- HOW TO CHECK GRAPHICS CARD UBUNTU DRIVERS
- HOW TO CHECK GRAPHICS CARD UBUNTU DRIVER
- HOW TO CHECK GRAPHICS CARD UBUNTU FULL
#!/bin/sh # Temporarily change resolutions (great for testing) # Example usage. Listing 9-1: Script to Test a Screen Resolution If you like the resolution, you can press Ctrl+C to kill the script, or run xrandr without the test script to set the resolution. If you want to test a screen change with xrandr, use a small script (see Listing 9-1) to save the current resolution, change the screen, and then change back. The xrandr command will change the resolution immediately and it assumes you know what you are doing.
Unfortunately, with xrandr, you do not have that luxury. This way, if the resolution is not supported and the display becomes dark or unreadable, then you just need to wait 20 seconds for it to switch back. When the Screen Resolution applet makes changes, it gives you 20 seconds to undo the change. However, it won't make any screen changes. If you specify an invalid screen resolution or refresh rate, then xrandr will fail with a cryptic error message. Xrandr -s 1 # screen size 1 is 1024x768 xrandr -s 1024x768 # specify by dimensions xrandr -s 1024x768 -r 70 # for 70 Hz (default listed is 75 Hz) xrandr -s 1 -r 70 # screen size 1 at 70 Hz Using the example, you can set the screen to 1024 × 768 with any of these commands: You can use xrandr to change resolutions by specifying one of the listed sizes.
This could damage your monitor and video card!
HOW TO CHECK GRAPHICS CARD UBUNTU DRIVER
The xrandr command shows your video driver resolutions and allows you to set a screen resolution that is not supported by your montior. Your video card, video driver, and monitor many not all support the same resolutions. These resolutions are not necessarily the same as the ones listed in /etc/X11/ nf (for X-Windows), and may not be supported by your monitor. In this example, my video driver supports 18 different screen resolutions, and up to 4 different refresh rates.
HOW TO CHECK GRAPHICS CARD UBUNTU FULL
The full list of supported screen resolutions can be found with the X-Windows rotate and reflection command: xrandr. The System Preferences Screen Resolution applet does not list all of your available screen resolutions and settings. You can also choose to set new resolution for your login account or make it a system-wide change.
From here, you can select the desired resolution and refresh rate. To change the default resolution, use the System Preferences Screen Resolution applet (see Figure 9-1). Thus, this is usually the default resolution. Unless you have a really old CRT monitor, your display probably supports 1024 × 768. If your graphics card supports 1280 × 1024 but your monitor supports only 1024 × 768, then you won't be able to see the display at 1280 × 1024. Unfortunately, ddcprobe does not always know about your monitor, especially if you are using old equipment. During the desktop install, they are used to identify the maximum resolution and to configure the /etc/X11/nf file. These commands identify the video card and monitor.
HOW TO CHECK GRAPHICS CARD UBUNTU DRIVERS
Other drivers include vesa, nvidia, nv, and i810. For example, sudo xre- sprobe ati works for the ATI driver. For example, to list all of the resolution information about my video card and monitor, I can use: $ sudo ddcprobe -? vbe: VESA 3.0 detected. The detection is done using the ddcprobe and xresprobe commands. During the installation, Ubuntu detects the graphics card and installs a usable driver.