permanent resolution 1920x1080

[Foster]

For some weeks I have tried to improve the quality of my HP monitor which calls for 1920x1080 resolution. Following on line advice I ONCE managed to set the desired 1920x1080 which was lost at the next boot.
following on I can not re-find the correct modeline by using cvt , obviously I am doing something wrong but struggle with poor eyesight & rubbish typing so try to avoid using terminal in case I "brick" yhe system.
Please could someone give a line by line blow by blow account of how to find & keep a working 1920x1080 resolution

[Lord Boltar]

Have a look here

https://wiki.ubuntu.com/X/Config/Resolution

You can also load a frontend for xander such as ARandR and Grandr that will help make the process simpler

[AndyMH]

I had problems with LM19 and my ultrawide monitor, what I found was that cvt was NOT returning the right modeline. Use get-edid instead, you will need to install read-edid from software manager.

The full story is here:
viewtopic.php?f=46&t=280143

[Foster]

Thanks to both of your suggestions, sadly nothing worked

[AndyMH]

What did you do, what was the output. Post the results here, we can probably help. For starters, what version of mint are you using?

[Foster]

typing cvt into terminal shows usage: cvt [ -v| --verbose] [-r| --reduced] x y [refresh]
-v| --verbose : Warn about CVT standard adherance.
-r| --reduced : Create a mode with reduced blanking
x : Desired horizontal resolution (multiple of 8. required).
y : Desired vertical resolution (required)
refresh : Desired refresh rate (default: 60.0Hz)
Calculates VESA CVT (Coordinated Video Timing) modelines for use withx.

[Foster]

Forgot to say Mint 18.3 Sylvia

[AndyMH]

With the monitor you want to work at 1920x1080 connected (I assume it's what you are using but at a lower res), type xrandr in a terminal. What we are looking for is which port is the monitor connected to. For all monitors connected it will display the available resolutions. For example, my monitor is on HDMI-2, which I can see from part of the output:

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VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 connected primary 2560x1080+0+0 (normal left inverted right x axis y axis

Then in a terminal type:

Code: Select all

cvt 1920 1080

you will get something like this as output (but the numbers will be different):

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# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

This tells you the modeline you need to use. Then in the terminal enter (replacing everything after newmode with the modeline you got from cvt above):

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xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

then (replacing HDMI-2 with whatever your monitor is connected to, and "1920x1080_60.00" with the output of cvt if different):

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xrandr --addmode HDMI-2 "1920x1080_60.00"

Now go into the mint menu > preferences > display. 1920x1080 should now be there, select it, does it work?

If it works, to make it permanent, edit the file .profile to add the the two lines above for newmode and addmode at the end. This file lives in your home folder.

[kyphi]

The monitor resolution should be detected and the monitor identified automatically.

Have a look in System Settings (it is in the main menu), Hardware, Display where there are a number of resolutions available to be chosen. Click Apply after making your selection.

My HP monitor (HP 25er) automatically sets to 1920 x 1080.

[AndyMH]

kyphi is right, the system should automatically detect the resolutions available on the monitor. My post is what to do if the resolution you want is not present in menu > preferences > display, i.e. mint is not detecting the resolution you want and you know that the monitor supports it.

[Foster]

unfortunately the monitor is shown as "unknown"

[Foster]

Thanks Andy will try again following your instructions

[Foster]

typing cvt into terminal does not give any modeline results ,only displays the result as shown above. Tried sudo , same result.

[AndyMH]

You are typing in what I gave in full, not just cvt?

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cvt 1920 1080

[Foster]

Yes I type cvt 1920x1080 , sorry for the delay the internet has been down for quite some time today.

[AndyMH]

cvt 1920x1080 is wrong! There is no x, just a space, cvt 1920 1080

[Foster]

OK Thanks Will try again tomorrow

[Foster]

OK I can now see the modeline but when I write in newmode I get ,failed to parse -hsync as a number

[AndyMH]

Post the results of what you are getting in your reply - copy and paste the outputs from the terminal in your reply, you can enclose them in the code markers (the </> button above your reply window). What I want to see is your equivalent of:

Code: Select all

andy@T430 ~ $ cvt 1920 1080
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
andy@T430 ~ $ xrandr --newmode HDMI-2 "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
xrandr: unrecognized option '-hsync'
Try 'xrandr --help' for more information.
andy@T430 ~ $ 

Also post the output from xrandr, for example:

Code: Select all

andy@T430 ~ $ xrandr
Screen 0: minimum 320 x 200, current 2560 x 1080, maximum 8192 x 8192
LVDS-1 connected (normal left inverted right x axis y axis)
   1600x900      60.01 +  59.99    59.94    59.95    59.82    40.00  
   1440x900      59.89  
   1400x900      59.96    59.88  
   1440x810      60.00    59.97  
   1368x768      59.88    59.85  
   1360x768      59.80    59.96  
   1280x800      59.99    59.97    59.81    59.91  
   1152x864      60.00  
   1280x720      60.00    59.99    59.86    59.74  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   1024x576      59.95    59.96    59.90    59.82  
   960x600       59.93    60.00  
   960x540       59.96    59.99    59.63    59.82  
   800x600       60.00    60.32    56.25  
   840x525       60.01    59.88  
   864x486       59.92    59.57  
   800x512       60.17  
   700x525       59.98  
   800x450       59.95    59.82  
   640x512       60.02  
   720x450       59.89  
   700x450       59.96    59.88  
   640x480       60.00    59.94  
   720x405       59.51    58.99  
   684x384       59.88    59.85  
   680x384       59.80    59.96  
   640x400       59.88    59.98  
   576x432       60.06  
   640x360       59.86    59.83    59.84    59.32  
   512x384       60.00  
   512x288       60.00    59.92  
   480x270       59.63    59.82  
   400x300       60.32    56.34  
   432x243       59.92    59.57  
   320x240       60.05  
   360x202       59.51    59.13  
   320x180       59.84    59.32  
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 connected primary 2560x1080+0+0 (normal left inverted right x axis y axis) 673mm x 284mm
   1920x1080     60.00    50.00    59.94  
   1920x1080i    60.00    50.00    59.94  
   1680x1050     59.88  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08  
   2560x1080     60.00* 
HDMI-3 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
andy@T430 ~ $ 

This will tell me what resolutions and what port your monitor is connected to.

If may be that cvt is returning the wrong modeline (as my example above) or you have the port wrong or we need to get the modeline directly from the monitor using get-edid

[Foster]

OK I have installed get edid & in a nutshell it says that the video card & monitor are not compatible. the monitor is an HP2311c & the VGA controller is Intel 82945G/GZ integrated controller (rev 02)
I would post the results from the terminal but I do not know how to save the results to home or desktop
Am I trying to get a quart out of a pint pot?