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/ […]

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, […]