With no result after googling about it, I'm trying to figure it out if the new MSI PS42 8RB-035 is fully compatible with Ubuntu. Is there someone running Linux on the machine who could give me a feedback ?  Here is the spec :  or   To complete my question, it's not about how to empirically know about ubuntu compatibility in general but how to know cutting edge hardware compatibility where there is no information yet, precisely on the machine I gave in exemple.
I have a device on which I would like to install Ubuntu. How do I find out if Ubuntu will work on it?
Why do some Unicode text messages crash the iPhone OS? Proving the Lorentz invariance of the Lorentz invariant phase space element I have been looking around for a satisfactory answer to prove that  $$\frac{d^3\vec{p}}{2E_{\vec{p}}}$$  where $E_{\vec{p}}=+\sqrt{(|\vec{p}|c)^2+(mc^2)^2}$, is Lorentz invariant. The standard answer seems to be that the above measure is equal to  $$d^4p \, \delta (p^2-m^2)\theta(p_0)$$  where $p^2=p_0^2-|\vec{p}|^2$, and $\theta(x)$ is the step function. I understand these two are equivalent, but I don't understand why the second has to be Lorentz invariant, in particular why the Dirac delta has to be Lorentz invariant. I have found a  (section 2.1) that proves that $\delta^{(4)}(p-p')$ is Lorentz invariant, but I can't find a way to extend their method successfully here. In fact, all I can seem to get tells me the above isn't Lorentz invariant, and that in fact it should transform to   $$\frac{d^3\vec{p}'}{2\gamma E_{\vec{p}'}}$$  which makes sense from $d^4p$ being Lorentz invaraint and $dp_0$ transforming proportional to $\gamma$, but it isn't what everyone else says. What's the problem here?    An alternative way to "derive" the factor of $1/\gamma$:  $$\delta (p^2-m^2)\theta(p_0)=\frac{1}{E_{\vec p}}\delta(p_0-E_{\vec{p}})$$  Now, as $dp_0$ transforms to $\gamma dp_0$, the $\delta(p_0-E_{\vec{p}})$ should transform to $\gamma^{-1}\delta(p_0-E_{\vec{p}})$, as can be shown with an analogous argument to the one shown in the . The $E_{\vec{p}}$ also transforms to $\gamma(E_{\vec{p}}-v p_x)$ for an $x$-boost, but this doesn't seem to solve it. macOS app for showing external HDD usage statistics? I'm planning on selling a used external HDD on eBay.  Are there any applications for Mac out there (preferably free) that can show me statistics about the usage history for the drive so that I can let potential buyers know the condition more precisely? Is there any way to have BibTeX or biblatex insert a bibliography without having citations in the body of the document itself? Maybe a way to hide the in-text citations, so that BibTeX still sees them and includes them in the bibliography, but does not print them in the body? So I was in the middle of making a ball-shaped smoke, but the volumetric effect didn't work following the basic shape. It remains cube in Eevee Blender 2.8; while in Cycle it works, but in Cycle it takes thousands of years for Render. I have a Asus ROG G551VW laptop and I'm trying to install Ubuntu 16.04 on my laptop, but when i try to load the installer, my laptop just freezes and its fan starts working for no reason. I have tried to install Ubuntu 14.04 on my laptop and the installation went smoothly. What should I do if I want to install Ubuntu 16.04 on my laptop?  Any help would be greatly appreciated. Missing whitespace in beta site statistics box If time standard clocks and any memories about the time standard are destroyed, can we recover the time standard again? Assume the time standard clocks and any memories about the time standard are destroyed. Can we recover the time standard again exactly?  Recovering the time standard again means we can determine the date  and time that are exactly the same as the destroyed time standard clocks will show (if they are not destroyed). Can I make a script always execute as root? Say if I define a power series over some arbitrary field $F$ as   $$a = \sum^{ \infty }_{i = 0} a_{i} X^{i} $$  Then can I say:  $$ab = \sum^{ \infty }_{i = 0} \sum^{ \infty }_{j = 0} a_{i} b_{j} X^{i + j} $$ Username and Password not recognized when logging into Minecraft How to keep the spaces at the end and/or at the beginning of a String? I need to define a new command to create a squiggle arrow with some text on it. Something similar to what \xrightarrow command produces but with wiggly arrows as in \rightsquigarrow. The length of the arrow should automatically be adjusted to fit the text above it and I do not know how to handle this part in TikZ. Any ideas would be much appreciated. Can Mage Hand be used in combat to grab something from an opponent?  For example, one could grab a bow out of their hands or the arrows from a quiver, or try to push them out of a tree, etc.  Mage Hand can carry up to 10 pounds, but what is its ability to interact in situations like these? Here is my problematic code:  \begin{tikzpicture} \draw  (0,0)  to [bend left=20] (3,3) node[midway] {midway label}; \end{tikzpicture}   I wanted to put a label midway of the line, but instead the label is at (0,0).  If I remove [bend left=20], the line is not bent, and the label still misplaced. If I remove to and replace it by --, then it works fine, but my line is not bent any more.  \begin{tikzpicture} \draw (0,0) -- (3,3) node[midway] {midway label}; \end{tikzpicture}   Works fine.  The problem occurs with MacTeX 2011 and MacTeX 2012. Can I hire my kid and start a Roth IRA for him? I own an LLC, of which I am currently the sole member. It's my main source of income.  I am wondering if there is a reason why I could not do the following:   Hire my child as a part-time employee of the LLC, for an annual salary of $5500. Start a Roth IRA for the kid and put the $5500 into it. Deduct the $5500 as a payroll expense for my LLC, thereby reducing my amount of taxable income.   To me, this seems attractive because I'd lower my LLC's tax liability. Meanwhile, my kid would not have to pay any taxes on the $5500 because it is lower than the standard deduction. And by putting the money in a Roth IRA, he'd get an investment that would grow tax-free. It would essentially be like getting the pre-tax benefits of a traditional IRA with the post-tax benefits of a Roth.  The way I see it, I'd win, my kid would win and the IRS would lose, for once.  Is there any reason this wouldn't work? There is no minimum age or income for contributing to a Roth IRA. So as long as I could legally hire my kid, I don't see any obstacles. Noun order: "He and we..." or "We and he..."? Similarly, "...him and us" or "...us and him"? It's convention and polite to always list yourself last in a list. I say "John and I went to the store" and not "I and John went to the store."  So does that mean that I should always list myself last, even in the case when the pronoun that represents me is first person, plural (i.e. "us" or "we")? In my case, I'm writing a recommendation letter about my experience on a team with "John," who is the highlight of the letter. I hit a point where I was about to write something similar to:     John and we got a lot of experience working on the project.   or     That project's experience really benefited John and us.   Clearly, he is mentally separated from the others of us who were on the team, at least in this context, so I was just wondering if there were some grammatical conventions to govern this situation. Prove that if a function $f: X\to Y$ continuous then its graph is closed How can I get Gnome3 to remember my session? I am running Gnome3, but I had the same problem with Unity, on Ubuntu 12.04.  I have a fairly elaborate setup I enjoy using day-to-day. A LibreOffice spreadsheet with everyone's extension numbers; a window with reference data I use regularly; two mulit-tabbed Konsole/Terminal windows with several remote systems sessions, firefox with a set of open tabs, and so on. But whenever I log out, when I return, I must set up everything from scratch. I remember the good 'ol days, when I rebooted, I'd re-log in, and all my windows came back up in the same places as they were when I logged out, and my Konsole/Term would come up with the same remote logins as before.... I'd have to re -setup  some of my programs, but that's better than having to move every win into place, and resize them, etc.  How do I get this functionality back? Development with git branches/ gitflow and new modules I wonder if somebody found a solution for the following issue related to Drupal 8 development with Git branches:   You work on a new feature in a local feature branch for that you activate a contributed module or you write a custom module. This maybe delivers an own entity type and therefore creates a table after installing Meanwhile you need to fix a bug -> you change to a newly created bugfix branch which starts from the current dev branch After checking out the bugfix branch you import the current configurations to have the current active configuration of the branch -> the module you installed in feature branch is not activated anymore, the files of this module do not exist in the current bugfix branch You do your bugfixing and merge ths bugfix branch into develop branch. you change to your feature branch. To bring your local Drupal project to the status of this branch again you will import the configurations again   And here it comes to an exception: the table already exists in your database. When doing a drush cim it stops every following processing and you need to restart drush cim to import any further configurations.  Who does work with different feature branches and found a solution during development process to deal with this kind of situation?