linux Archives - Beshoy Girgis

Virtualbox | Ubuntu | Chrome – Rendering Issue

Beshoy Girgis — Tue, 27 Nov 2012 18:37:46 +0000

I’ve been having crazy problems with Chrome hanging on my Virtualbox build. I couldn’t for the life of me figure out why Chrome was causing Ubuntu’s rendering to crash. All of a sudden when visiting a random site such as https://chrome.google.com/webstore, the virtual machine would turn all black or all white or rendering would be all sorts of crazy where I can’t click on anything ( objects are there, I can move windows around and what not, but they wouldn’t render as they really are ). I am at that point forced to hit alt+f2 and sudo poweroff as a sudo reboot would sometimes bring Ubuntu back up with the same rendering issues.

After much digging, I came across http://ubuntuforums.org/showthread.php?t=1974800 with a suggestion of starting Chrome with the following command:

google-chrome --blacklist-accelerated-compositing

I’ve come to find out that this may have resolved my rending issue! It seems to be more related to Virtualbox and how it’s handling 3D acceleration.

To update the desktop/launcher icons you can run:

locate google-chrome.desktop

Which will probably give you the following:

/opt/google/chrome/google-chrome.desktop
/usr/share/applications/google-chrome.desktop

Really, the only one you need to edit is the one in your /usr/share/applications/. You can also copy that file to ~/.local/share/applications/ and add

--blacklist-accelerated-compositing to the end of any "Exec=" line ( should be three -- one for first opening Chrome, one

My First Bash-Completion Script

Beshoy Girgis — Tue, 20 Nov 2012 01:27:45 +0000

By golly, I’ve finally done it! I love bash completion and must have it on any shell-based device I own. I’ve written countless numbers of scripts but for the most part, they’re fairly self-contained — with the exception of the “perms” script. This script is nice and quick on a one-site box where I can just run “perms” and my permissions for a set get reset to “production”. I use this so that when doing WordPress updates for example, I can chmod -R 777 then run perms after all my updates — nice and quick!

Servers running multiple sites require a more complex perms script which accepts a $1 variable of the domain. From there, I run the specific chowns and chmods and what not for that particular site using a case as well as some defaults that affect all the sites.

I’ve found it annoying to have to type “perms beshoy.girgis.us” or “perms odslabs.com” so I made a quick script to take care of the domain part for me. This script gets dropped in /etc/bash_completion.d/perms

# bash completion for perms

_perms()
{
	  cur=${COMP_WORDS[COMP_CWORD]}
	  COMPREPLY=( $( compgen -W "$(ls /vhosts/)" -- $cur ) )
}
complete -o default -o nospace -F _perms perms

Linux ( Gnome/Unity/KDE ) + Virtualbox + Mouse issues

Beshoy Girgis — Mon, 29 Oct 2012 14:52:07 +0000

After the latest Ubuntu upgrade my mouse became extremely unstable. I use Gnome 3 and at random times, my mouse’s X and Y values would jump to 0. This made it difficult to complete simple tasks as well as the annoyance of Gnome’s hot window from the top left corner being triggered constantly just by moving the mouse anywhere in the screen. A bit of research led me to an Arch Linux thread where others were experiencing the same issue. The solution turned out to be simple!:

xinput set-prop "VirtualBox mouse integration" "Coordinate Transformation Matrix" 0.5 0 0 0 0.5 0 0 0 1.0
xinput set-prop "VirtualBox mouse integration" "Coordinate Transformation Matrix" 1.0 0 0 0 1.0 0 0 0 1.0

More information can be found at the thread where I found the result, https://bbs.archlinux.org/viewtopic.php?pid=1150418#p1150418