My Ubuntu is stuck in a login loop when trying to enter my desktop. When I login, the screen gets black and soon after that the login screen comes back.   I've read that the problem might be caused by an error depending on the graphics, here's my graphics card: ATI Radeon 7670M
"not a valid identifier" when I do "export $PATH" When I run export $PATH in bash, I get the error not a valid identifier. Why? When —the bartender at the Cantina at Mos Eisley spaceport in the first Star Wars—says:     “We don’t serve their kind here.”   In reference to C-3PO and R2-D2 entering the bar, it’s certainly a bit prejudicial, but are these commonly held views in this universe? We don’t see it happen anywhere else in the films but is it implied elsewhere? I am developing a game with a Minecraft-like terrain made out of blocks. Since basic rendering and chunk loading is done now, I want to implement block selecting.  Therefore I need to find out what block the first person camera is facing. I already heard of unprojecting the whole scene but I decided against that because it sounds hacky and isn't accurate. Maybe I could somehow cast a ray in view direction but I do not know how to check the collision with a block in my voxel data. Of course this calculations must be done on the CPU since I need the results to perform game logic operations.  So how could I find out which block is in front of the camera? If it is preferable, how could I cast a ray and check collisions? What is the datatype of facebook userid Power failure during upgrade During upgrade from 12.04 to 12.10 there was a power failure.  computer boots to desktop but without tools and menus to navigate.  files that can be open cannot be closed.  sidebar menu does not exist.  there is no function of the DVD drive, the USB drive nor the internet.  Possible to open GRUB but I am not familiar with it's function.  Please help. What does \s! do? IN clause and placeholders Function with same name but different signature in derived class Land ratio vs mana curve When choosing cards for a deck, one of the most important things to consider is the number of land you put in. The biggest issue is mana curve, of course. What shortcuts are best for determining the proper amount of land with a given mana curve? Structure of groups of order $pq$, where $p,q$ are distinct primes. I don't know about the Sylow Theorems.  But I have been wondering about a proof of the fact that a group or order $pq$ where $p$ and $q$ are distinct primes must be cyclic. I can't quite work out the details, but here is the general idea. I would like help with filling in details. I assume that it is already known that $G$ has subgroup(s) of order $p$ and subgroup(s) of order $q$.  If $G$ is a group of order $pq$ ($p\neq q$), then I know that $G$ has a subgroup $H$ of order $p$ and a subgroup $K$ of order $q$. Then $H\simeq \mathbb{Z}_p$ and $K\simeq \mathbb{Z}_q$.   But then $H\oplus K \simeq \mathbb{Z}_{pq}$, so I would think that $H\oplus K \simeq G$. I guess one could do an internal direct product instead of an external direct product, but I don't know that $H$ and $K$ are normal subgroups.  I am asking for help completing this argument.  Edit: I see from the comments below that I might need to assume that the smaller prime does not divide the larger prime minus $1$. Or maybe it is enough to assume that the primes are greater than or equal to $3$ (Still distinct). No splitter widget in new separate window I am new to Blender and I am trying to find my way through its interface. I want to have several windows (I mean OS windows, not Blender windows). So I create a separate window by dragging splitter widget while holding Shift.  The problem is there are no splitter widgets in the newly created OS window. So I can't have multiple blender windows in it. The new window does not have a Layout type drop down menu either. So how do I add new Blender windows in a new OS window? (Sorry if I'm using the wrong terms, but hopefully its clear what I am trying to achieve). If you view the Earth from far enough away can you observe its past? Given: a = 1 b = 10 c = 100  How do I display a leading zero for all numbers with less than two digits? This is the output I'm expecting: 01 10 100 How can I get a DisplayLink USB monitor work under Ubuntu? I have a DisplayLink-based external USB monitor, which has both power and data over USB, and seems to work perfectly under Windows 7, but only can display a text console under Ubuntu 10.10, and that I can only use when I am actually switched to it. So the only Use I can have so far is to have some text-based monitoring or console that I can watch while working on the graphic display.   I know there are some development done for DisplayLink, but I never could get it to actually run properly.   Yes, I tried the detailed setup described in other , but they did not work, and instead crashed my X that I had to restore.   Merci :-) Double line spacing Error entering equation in DSolve The suffix -phobia means fear of, often irrational fear of.  For example, according to Wikipedia:       or ophiophobia is a particular type of specific phobia,   the abnormal fear of snakes.   Is there a suffix attachable to ophidio- which would describe a person who is not afraid of snakes, except for, say, a coiled rattler encountered on a trail, but who dislikes them and would not willingly share space with one?  Similarly, an  (don't click here if you are at all arachnophobic) is someone who loves spiders.  Is there a suffix for someone who likes spiders but does not love them?  These are Greek suffixes, and the Greeks, theoretically, were in favor of moderation.  So, are there suffixes in use in English, derivable from Greek or not, for moderate like and moderate dislike?    Edit to explain why the question:  "Is there a suffix for loathing" does not answer my question.  My question is NOT about fear and/or loathing.  My question is about moderate dislike (and moderate like).  I can watch a snake cross my driveway with interest, but would not want it in the house or lounging on my patio.   A person who loathed snakes would not be able to admire the smooth motion of the snake as it glided over the rough gravel and disappeared into the woods.  Loathe is very different from moderate dislike; Phobia is very different from caution. Am I Using JDBC Connection Pooling? How to read and understand the java stack trace? How to prove $x^a-1\mid x^b-1 \iff a \mid b$, where $x \ge 2$ and $a,b,x \in \Bbb Z$.  I've tried the following in attempting to solve this:  $$a\mid b \Rightarrow aq=b \Rightarrow x^{aq}=x^b \Rightarrow x^ax^q=x^b$$  Because $x^q \in \Bbb Z$, it follows that $x^a\mid x^b$.  This is as far as I have gotten; any help getting further is appreciated.  Note: It may be that this identity is not true at all?