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This article mainly introduces the Fedora display device configuration tools gtf and xdpyinfo how to use, the article is very detailed, has a certain reference value, interested friends must read it!

3. The usage of gtf

Gtf h-resolution v-resolution refresh [- v |-- verbose] [- f |-- fbmode] [- x |-- xorgmode]

For example: my monitor supports 1024x768, can reach 85HZ, in X mode

[beinan@localhost] # / usr/X11R6/bin/gtf 1024 768 85-x

# 1024x768 @ 85.00 Hz (GTF) hsync: 68.60 kHz; pclk: 94.39 MHz

Modeline "1024x768_85.00" 94.39 1024 1088 1200 1376 768 769 772 807-HSync + Vsync

Insert the output information above into the Modeline line and insert it into the Monitor configuration section in the / etc/X11/xorg.conf configuration file; similar to

Section "Monitor"

Identifier "Monitor0"

VendorName "Monitor Vendor"

ModelName "LCD Panel 1280x1024"

HorizSync 31.5-67.0

VertRefresh 50.0-75.0

Option "dpms"

Modeline "1024x768_85.00" 94.39 1024 1088 1200 1376 768 769 772 807-HSync + Vsync

EndSection

After the change, restart X; re-enter desktop mode

4. Xdpyinfo tool

We adjust the properties of the monitor through the gtf tool, and we generally know whether it is feasible by observing; for example, the screen does not flash too much; the display area is in the middle of the display screen; but we also have a test tool xdpyinfo to test our adjustment.

Xdpyinfo-display information utility for X (display information testing tool for X)

[beinan@localhost ~] $/ usr/X11R6/bin/xdpyinfo

Through this output, we can see a lot of information, the most important of which is the following paragraph

Default screen number: 0

Number of screens: 1

Screen # 0:

Dimensions: 1024x768 pixels (302x232 millimeters)

Resolution: 86x84 dots per inch

Depths (7): 24, 1, 4, 8, 15, 16, 32

Root window id: 0x3f

Depth of root window: 24 planes

We can define multiple display screens in xorg.conf, such as 1024x768 / 800x600, etc.; the sequence of identifiers defined by the display screen starts from 0, and so on; in fact, defining one is enough; the default is general; if we adjust it ourselves, add 1024x768 similar to the Modes line with a color depth of 24 in screen; then set the default color depth to 24

Section "Screen"

Identifier "Screen0"

Device "Videocard0"

Monitor "Monitor0"

DefaultDepth 24

SubSection "Display"

Viewport 0 0

Depth 16

Modes "800x600"640x480"

EndSubSection

SubSection "Display"

Viewport 0 0

Depth 24

Modes "1280x1024"1152x864"1152x768"1024x768"800x600"640x480"

EndSubSection

EndSection

In fact, in the above paragraph, we can delete the paragraph with a depth of 16 or the paragraph below with a # sign in front of each line; because we use 24

SubSection "Display"

Viewport 0 0

Depth 16

Modes "800x600"640x480"

EndSubSection

This will only work if we change 24 in DefaultDepth 24 to 16:00.

The above is all the contents of the article "showing how to use gtf and xdpyinfo in Fedora". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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