Fix backlight after resume on Linux 3.8 + Intel graphics

For some reason Linux 3.8 doesn’t resume from suspend properly on my Samsung Series 9 NP900X3C. From the comments on this Arch bug report it seems that the system is actually resuming, but the display back light isn’t coming back on. One user suggested using systemd to run the following script at system resume, /usr/lib/systemd/system-sleep/linux-3.8-backlight.sh: […]

Troubleshooting GlusterFS performance issues

I’m in the middle of a new GlusterFS deployment for our research computing infrastructure (storage of Bioinformatics and GIS data). At first I was just happy to see the huge size of my /home partition when I did df -h, but I quickly found that performance wasn’t quite what I was expecting and I started […]

Migrating from screen to tmux

I’ve been using GNU screen since 2005 or so. Not only is it a great way to arrange your work (multiple terminals in one window, a terminal “multiplexer”), it allows for detaching and reattaching (keep remote jobs running even when the connection drops). The problem is that screen is no longer actively maintained and is […]

Using SNA acceleration for Xorg

I’ve been getting micro hiccups on Xorg + gnome-shell using Intel HD Graphics for quite some time now; lag when switching virtual desktops, alt-tabbing apps, and even sometimes when typing in the terminal (local, not over SSH!). I’ve noticed it on both this current machine, a Samsung Series 9 NP900X3C with Intel HD 4000 Graphics, […]

Blacklisting pcspkr

pcspkr is evil! Kill it with fire! No, but seriously, it’s so annoying amirite?! Whenever I’m poking around in a virtual terminal and I hit Tab that damn beep scares the bejesus out of me. Last week I installed ifplugd and it beeps in several different tones whenever the Ethernet cable gets unplugged (or downed, […]