how to get better quality on PSP games in RetroArch

 I don't have a very powerful machine to run simulators. Here're the bare minimum changes I made to PPSSPP core.

• set Internal Resolution (Restart) to 960x544 (2x)
• set Texture Scaling Level to 5x

Can you tell the difference between the 2?

how to temporarily increase resolution in Ubuntu

I'm happy with 1366 x 768, however it's not vertically enough for some software. Here's how you can increase resolution temporarily.

$ xrandr --output LVDS-1 --panning 1708x960 --scale 1.25x1.25

Or you can even make it a 16:10 by 

$ xrandr --output LVDS-1 --panning 1600x1000 --scale 1.171x1.302

You can reset resolution by log out and log in again, or

$ xrandr --output LVDS-1 --panning 1366x768 --scale 1x1