Archive for Ubuntu 14.04

Ubuntu issues

Posted in Kids, Linux with tags , , , on February 28, 2015 by xi'an

screen shot with ubuntu 10.10It may be that weekends are the wrong time to tamper with computer OS… Last Sunday, I noticed my Bluetooth icon had a “turn off” option and since I only use Bluetooth for my remote keyboard and mouse when in Warwick, I turned it off, thinking I would turn it on again next week. This alas led to a series of problems, maybe as a coincidence since I also updated the Kubuntu 14.04 system over the weekend.

  1. I cannot turn Bluetooth on again! My keyboard and mouse are no longer recognised or detected. No Bluetooth adapter is found by the system setting. Similarly, sudo modprobe bluetooth shows nothing. I have installed a new interface called Blueman but to no avail. The fix suggested on forums to run rfkill unblock bluetooth does not work either… Actually rfkill list all only returns the wireless device. Which is working fine.
  2. My webcam vanished as well. It was working fine before the weekend.
  3. Accessing some webpages, including all New York Times articles, now takes forever on Firefox! If less on Chrome.

Is this a curse of sorts?!

As an aside, I also found this week that I cannot update Adobe reader from version 9 to version 11, as Adobe does not support Linux versions any more… Another bummer. If one wants to stick to acrobat.

Update [03/02]

Thanks to Ingmar and Thomas, I got  both my problems solved! The Bluetooth restarted after I shut down my unplugged computer, in connection with an USB over-current protection. And Thomas figured out my keyboard had a key to turn the webcam off and on, key that I had pressed when trying to restart the Bluetooth device. Et voilà!

top posts for 2014

Posted in Books, R, Statistics, University life with tags , , , on December 30, 2014 by xi'an

Here are the most popular entries for 2014:

17 equations that changed the World (#2) 995
Le Monde puzzle [website] 992
“simply start over and build something better” 991
accelerating MCMC via parallel predictive prefetching 990
Bayesian p-values 960
posterior predictive p-values 849
Bayesian Data Analysis [BDA3] 846
Bayesian programming [book review] 834
Feller’s shoes and Rasmus’ socks [well, Karl’s actually…] 804
the cartoon introduction to statistics 803
Asymptotically Exact, Embarrassingly Parallel MCMC 730
Foundations of Statistical Algorithms [book review] 707
a brief on naked statistics 704
In{s}a(ne)!! 682
the demise of the Bayes factor 660
Statistical modeling and computation [book review] 591
bridging the gap between machine learning and statistics 587
new laptop with ubuntu 14.04 574
Bayesian Data Analysis [BDA3 – part #2] 570
MCMC on zero measure sets 570
Solution manual to Bayesian Core on-line 567
Nonlinear Time Series just appeared 555
Sudoku via simulated annealing 538
Solution manual for Introducing Monte Carlo Methods with R 535
future of computational statistics 531

What I appreciate from that list is that (a) book reviews [of stats books] get a large chunk (50%!) of the attention and (b) my favourite topics of Bayesian testing, parallel MCMC and MCMC on zero measure sets made it to the top list. Even the demise of the Bayes factor that was only posted two weeks ago!

new laptop with ubuntu 14.04

Posted in Linux, R, Statistics, University life with tags , , , , on August 14, 2014 by xi'an

Screenshot 2014-05-31 21:55:55As I was getting worried about the chances of survival of my current laptop (bought in emergency upon my return from Kyoto!), I decided to use some available grant money to buy a new laptop without stepping through the emergency square. Thanks to my local computer engineer, Thomas, I found a local dealer selling light laptops with an already installed Ubuntu 14.04… And qwerty (UK) keyboards. Even though the previous move to Kubuntu 12.04 had been seamless, a failed attempt to switch a Mac to Ubuntu a few months later left me wary about buying a computer first and testing later whether or not it was truly Linux compatible. I am therefore quite happy with the switch and grateful to Thomas for the suggestion. I managed to re-compile my current papers and to run my current R codes, plus connect by wireless and read photos from my camera, hence validating the basic operations I primarily require from a computer! And reinstalled KDE. (I am still having difficulties with the size of the fonts in Firefox though. Which do not seem coherent from a tab to the next.) Enough to sacrifice a new sticker to cover the brand on its cover….